Manual Garmin Descent MK2i (page 2 of 70) (English)

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Descent

™

Mk2i

Owner’s Manual

products and to make changes in the content of this manual without obligation to notify any person or organization of such changes or improvements. Go to www.garmin.com for current updates

and supplemental information concerning the use of this product.

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™

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™

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This product is ANT+

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Table of Contents

Introduction.....................................................................1

Getting Started............................................................................1

Buttons................................................................................... 1

Using the Watch.....................................................................1

Viewing the Controls Menu............................................... 1

Viewing Widgets................................................................1

Customizing the Watch.......................................................... 2

Default Watch Face............................................................... 2

Pairing Your Smartphone........................................................... 2

Charging the Device................................................................... 2

Product Updates......................................................................... 2

Setting Up Garmin Express................................................... 2

Diving.............................................................................. 2

Dive Warnings............................................................................ 2

Dive Modes................................................................................. 3

Using the Pool Dive Mode..................................................... 3

Dive Setup.................................................................................. 3

Setting Up Your Breathing Gases.......................................... 3

Setting PO2 Thresholds......................................................... 4

Setting CCR Setpoints........................................................... 4

Air Integration............................................................................. 4

Installation and Setup............................................................ 4

Transmitter Position Tips.................................................. 4

Installing the Transmitter on Your Tank Regulator........... 5

Installing the Transmitter on a High Pressure Hose

Extension.......................................................................... 5

Pairing the Transmitter with a Descent Mk2i Dive

Computer............................................................................... 6

Selecting Paired Transmitters to View on Your Dive Data

Screens............................................................................. 6

Transmitter Settings............................................................... 6

Selecting the Gas Consumption Rate Metric......................... 7

Including Transmitters in Gas Consumption Calculations..... 7

Dive Data Screens...................................................................... 7

Single-Gas and Multi-Gas Data Screens............................... 7

CCR Data Screens................................................................ 7

Gauge Data Screens............................................................. 8

Apnea and Apnea Hunt Data Screens................................... 8

Starting a Dive............................................................................ 8

Navigating with the Dive Compass........................................ 8

Using the Dive Stopwatch...................................................... 8

Viewing the Transmitter Data Screens.................................. 9

Switching Gases During a Dive............................................. 9

Switching Between CC and OC Diving for a Bailout

Procedure.............................................................................. 9

Performing a Safety Stop....................................................... 9

Performing a Decompression Stop........................................ 9

Diving with the Map..............................................................10

Viewing the Surface Interval Widget......................................... 10

Viewing the Dive Log Widget.................................................... 10

Dive Planning............................................................................10

Calculating NDL Time.......................................................... 10

Creating a Decompression Plan.......................................... 10

Viewing and Applying a Decompression Plan..................... 11

Editing a Decompression Plan............................................. 11

Deleting a Decompression Plan...........................................11

No-Fly Time.............................................................................. 11

Altitude Diving........................................................................... 11

Tips for Wearing the Device with an Exposure Suit................. 11

Dive Alerts................................................................................ 11

Transmitter Alerts..................................................................... 12

Enabling Lost Transmitter Alerts.......................................... 12

Dive Terminology...................................................................... 12

Activities and Apps...................................................... 12

Starting an Activity.................................................................... 12

Tips for Recording Activities................................................ 13

Changing the Power Mode.................................................. 13

Stopping an Activity.................................................................. 13

Adding or Removing a Favorite Activity.................................... 13

Creating a Custom Activity....................................................... 13

Indoor Activities........................................................................ 13

Going for a Virtual Run........................................................ 13

Calibrating the Treadmill Distance....................................... 13

Recording a Strength Training Activity.................................13

Outdoor Activities......................................................................14

Viewing Tide Information..................................................... 14

Viewing Your Ski Runs........................................................ 14

Recording a Backcountry Skiing Activity..............................14

Using the Metronome...........................................................14

Playing Audio Prompts During an Activity............................15

Jumpmaster......................................................................... 15

Multisport.................................................................................. 15

Triathlon Training................................................................. 15

Creating a Multisport Activity............................................... 15

Swimming................................................................................. 15

Swim Terminology............................................................... 15

Stroke Types........................................................................ 15

Tips for Swimming Activities................................................ 15

Resting During Pool Swimming........................................... 16

Auto Rest............................................................................. 16

Training with the Drill Log.................................................... 16

Turning Off Wrist-based Heart Rate While Swimming......... 16

Golfing...................................................................................... 16

Playing Golf..........................................................................16

Hole Information...................................................................16

Big Numbers Mode......................................................... 16

Measuring Distance with Button Targeting.......................... 16

Changing Holes................................................................... 16

Moving the Flag................................................................... 17

Viewing Measured Shots..................................................... 17

Viewing Layup and Dogleg Distances................................. 17

Saving Custom Targets...................................................17

Keeping Score..................................................................... 17

Updating a Score............................................................ 17

Setting the Scoring Method............................................. 17

Setting Your Handicap.................................................... 17

Enabling Statistics Tracking............................................ 17

TruSwing™.......................................................................... 17

Using the Golf Odometer..................................................... 18

Viewing PlaysLike Distance................................................. 18

Viewing the Direction to the Pin........................................... 18

Starting an Expedition.............................................................. 18

Changing the Track Point Recording Interval...................... 18

Recording a Track Point Manually....................................... 18

Viewing Track Points........................................................... 18

Connected Features..................................................... 18

Enabling Bluetooth Notifications............................................... 18

Viewing Notifications............................................................ 19

Receiving an Incoming Phone Call...................................... 19

Replying to a Text Message................................................ 19

Managing Notifications.........................................................19

Turning Off the Bluetooth Smartphone Connection.................. 19

Turning On and Off Smartphone Connection Alerts................. 19

Locating a Lost Mobile Device.................................................. 19

Garmin Dive App...................................................................... 19

Garmin Connect........................................................................19

Updating the Software Using the Smartphone Apps........... 20

Updating the Software Using Garmin Express.................... 20

Using Garmin Connect on Your Computer..................... 20

Table of Contents i

Manually Syncing Data with Garmin Connect..................... 20

Garmin Explore™..................................................................... 20

Garmin Golf™ App................................................................... 20

Safety and Tracking Features..................................... 20

Adding Emergency Contacts.................................................... 20

Adding Contacts....................................................................... 21

Turning Incident Detection On and Off..................................... 21

Requesting Assistance............................................................. 21

Starting a GroupTrack Session.................................................21

Tips for GroupTrack Sessions............................................. 21

GroupTrack Settings............................................................ 21

Wi‑Fi® Connected Features........................................ 21

Connecting to a Wi‑Fi Network................................................. 21

Connect IQ Features.................................................... 21

Downloading Connect IQ Features.......................................... 22

Downloading Connect IQ Features Using Your Computer....... 22

Garmin Pay................................................................... 22

Setting Up Your Garmin Pay Wallet......................................... 22

Paying for a Purchase Using Your Watch................................ 22

Adding a Card to Your Garmin Pay Wallet............................... 22

Managing Your Garmin Pay Cards...................................... 22

Changing Your Garmin Pay Passcode..................................... 22

Music............................................................................. 22

Connecting to a Third-Party Provider....................................... 22

Downloading Audio Content from a Third-Party Provider.... 23

Downloading Audio Content from Spotify®......................... 23

Changing the Music Provider............................................... 23

Disconnecting from a Third-Party Provider.......................... 23

Downloading Personal Audio Content...................................... 23

Listening to Music..................................................................... 23

Music Playback Controls.......................................................... 23

Connecting Bluetooth Headphones.......................................... 23

Changing the Audio Mode........................................................ 23

Heart Rate Features..................................................... 23

Wrist-based Heart Rate............................................................ 23

Wearing the Device..............................................................23

Tips for Erratic Heart Rate Data...........................................24

Viewing the Heart Rate Widget............................................ 24

Broadcasting Heart Rate Data to Garmin Devices.............. 24

Broadcasting Heart Rate Data During an Activity........... 24

Setting an Abnormal Heart Rate Alert................................. 24

Turning Off the Wrist-based Heart Rate Monitor................. 24

Running Dynamics....................................................................24

Training with Running Dynamics......................................... 25

Color Gauges and Running Dynamics Data........................ 25

Ground Contact Time Balance Data............................... 25

Vertical Oscillation and Vertical Ratio Data.....................25

Tips for Missing Running Dynamics Data............................ 26

Performance Measurements.................................................... 26

Turning Off Performance Notifications................................. 26

Detecting Performance Measurements Automatically......... 26

Syncing Activities and Performance Measurements........... 26

About VO2 Max. Estimates.................................................. 26

Getting Your VO2 Max. Estimate for Running................ 26

Getting Your VO2 Max. Estimate for Cycling.................. 27

Viewing Your Predicted Race Times................................... 27

About Training Effect........................................................... 27

Heart Rate Variability and Stress Level............................... 27

Viewing Your Heart Rate Variability and Stress Level.... 27

Performance Condition........................................................ 27

Viewing Your Performance Condition............................. 28

Lactate Threshold................................................................ 28

Performing a Guided Test to Determine Your Lactate

Threshold........................................................................ 28

Getting Your FTP Estimate

.................................................. 28

Conducting an FTP Test................................................. 28

Training Status..........................................................................28

Training Status Levels......................................................... 29

Tips for Getting Your Training Status.............................. 29

Heat and Altitude Performance Acclimation........................ 29

Training Load....................................................................... 29

Training Load Focus............................................................ 29

Recovery Time..................................................................... 30

Viewing Your Recovery Time.......................................... 30

Recovery Heart Rate.......................................................30

Body Battery™..........................................................................30

Viewing the Body Battery Widget.........................................30

Tips for Improved Body Battery Data................................... 30

Pulse Oximeter............................................................. 30

Getting Pulse Oximeter Readings............................................ 30

Turning On All-Day Pulse Oximeter Readings......................... 31

Turning Off Automatic Pulse Oximeter Readings..................... 31

Turning On Pulse Oximeter Sleep Tracking............................. 31

Tips for Erratic Pulse Oximeter Data........................................ 31

Training......................................................................... 31

Setting Up Your User Profile.....................................................31

Fitness Goals....................................................................... 31

About Heart Rate Zones...................................................... 31

Setting Your Heart Rate Zones....................................... 31

Letting the Device Set Your Heart Rate Zones............... 32

Heart Rate Zone Calculations......................................... 32

Setting Your Power Zones................................................... 32

Activity Tracking........................................................................32

Auto Goal............................................................................. 32

Using the Move Alert............................................................32

Sleep Tracking..................................................................... 32

Using Automated Sleep Tracking....................................32

Using Do Not Disturb Mode............................................ 32

Intensity Minutes.................................................................. 32

Earning Intensity Minutes................................................ 33

Garmin Move IQ™............................................................... 33

Activity Tracking Settings..................................................... 33

Turning Off Activity Tracking........................................... 33

Workouts...................................................................................33

Following a Workout From Garmin Connect........................ 33

Starting a Workout............................................................... 33

About the Training Calendar................................................ 33

Using Garmin Connect Training Plans............................ 33

Adaptive Training Plans.................................................. 33

Interval Workouts...................................................................... 34

Creating an Interval Workout............................................... 34

Starting an Interval Workout................................................ 34

Stopping an Interval Workout...............................................34

PacePro Training...................................................................... 34

Downloading a PacePro Plan from Garmin Connect........... 34

Starting a PacePro Plan.......................................................34

Stopping a PacePro Plan................................................ 34

Creating a PacePro Plan on Your Watch............................ 34

Segments..................................................................................35

Strava™ Segments.............................................................. 35

Viewing Segment Details..................................................... 35

Racing a Segment............................................................... 35

Setting a Segment to Adjust Automatically.......................... 35

Using Virtual Partner®.............................................................. 35

Setting a Training Target.......................................................... 35

Cancelling a Training Target................................................ 35

Racing a Previous Activity........................................................ 35

Personal Records..................................................................... 36

Viewing Your Personal Records.......................................... 36

Restoring a Personal Record............................................... 36

ii Table of Contents

Clearing a Personal Record................................................. 36

Clearing All Personal Records............................................. 36

Clocks............................................................................ 36

Setting an Alarm....................................................................... 36

Editing an Alarm...................................................................36

Starting the Countdown Timer.................................................. 36

Deleting a Timer...................................................................36

Using the Stopwatch................................................................. 36

Adding Alternate Time Zones................................................... 37

Editing an Alternate Time Zone........................................... 37

Navigation..................................................................... 37

Saving Your Location............................................................... 37

Editing Your Saved Locations.............................................. 37

Projecting a Waypoint............................................................... 37

Navigating to a Destination....................................................... 37

Navigating to a Point of Interest............................................... 37

Points of Interest.................................................................. 37

Creating and Following a Course on Your Device.................... 37

Creating a Round-Trip Course..................................................37

Viewing or Editing Course Details............................................ 38

Using ClimbPro......................................................................... 38

Marking and Starting Navigation to a Man Overboard

Location.................................................................................... 38

Navigating with Sight 'N Go...................................................... 38

Navigating to Your Starting Point During an Activity................ 38

Viewing Route Directions..................................................... 38

Navigating to the Starting Point of a Saved Activity................. 38

Stopping Navigation................................................................. 39

Map........................................................................................... 39

Viewing the Map.................................................................. 39

Saving or Navigating to a Location on the Map................... 39

Navigating with the Around Me Feature.............................. 39

Changing the Map Theme................................................... 39

Compass...................................................................................39

Setting the Compass Heading............................................. 39

Altimeter and Barometer........................................................... 39

History........................................................................... 40

Using History............................................................................ 40

Multisport History................................................................. 40

Viewing Your Time in Each Heart Rate Zone...................... 40

Viewing Data Totals.................................................................. 40

Using the Odometer..................................................................40

Deleting History........................................................................ 40

Customizing Your Device............................................ 40

Activities and App Settings....................................................... 40

Customizing the Data Screens............................................ 41

Adding a Map to an Activity................................................. 41

Alerts.................................................................................... 41

Setting an Alert................................................................42

Activity Map Settings............................................................42

Routing Settings...................................................................42

Auto Lap...............................................................................42

Marking Laps by Distance............................................... 42

Enabling Auto Pause........................................................... 42

Enabling Auto Climb............................................................ 43

3D Speed and Distance....................................................... 43

Turning On and Off the Lap Key.......................................... 43

Using Auto Scroll................................................................. 43

Changing the GPS Setting................................................... 43

GPS and Other Satellite Systems................................... 43

UltraTrac......................................................................... 43

Power Save Timeout Settings..............................................43

Changing the Order of an Activity in the Apps List................... 43

Widgets..................................................................................... 44

Customizing the Widget Loop.............................................. 44

inReach Remote

.................................................................. 44

Using the inReach Remote............................................. 44

VIRB Remote....................................................................... 45

Controlling a VIRB Action Camera.................................. 45

Controlling a VIRB Action Camera During an Activity..... 45

Using the Stress Level Widget............................................. 45

Customizing the My Day Widget.......................................... 45

Customizing the Controls Menu................................................45

Watch Face Settings.................................................................45

Customizing the Watch Face............................................... 45

Sensors Settings.......................................................................46

Compass Settings................................................................ 46

Calibrating the Compass Manually................................. 46

Setting the North Reference............................................46

Altimeter Settings................................................................. 46

Calibrating the Barometric Altimeter............................... 46

Barometer Settings.............................................................. 46

Calibrating the Barometer............................................... 46

Xero Laser Location Settings............................................... 46

Map Settings............................................................................. 47

Map Themes........................................................................ 47

Marine Map Settings............................................................ 47

Showing and Hiding Map Data............................................ 47

Navigation Settings................................................................... 47

Customizing Map Features.................................................. 47

Setting Up a Heading Bug................................................... 47

Setting Navigation Alerts......................................................47

Power Manager Settings.......................................................... 47

Customizing the Battery Saver Feature............................... 47

Customizing Power Modes.................................................. 48

Restoring a Power Mode..................................................... 48

System Settings........................................................................ 48

Time Settings....................................................................... 48

Setting Time Alerts.......................................................... 48

Syncing the Time............................................................ 48

Changing the Backlight Settings.......................................... 49

Customizing the Hot Keys....................................................49

Changing the Units of Measure........................................... 49

Viewing Device Information...................................................... 49

Viewing E-label Regulatory and Compliance Information.... 49

Wireless Sensors......................................................... 49

Pairing Your Wireless Sensors................................................. 49

Extended Display Mode............................................................ 49

Using an Optional Bike Speed or Cadence Sensor.................. 49

Training with Power Meters...................................................... 49

Using Electronic Shifters...........................................................49

Situational Awareness.............................................................. 49

Foot Pod................................................................................... 49

Improving Foot Pod Calibration........................................... 50

Calibrating Your Foot Pod Manually.................................... 50

Setting Foot Pod Speed and Distance................................. 50

tempe™.................................................................................... 50

Club Sensors............................................................................ 50

Device Information....................................................... 50

Descent Mk2i Specifications..................................................... 50

Battery Information...............................................................50

Descent T1 Specifications........................................................ 50

Data Management.................................................................... 51

Deleting Files....................................................................... 51

Device Maintenance..................................................... 51

Device Care.............................................................................. 51

Cleaning the Device............................................................. 51

Changing the QuickFit® Bands................................................ 51

Extra Long Diving Band............................................................ 51

Metal Watch Band Adjustment................................................. 51

Table of Contents iii

Descent T1 Device Care...........................................................51

Cleaning the Transmitter......................................................51

User Replaceable Batteries...................................................... 51

Replacing the Descent T1 Battery....................................... 52

Troubleshooting........................................................... 52

My device is in the wrong language......................................... 52

Is my smartphone compatible with my device?........................ 52

My phone will not connect to the device................................... 52

Can I use my Bluetooth sensor with my watch?....................... 52

My headphones will not connect to the device......................... 52

My music cuts out or my headphones do not stay connected.. 52

Restarting Your Device............................................................. 52

Resetting All Default Settings................................................... 53

Diving........................................................................................ 53

Resetting Your Tissue Load.................................................53

Resetting the Surface Pressure........................................... 53

Updating the Transmitter Software Using Your Descent Dive

Computer............................................................................. 53

My transmitter and watch lose connection underwater........ 53

Adjusting the Transmitter Power Setting......................... 53

My transmitter battery is draining rapidly............................. 53

Acquiring Satellite Signals........................................................ 53

Improving GPS Satellite Reception......................................53

The temperature reading is not accurate.................................. 54

Maximizing the Battery Life.......................................................54

Activity Tracking........................................................................54

My daily step count does not appear................................... 54

My step count does not seem accurate............................... 54

The step counts on my device and my Garmin Connect

account don't match............................................................. 54

The floors climbed amount does not seem accurate........... 54

Getting More Information.......................................................... 54

Appendix....................................................................... 54

Data Fields................................................................................54

VO2 Max. Standard Ratings..................................................... 58

FTP Ratings.............................................................................. 59

Wheel Size and Circumference................................................ 59

Symbol Definitions.................................................................... 59

Index.............................................................................. 61

iv Table of Contents

Introduction

WARNING

See the Important Safety and Product Information guide in the

product box for product warnings and other important

information.

Always consult your physician before you begin or modify any

exercise program.

Getting Started

When using your watch the first time, you should complete these

tasks to set it up and get to know the basic features.

Press LIGHT to turn on the watch (Buttons, page 1).

Follow the on-screen instructions to complete the initial

setup.

During the initial setup, you can pair your smartphone with

your watch to receive notifications, sync your activities, and

more (Pairing Your Smartphone, page 2).

Charge the device (Charging the Device, page 2).

Start an activity (Starting an Activity, page 12).

Buttons

LIGHT

• Press to turn the backlight on and off.

• Press to turn the device on.

• Hold to view the controls menu.

NOTE: While diving, hold functions are disabled.

MENU·UP

• Press to scroll through the widget loop and menus.

• Hold to view the menu.

NOTE: You can enable or disable this button for dive

activities (Dive Setup, page 3).

DOWN

• Press to scroll through the widget loop and menus.

• Press to scroll through the data screens during a dive.

• Hold to view the music controls from any screen.

NOTE: While diving, hold functions are disabled.

START·STOP

• Press to view the activity list and start or stop an activity.

• Press to choose an option in a menu.

• Press to view the menu during a dive.

BACK·LAP

• Press to return to the previous screen.

• Press to exit a menu during a dive.

• Press to record a lap, rest, or transition during a multisport

activity.

• Hold to view the watch face from any screen.

• Hold to return to the primary data screen during a dive.

: Double tap the device to scroll through the data screens

during a dive.

Using the Watch

• Hold LIGHT to view the controls menu.

The controls menu provides quick access to frequently used

functions, such as turning on do not disturb mode, saving a

location, and turning the watch off.

• From the watch face, press UP or DOWN to scroll through

the widget loop.

Your watch comes preloaded with widgets that provide at-a-

glance information. More widgets are available when you pair

your watch with a smartphone.

• From the watch face, press START to start an activity or

open an app (Activities and Apps, page 12).

• Hold MENU to customize the watch face, adjust settings, and

pair wireless sensors.

Viewing the Controls Menu

The controls menu contains options, such as turning on do not

disturb mode, locking the keys, and turning the device off. You

can also open the Garmin Pay

™

wallet.

NOTE: You can add, reorder, and remove the options in the

controls menu (Customizing the Controls Menu, page 45).

From any screen, hold LIGHT.

Press UP or DOWN to scroll through the options.

Enabling Airplane Mode

You can enable airplane mode to disable all wireless

communications.

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT.

Select .

Viewing Widgets

Your device comes preloaded with several widgets, and more

are available when you pair your device with a smartphone.

• Press UP or DOWN.

The device scrolls through the widget loop and displays

summary data for each widget.

• Press START to view widget details.

TIP: You can press DOWN to view additional screens for a

widget, or press START to view additional options and

functions for a widget.

• From any screen, hold BACK to return to the watch face.

• If you are recording an activity, press BACK to return to the

activity data pages.

Introduction 1

Customizing the Watch

• From the watch face, hold MENU to change the watch face.

• From the widget screens, hold MENU to customize the

widget options.

• From the controls menu, hold MENU to add, remove, and

reorder the controls.

• From any screen, hold MENU to change additional settings.

Default Watch Face

Alternate time zone pointer. References the 24-hour time markings

on the watch (Adding Alternate Time Zones, page 37).

No-fly time remaining. References the 24-hour time markings on

the watch (No-Fly Time, page 11).

Surface interval (SI) time after a dive.

Pairing Your Smartphone

To use the connected features on your watch, you must pair it

directly through the Garmin Dive

™

app, instead of from the

Bluetooth

settings on your smartphone.

From the app store on your smartphone, install and open the

Garmin Dive app.

Select an option to enable pairing mode on your watch:

• During the initial setup, select Yes when you are prompted

to pair with your smartphone.

• If you previously skipped the pairing process, hold MENU,

and select Pair Phone.

Select an option to add your watch to your account:

• If this is the first time you are pairing a device with the

Garmin Dive app, follow the on-screen instructions.

• If you already paired another device with the Garmin Dive

app, select Add > Devices, and follow the on-screen

instructions.

Charging the Device

WARNING

This device contains a lithium-ion battery. See the Important

Safety and Product Information guide in the product box for

product warnings and other important information.

NOTICE

To prevent corrosion, thoroughly clean and dry the contacts and

the surrounding area before charging or connecting to a

computer. Refer to the cleaning instructions (Device Care,

page 51).

Pinch the sides of the charging clip.

Align the clip with the contacts on the back of the device, and

release the clip.

Plug the USB cable into a USB charging port.

Product Updates

On your computer, install Garmin Express

™

(www.garmin.com

/express). On your smartphone, install the Garmin Dive app.

This provides easy access to these services for Garmin

devices:

• Software updates

• Map updates

• Course updates

• Data uploads to Garmin Dive

• Product registration

Setting Up Garmin Express

Connect the device to your computer using a USB cable.

Go to www.garmin.com/express.

Follow the on-screen instructions.

Diving

Dive Warnings

WARNING

• The diving features of this device are for use by certified

divers only. This device should not be used as a sole dive

computer. Failure to input the appropriate dive-related

information into the device can lead to serious personal injury

or death.

• Make sure that you fully understand the use, displays, and

limitations of your device. If you have questions about this

manual or the device, always resolve any discrepancies or

confusion before diving with the device. Always remember

that you are responsible for your own safety.

• There is always a risk of decompression sickness (DCS) for

any dive profile even if you follow the dive plan provided by

the dive tables or a diving device. No procedure, diving

device, or dive table will eliminate the possibility of DCS or

oxygen toxicity. An individual's physiological make up can

vary from day to day. This device cannot account for these

variations. You are strongly advised to remain well within the

limits provided by this device to minimize the risk of DCS.

You should consult a physician regarding your fitness before

diving.

• The dive computer can calculate your surface air

consumption rate (SAC) and air time remaining (ATR). These

calculations are an estimate and should not be relied on as

the only source of information.

• Always use backup instruments, including a depth gauge,

submersible pressure gauge, and timer or watch. You should

have access to decompression tables when diving with this

device.

• Perform pre-dive safety checks, such as checking proper

device function and settings, display function, battery level,

tank pressure, and bubble checks to check hoses for leaks.

• If a tank pressure warning or battery warning appears on the

dive computer, terminate the dive immediately and safely

return to the surface. Disregarding the alarm may result in

serious injury or death.

• This device should not be shared between multiple users for

diving purposes. Diver profiles are user specific, and using

another diver's profile can result in misleading information

that could lead to injury or death.

• For safety reasons, you should never dive alone. Dive with a

designated buddy. You should also stay with others for an

extended time after a dive, because the potential onset of

2 Diving

decompression sickness (DCS) may be delayed or triggered

by surface activities.

• This device is not intended for commercial or professional

dive activities. It is for recreational purposes only.

Commercial or professional dive activities can expose the

user to extreme depths or conditions that increase the risk of

DCS.

• Do not dive with a gas if you have not personally verified its

contents and input the analyzed value to the device. Failure

to verify tank contents and input the appropriate gas values

to the device will result in incorrect dive planning information

and could result in serious injury or death.

• Diving with more than one gas mixture presents a much

greater risk than diving with a single gas mixture. Mistakes

related to the use of multiple gas mixtures may lead to

serious injury or death.

• The transmitter is not an oxygen cleaned product. Do not use

the transmitter with anything greater than 40% oxygen.

• Always ensure a safe ascent. A rapid ascent increases the

risk of DCS.

• Disabling the deco lockout feature on the device can result in

an increased risk of DCS, which can result in personal injury

or death. Disable this feature at your own risk.

• Violating a required decompression stop may result in

serious injury or death. Never ascend above the displayed

decompression stop depth.

• Always perform a safety stop between 3 and 5 meters (9.8

and 16.4 feet) for 3 minutes, even if no decompression stop

is required.

Dive Modes

The Descent Mk2i device supports six dive modes. Each dive

mode has four phases: dive pre-check, surface display, in-dive,

and post-dive.

Single-Gas: This mode allows you to dive with a single gas

blend. You can set up to 11 additional gases as backup

gases.

Multi-Gas: This mode allows you to configure multiple gas

blends and switch gases during your dive. You can set the

oxygen content from 5–100%. This mode supports one

bottom gas, and up to 11 additional gases as decompression

or backup gases.

NOTE: Backup gases are not used in no-decompression limit

(NDL) and time to surface (TTS) decompression calculations

until you activate them during a dive.

CCR: This mode for closed-circuit rebreather (CCR) diving

allows you to configure two partial pressure of oxygen (PO2)

setpoints, closed-circuit (CC) diluent gases, and open-circuit

(OC) decompression and backup gases.

Gauge: This mode allows you to dive with basic bottom timer

features.

NOTE: After diving in gauge mode, the device can only be

used in gauge or apnea mode for 24 hours.

Apnea: This mode allows you to free dive with apnea-specific

dive data. This mode has a higher data refresh rate.

Apnea Hunt: This mode is similar to the Apnea dive mode, but

tuned specifically for spearfishers. This mode displays

simplified in-dive data, and disables start and stop tones.

Using the Pool Dive Mode

When the device is in pool dive mode, the tissue load and

decompression lockout features function normally, but dives are

not saved to the dive log.

Hold LIGHT to view the controls menu.

Select .

The pool dive mode turns off automatically at midnight.

Dive Setup

You can customize the dive settings based on your needs. Not

all settings are applicable for all dive modes. You can also edit

the settings before you start a dive.

Hold MENU, and select Dive Setup.

Gases: Sets the gas blends used in the gas dive modes (Setting

Up Your Breathing Gases, page 3). You can have up to

twelve gases for each gas dive mode.

Conservatism: Sets the level of conservatism for

decompression calculations. Higher conservatism provides a

shorter bottom time and a longer ascent time. The Custom

option allows you to set a custom gradient factor.

NOTE: Make sure you understand gradient factors before

entering a custom level of conservatism.

Air Integration: Allows you to pair Descent T1 devices and

configure the data screens (Air Integration, page 4).

Water Type: Allows you to select the water type.

PO2: Sets the partial pressure of oxygen (PO2) thresholds, in

bar, for decompression, warnings, and critical alerts (Setting

PO2 Thresholds, page 4).

Alerts: Allows you to set tone, vibration, or silent alerts for depth

and time. You can enable different alerts for different dive

modes.

Apnea Surf. Alert: Allows you to set alerts for apnea surface

intervals.

Safety Stop: Allows you to change the safety stop duration.

End Dive Delay: Allows you to set the length of time before the

device ends and saves a dive after surfacing.

CCR Setpoints: Allows you to set high and low PO2 setpoints

for closed-circuit rebreather (CCR) dives (Setting CCR

Setpoints, page 4).

Backlight: Allows you to adjust the backlight settings for dive

activities. You can enable the backlight throughout the dive or

only when you are at depth.

Heart Rate: Allows you to enable or disable a heart rate monitor

for dives. The Stored Strap Data option allows you enable a

chest heart rate monitor, such as the HRM-Swim

™

HRM-Tri

™

device, that stores heart rate data with the dive.

You can view chest heart rate monitor data in the Garmin

Dive app after you complete the dive.

Double Tap to Scroll: Allows you to double tap the device to

scroll through the dive data screens. If you notice accidental

scrolling, you can use the Sensitivity option to adjust the

responsiveness.

UP Key: Allows you to disable the UP button during dive

activities to prevent inadvertent button presses.

NOTE: This setting is disabled by default.

Deco Lockout: Allows you to disable the decompression

lockout feature. This feature prevents single-gas and multi-

gas dives for 24 hours if you violate a decompression ceiling

for more than three minutes.

NOTE: You can still disable the decompression lockout

feature after violating a decompression ceiling.

Setting Up Your Breathing Gases

You can enter up to twelve gases for each gas dive mode.

Decompression calculations include your decompression gases,

but do not include your backup gases.

Hold MENU.

Select Dive Setup > Gases.

Select a dive mode.

Select the first gas in the list.

Diving 3

For single-gas or multi-gas dive modes, this is the bottom

gas. For the closed-circuit rebreather (CCR) dive mode, this

is the diluent gas.

Select Oxygen, and enter the oxygen percentage of the gas

blend.

Select Helium, and enter the helium percentage of the gas

blend.

The device calculates the remaining percentage as the

nitrogen content.

Press BACK.

Select an option:

NOTE: Not all options are available for all dive modes.

• Select Add Backup, and enter the oxygen and helium

percentage for your backup gas.

• Select Add New, enter the oxygen and helium

percentage, and select Mode to set the intended use for

the gas, such as decompression or backup.

NOTE: For the multi-gas dive mode, you can select Set as

Travel Gas to set a decompression gas as your intended

gas for descending.

Setting PO2 Thresholds

You can configure the partial pressure of oxygen (PO2)

thresholds, in bars, for decompression, warning, and critical

alerts.

Hold MENU.

Select Dive Setup > PO2.

Select an option:

• Select Deco PO2 to set the threshold that you can reach

before you should begin your ascent and switch to the

decompression gas with the highest percentage of

oxygen.

NOTE: The device does not switch gases for you

automatically. You must select the gas.

• Select PO2 Warning to set the threshold for the highest

oxygen concentration level that you are comfortable

reaching.

• Select PO2 Critical to set the threshold for the maximum

oxygen concentration level that you should reach.

Enter a value.

If you reach a threshold value during a dive, the device displays

an alert message.

Setting CCR Setpoints

You can configure the high and low partial pressure of oxygen

(PO2) setpoints for closed-circuit rebreather (CCR) dives.

Hold MENU.

Select Dive Setup > CCR Setpoints.

Select an option:

• To configure the lower PO2 setpoint, select Low Setpoint.

• To configure the upper PO2 setpoint, select High

Setpoint.

Select Mode.

Select an option:

• To automatically change the setpoint based on your

current depth, select Auto.

NOTE: For example, if you descend through the high

setpoint depth or ascend through the low setpoint depth,

the PO2 threshold switches to the high or low setpoint,

respectively. Automatic setpoint depths must be at least

6.1 m (20 ft.) apart.

• To manually change setpoints during a dive, select

Manual.

NOTE: If you manually change setpoints within 1.8 m (6

ft.) of an automatic switch depth, then automatic setpoint

switching is disabled until you are more than 1.8 m (6 ft.)

above or below the automatic switch depth. This prevents

unintended setpoint switching.

Select PO2, and enter a value.

Air Integration

The Descent Mk2i dive computer can be used with a paired

Descent T1 transmitter to view tank pressure, estimated air time

remaining, and estimated gas consumption. You can also view

the tank pressure and battery status for up to four other divers in

your group.

Installation and Setup

CAUTION

To ensure proper setup and best performance, it is strongly

recommended that you complete the first time installation and

setup at a dive shop. You should fully test the transmitter

installation above and below water before using it during a dive.

Transmitter Position Tips

The transmitter communicates wirelessly with your compatible

dive computer. On the surface, it uses ANT

technology.

Underwater, it uses a sonar signal. Your body, drysuit, and dive

equipment can obstruct the signal, particularly while underwater.

For the best reception, all transmitters in your group should have

clear lines of sight to the dive computer. To help prevent

blocking the signal with your body or equipment, you should

follow these tips.

• You should install the transmitter at least 7 cm (3 in.) from

your body.

• You should install the transmitter on the same side of the

tank as the wrist wearing your dive computer. For example, if

you wear your dive computer on your left wrist, you should

install the transmitter on the left side of the tank regulator.

• For the best reception, you should wear the tank high on your

back. This allows the transmitter to have a clear line of sight

over your shoulders.

• If you wear your tank inverted with the regulator at the

bottom, you can use a high-pressure hose to relocate the

transmitter to have a clear line of sight over your shoulders.

• If you lose the signal from your transmitter, you should move

your arm until the signal is restored.

• If you lose the signal from another diver, you should change

your body position until the signal is restored. If your body is

between the dive computer and another diver, it may obstruct

the signal from that diver's transmitter.

4 Diving

Installing the Transmitter on Your Tank Regulator

WARNING

Always use the pre-installed flow restrictor when using the

transmitter directly attached to your regulator. Always use the

included air spool when connecting the transmitter to a high

pressure hose extension (Installing the Transmitter on a High

Pressure Hose Extension, page 5). Using the transmitter

without either the flow restrictor or air spool could result in

serious injury or death from an air pressurization failure.

Before you install the transmitter on your tank regulator, you

should read the transmitter position tips and choose the port

position that provides the best line of sight to the dive computer.

To install the transmitter, you need a

in. (16 mm) open-ended

wrench.

The transmitter connects to a high pressure output port of the

first-stage regulator.

Confirm the regulator is depressurized and detached from a

scuba cylinder.

Remove the port plug from the high pressure output port of

the first-stage regulator.

Confirm the flow restrictor is installed in the transmitter.

Screw the transmitter onto the high pressure output port until

you feel resistance.

WARNING

Verify the installed transmitter does not physically interfere

with any hoses or other tank assemblies.

Use a

in. (16 mm) wrench to tighten the transmitter.

NOTICE

To prevent damage to the transmitter and possible loss of

function, do not overtighten. Do not use the transmitter

housing to tighten or loosen the transmitter.

Do not grip the regulator or the transmitter to move, carry, or

adjust the tank.

Installing the Transmitter on a High Pressure Hose

Extension

WARNING

Always use the pre-installed flow restrictor when using the

transmitter directly attached to your regulator (Installing the

Transmitter on Your Tank Regulator, page 5). Always use the

included air spool when connecting the transmitter to a high

pressure hose extension. Using the transmitter without either the

flow restrictor or air spool could result in serious injury or death

from an air pressurization failure.

Before you install the transmitter on a high pressure hose

extension certified to the EN 250:2014 standard, you should

read the transmitter position tips and choose a position that

provides the best line of sight to the dive computer.

To install the transmitter, you need two

in. (16 mm) open-

ended wrenches and a small flat screwdriver or flat-nose pliers.

The transmitter can connect to a high pressure hose extension

from the high pressure output port of the first-stage regulator.

Use a screwdriver or pliers to carefully remove the flow

restrictor from the transmitter.

NOTICE

Use care when removing the flow restrictor to avoid

damaging the device.

Insert the large end of the air spool into the transmitter.

Confirm the regulator is depressurized and detached from a

scuba cylinder.

Remove the port plug from the high pressure output port of

the first-stage regulator.

Connect a high pressure hose extension to the high pressure

output port of the first-stage regulator.

Screw the transmitter onto the high pressure hose extension

until you feel resistance.

Diving 5

WARNING

Verify the installed transmitter does not physically interfere

with any hoses or other tank assemblies.

Use two

in. (16 mm) wrenches to tighten the transmitter,

placing one wrench on the transmitter and one wrench on the

hose fitting.

NOTICE

To prevent damage to the transmitter and possible loss of

function, do not overtighten. Do not use the transmitter

housing to tighten or loosen the transmitter.

Do not grip the regulator or the transmitter to move, carry, or

adjust the tank.

Ensure the connection between the transmitter and hose

fitting is secure before using the device.

You must remove the air spool and reinstall the flow restrictor

before installing the transmitter on your tank regulator.

Pairing the Transmitter with a Descent Mk2i Dive

Computer

To pair the transmitter, you must have a pressurized tank and

regulator.

The Descent T1 can transmit air pressure data to a Descent

Mk2i dive computer.

Before you use the transmitter for the first time, you must pair it

with the dive computer. Out of the box, the transmitter is in low

power mode. You must wake the device from low power mode

to complete the pairing process.

NOTE: If a transmitter was packaged with your dive computer,

they are already paired.

Install the transmitter on the first-stage regulator (Installing

the Transmitter on Your Tank Regulator, page 5).

Gradually open the tank valve to pressurize the first-stage

regulator.

When the transmitter detects pressure, it wakes from low

power mode. The transmitter plays a tone when it wakes

from low power mode and is ready to pair.

On the Descent Mk2i dive computer, hold MENU, and select

Dive Setup > Air Integration > Transmitters > Add New.

The dive computer starts searching and displays a list of

nearby transmitters.

From the list of transmitters, select the transmitter ID you

want to pair.

The transmitter ID is printed on the housing.

When the pairing process is complete, Connected appears on

the dive computer screen. The transmitter begins sending tank

pressure data, and it is ready to use on a dive. The next time the

transmitter and dive computer are turned on and within wireless

range, they connect automatically when you start a dive.

If you are diving with a group, you can pair up to 5 Descent T1

transmitters with the dive computer.

Selecting Paired Transmitters to View on Your Dive Data

Screens

You can view two paired transmitters at-a-glance on the primary

dive data screen. You can customize which paired transmitters

appear on the screen. By default, the first and second

transmitters that you pair appear.

Hold MENU.

Select Dive Setup > Air Integration > Display Setup.

Select a field to customize.

Select a paired transmitter.

Transmitter Settings

You can customize the settings for paired transmitters prior to a

dive.

On the paired Descent dive computer, hold MENU, select Dive

Setup > Air Integration > Transmitters, and select a

transmitter.

Status: Enables a connection to the transmitter, and shows

current connection status.

Identify: Plays a tone on the selected paired transmitter. This

helps you to identify the transmitter without needing to look at

the transmitter ID printed on the transmitter housing.

Units: Sets the pressure units for your tank. The device defaults

to psi if your depth setting is in feet, and bar if your depth

setting is in meters.

Working Pressure: Sets how much pressure the tank has when

full. This value is used to determine the upper end of the

pressure gauge, and to calculate respiratory minute volume

(RMV) for tanks using psi units.

Reserve Pressure: Sets the threshold values for reserve

pressure and critical pressure alerts to appear on the dive

computer.

Volume: Allows you to enter the air volume of the tank. You can

use the Reset Volume option if you move the transmitter to a

different size tank.

NOTE: This value is required to calculate volumetric surface

air consumption (SAC) and respiratory minute volume (RMV)

(Selecting the Gas Consumption Rate Metric, page 7).

SAC/RMV/ATR: Enables the transmitter to be included in

volumetric surface air consumption (SAC), respiratory minute

volume (RMV), and air time remaining (ATR) estimates

(Including Transmitters in Gas Consumption Calculations,

page 7).

Set Transmit Power: Allows you to adjust the power setting if

your transmitter is losing connection with the paired dive

computer underwater.

About: Displays the transmitter ID, software version, and battery

status.

Name: Allows you to enter an easily identifiable name for the

transmitter.

Remove: Allows you to remove a paired transmitter.

6 Diving

Selecting the Gas Consumption Rate Metric

Hold MENU.

Select Dive Setup > Air Integration > Display Setup > Gas

Consumption Rate.

Select an option.

NOTE: The dive computer can estimate volumetric surface

air consumption (SAC) or respiratory minute volume (RMV)

only if the air volume of the tank is entered in the dive

computer (Transmitter Settings, page 6). The dive computer

can estimate pressure-based surface air consumption

(PSAC) with or without the air volume of the tank.

Including Transmitters in Gas Consumption

Calculations

Gas consumption and air time remaining estimates are

calculated using the tank pressure from the included

transmitters. By default, the first transmitter that you pair with

your compatible dive computer is included. You can include

additional paired transmitters in gas consumption calculations.

Hold MENU.

Select Dive Setup > Air Integration > Transmitters.

Select a paired transmitter.

Select the SAC/RMV/ATR toggle switch to include the

transmitter in gas consumption calculations.

If necessary, repeat steps 2 through 4 to include additional

paired transmitters in gas consumption calculations.

Dive Data Screens

You can press DOWN or double-tap the device to scroll through

the data screens.

In the activity settings, you can reorder the default data screens,

add a dive stopwatch, and add custom data screens

(Customizing the Data Screens, page 41). You can customize

the data fields on some of the data screens.

Single-Gas and Multi-Gas Data Screens

Primary data screen: Displays the main dive data, including

your breathing gas and rate of ascent or decent.

Your partial pressure of oxygen (PO2) level.

Your nitrogen (N2) and helium (He) tissue load level.

Green: 0 to 79% tissue load.

Yellow: 80 to 99% tissue load.

Red: 100% or greater tissue load.

Your rate of descent or ascent.

Green: Good. Ascent is less than 7.9 m (26 ft.) per min.

Yellow: Moderately high. Ascent is between 7.9 and 10.1 m

(26 and 33 ft.) per min.

Red: Too high. Ascent is greater than 10.1 m (33 ft.) per

min.

Dive compass: Allows you to view the compass and set a

directional heading to aid with underwater navigation

(Navigating with the Dive Compass, page 8).

Customizable data screen: Displays additional dive data and

physiological information, including the time of day, battery

level, and your heart rate. You can edit the gauges and the

first five data fields (Customizing the Data Screens,

page 41).

The time to surface (TTS) decompression calculation.

Transmitters data screen: Displays information about paired

Descent T1 transmitters (Viewing the Transmitter Data

Screens, page 9).

CCR Data Screens

Primary data screen: Displays the main dive data, including

your breathing gas and rate of ascent or decent.

Indicates whether closed-circuit (CC) or open-circuit (OC) diving

is active.

Your partial pressure of oxygen (PO2) level.

Your nitrogen (N2) and helium (He) tissue load level.

Green: 0 to 79% tissue load.

Yellow: 80 to 99% tissue load.

Red: 100% or greater tissue load.

Your rate of descent or ascent.

Green: Good. Ascent is less than 7.9 m (26 ft.) per min.

Yellow: Moderately high. Ascent is between 7.9 and 10.1 m

(26 and 33 ft.) per min.

Red: Too high. Ascent is greater than 10.1 m (33 ft.) per

min.

Dive compass: Allows you to view the compass and set a

directional heading to aid with underwater navigation

(Navigating with the Dive Compass, page 8).

Customizable data screen: Displays additional dive data and

physiological information, including the time of day and

battery level. You can edit the gauges and the first five data

fields (Customizing the Data Screens, page 41).

The time to surface (TTS) decompression calculation.

Your central nervous system (CNS) oxygen toxicity level.

Green: 0 to 79% CNS oxygen toxicity.

Yellow: 80 to 99% CNS oxygen toxicity.

Red: 100% or greater CNS oxygen toxicity.

Your current oxygen toxicity units (OTU).

Green: 0 to 249 OTU.

Yellow: 250 to 299 OTU.

Red: 300 or greater OTU.

Transmitters data screen: Displays information about paired

Descent T1 transmitters (Viewing the Transmitter Data

Screens, page 9).

Diving 7

Gauge Data Screens

Dive stopwatch: Displays the bottom time stopwatch; current,

maximum, and average depth; and rate of ascent or decent

(Using the Dive Stopwatch, page 8).

Dive compass: Allows you to view the compass and set a

directional heading to aid with underwater navigation

(Navigating with the Dive Compass, page 8).

Customizable data screen: Displays additional dive data and

physiological information, including the time of day, battery

level, and your heart rate. You can edit the gauges and the

first five data fields (Customizing the Data Screens,

page 41).

Transmitters data screen: Displays information about paired

Descent T1 transmitters (Viewing the Transmitter Data

Screens, page 9).

Apnea and Apnea Hunt Data Screens

Surface interval screen: Displays the current surface interval

time, as well as the elapsed time, maximum depth, and

temperature for your last apnea dive.

Time of day screen: Displays the time of day and your heart

rate data.

Map: Displays your current location on the map (Diving with the

Map, page 10).

In-dive screen: Displays the information about the current dive,

including the elapsed time, current and maximum depth,

heart rate data, and rate ascent or descent.

Starting a Dive

From the watch face, press START.

Select a dive mode (Dive Modes, page 3).

If necessary, press DOWN to edit the dive settings, such as

the gases, water type, and alerts (Dive Setup, page 3).

Wait with your wrist out of the water until the device acquires

GPS signals and the status bar turns green (optional).

The device requires GPS signals to save your dive entry

location.

Press START until the primary dive data screen appears.

Descend to start your dive.

The activity timer starts automatically when you reach a

depth of 1.2 m (4 ft.).

NOTE: If you start a dive without selecting a dive mode, the

device uses the most recently used dive mode and settings.

Select an option:

• Press DOWN to scroll through the data screens and dive

compass.

TIP: You can also double tap the device to scroll through

the screens.

• Press START to view the in-dive menu.

When you ascend to 1 m (3.3 ft.), the End Dive Delay timer

begins counting down (Dive Setup, page 3). When the timer

elapses, the device automatically ends and saves the dive. You

should keep your wrist out of the water while the device saves

your dive exit location.

Navigating with the Dive Compass

During a single-gas, multi-gas, closed-circuit rebreather, or

gauge dive, scroll to the dive compass.

The compass indicates your directional heading .

Press START to set the heading.

The compass indicates deviations from the set heading .

Press START, and select an option:

• To reset the heading, select Reset Heading.

• To change the heading by 180 degrees, select Set to

Recip..

NOTE: The compass indicates the reciprocal heading with

a red mark.

• To set to a 90-degree heading left or right, select Set to

90L or Set to 90R.

• To clear the heading, select Clear Heading.

Using the Dive Stopwatch

TIP: You can add a simplified stopwatch screen to any of the

gas dive modes (Customizing the Data Screens, page 41).

Start a Gauge dive.

Scroll to the stopwatch screen.

8 Diving

Press START, and select Reset Avg. Depth to set the

average depth to your current depth.

Press START, and select Start Stopwatch.

Select an option:

• To stop using the stopwatch, press START, and select

Stop Stopwatch.

• To restart the stopwatch, press START, and select Reset

Stopwatch.

Viewing the Transmitter Data Screens

Press DOWN to view the transmitter data screen.

The gas consumption estimate for the selected transmitters.

NOTE: You can customize the transmitters used for gas

calculations (Including Transmitters in Gas Consumption

Calculations, page 7).

The air time remaining (ATR) estimate for the selected

transmitters.

Your primary and secondary transmitters and their tank

pressure values.

NOTE: You can customize which transmitters are displayed

(Selecting Paired Transmitters to View on Your Dive Data

Screens, page 6).

From the transmitter data screen, press START to view

additional paired transmitters in the network.

Switching Gases During a Dive

Start a single-gas, multi-gas, or closed-circuit rebreather

(CCR) dive.

Select an option:

• Press START, select Gas, and select a backup or

decompression gas.

NOTE: If necessary, you can select Add New and enter a

new gas.

• Dive until you reach the Deco PO2 threshold (Setting PO2

Thresholds, page 4).

The device prompts you to switch to the gas with the

highest percentage of oxygen.

NOTE: The device does not switch gases for you

automatically. You must select the gas.

Switching Between CC and OC Diving for a Bailout

Procedure

During a closed-circuit rebreather (CCR) dive, you can switch

between closed-circuit (CC) and open-circuit (OC) diving while

you perform a bailout procedure.

Start a CCR dive.

Press START.

Select Switch to OC.

The dividing lines on the data screens turn red, and the

device switches the active breathing gas to your OC

decompression gas.

NOTE: If you have not set up an OC decompression gas, the

device switches to your diluent gas.

If necessary, press START, and select Gas to manually

switch to a backup gas.

Press START, and select Switch to CC to switch back to CC

diving.

Performing a Safety Stop

You should perform a safety stop during every dive to help

reduce the risk of decompression sickness.

After a dive of at least 11 m (35 ft.), ascend to 5 m (15 ft.).

Safety stop information appears on the data screens.

Your depth relative to the surface.

As you ascend, your position moves upward toward the safety

stop depth .

The safety stop ceiling depth.

The safety stop timer.

When you are within 1 m (5 ft.) of the ceiling depth, the timer

starts counting down.

Stay within 2 m (8 ft.) of the safety stop ceiling depth until the

safety stop timer reaches zero.

NOTE: If you ascend more than 3 m (8 ft.) above the safety

stop ceiling depth, the safety stop timer pauses, and the

device alerts you to descend below the ceiling depth. If you

descend below 11 m (35 ft.), the safety stop timer resets.

Continue ascending to the surface.

Performing a Decompression Stop

You should always perform all the required decompression

stops during a dive to help reduce the risk of decompression

sickness. Missing a decompression stop adds significant risk.

When you exceed the no-decompression limit (NDL) time,

begin your ascent.

Decompression stop information appears on the data

screens.

Diving 9

Your depth relative to the surface.

As you ascend, your position moves upward toward the required

decompression stop depth .

The empty segments represent cleared stops. You may

clear a stop before ascending to it.

The decompression stop ceiling depth.

The decompression stop timer.

Stay within 0.6 m (2 ft.) of the decompression stop ceiling

depth until the decompression stop timer reaches zero.

NOTE: If you ascend more than 0.6 m (2 ft.) above the

decompression stop ceiling depth, the decompression stop

timer pauses, and the device alerts you to descend below the

ceiling depth. The depth and ceiling depth flash red until you

are within the safe margin.

Continue ascending to the surface.

Diving with the Map

You can view your dive entry and exit locations on the map

during apnea surface intervals.

TIP: You can view map data for all dive modes in the dive log

widget and in the Garmin Dive app.

During an apnea dive activity, scroll to the map.

Press START, and select an option:

• To pan or zoom the map, select Pan/Zoom.

TIP: You can press START to toggle between panning up

and down, panning left and right, or zooming. You can

hold START to select the point indicated by the

crosshairs.

• To mark your location, select Save Location.

TIP: You can press DOWN to change the icon.

Viewing the Surface Interval Widget

The widget displays your surface interval time, tissue load, and

central nervous system (CNS) oxygen toxicity percentage.

From the watch face, press UP or DOWN to view the surface

interval widget.

Press START to view your oxygen toxicity units (OTU) and

CNS percentage.

NOTE: The OTU accumulated during a dive expire after 24

hours.

Press DOWN to view your tissue load details.

Viewing the Dive Log Widget

The widget displays summaries of your recently recorded dives.

From the watch face, press UP or DOWN to view the dive log

widget.

Press START to view your most recent dive.

Select an option:

• Press START to view more details.

• Press DOWN > START to view a different dive.

Press DOWN.

Select an option:

• To view additional information about the activity, select All

Stats.

• To view additional information about one of multiple apnea

dives in the activity, select Dives, and select a dive.

• To view the activity on a map, select Map.

NOTE: The device shows your entry and exit locations if

you waited for GPS signals before and after the dive.

• To save a dive entry or exit location, select Save

Location.

• To view the depth profile of the activity, select Depth

Profile.

• To view the temperature profile of the activity, select

Temperature Profile.

• To view the gases you used, select Gas Switches.

Dive Planning

You can plan for future dives using your device. The device can

calculate no-decompression limit (NDL) times or create

decompression plans. When planning a dive, the device uses

your residual tissue load from recent dives in the calculations.

Calculating NDL Time

You can calculate the no-decompression limit (NDL) time or

maximum depth for a future dive. These calculations are not

saved or applied to your next dive.

Press START.

Select Plan Dive > Compute NDL.

Select an option:

• To calculate NDL based on your current tissue load, select

Diving Now.

• To calculate NDL based on your tissue load at a future

time, select Enter Surf. Interval, and enter your surface

interval time.

Enter an oxygen percentage.

Select an option:

• To calculate the NDL time, select Enter Depth, and enter

the planned depth for your dive.

• To calculate the maximum depth, select Enter Time, and

enter your planned dive time.

The NDL countdown clock, depth, and maximum operating

depth (MOD) appear.

Press DOWN.

Select an option:

• To exit, select Done.

• To add intervals to your dive, select Add Repeat Dive,

and follow the on-screen instructions.

Creating a Decompression Plan

You can create open-circuit decompression plans and save

them for future dives.

Press START.

Select Plan Dive > Deco Plans > Add New.

Enter a name for the decompression plan.

Select an option:

• To enter the maximum partial pressure of oxygen in bars,

select PO2.

NOTE: The device uses the PO2 value for gas switching.

• To enter your level of conservatism for decompression

calculations, select Conservatism.

• To enter your gas blends, select Gases.

• To enter the maximum dive depth, select Bottom Depth.

• To enter the time at the bottom depth, select Bottom

Time.

Select Save.

10 Diving

Viewing and Applying a Decompression Plan

You can replace the current single-gas or multi-gas dive settings

with the settings from a decompression plan.

Press START.

Select Plan Dive > Deco Plans.

Select a decompression plan.

If necessary, select View to view the decompression plan,

then press BACK.

Select Apply to use the decompression plan settings for the

single-gas or multi-gas dive mode.

Editing a Decompression Plan

Press START.

Select Plan Dive > Deco Plans.

Select a decompression plan.

Select an option:

• To change the decompression plan details, select Edit.

• To edit the name of the decompression plan, select

Rename.

Edit the information.

Deleting a Decompression Plan

Press START.

Select Plan Dive > Deco Plans.

Select a decompression plan.

Select Delete > Yes.

No-Fly Time

After a dive, appears on the default watch face, along with a

no-fly time estimate in hours (Default Watch Face, page 2). You

should not fly in an airplane during this time. The default no-fly

time after a dive is 24 hours. After a gauge dive or a dive that

violated the decompression plan, the no-fly time is set to 48

hours.

TIP: You can add the no-fly indicator to a custom watch face

(Customizing the Watch Face, page 45).

Altitude Diving

At higher altitudes, the atmospheric pressure is lower, and your

body contains a larger amount of nitrogen than it would at the

start of a dive at sea level. The device accounts for altitude

changes automatically using the barometric pressure sensor.

The absolute pressure value used by the decompression model

is not affected by the altitude or the gauge pressure displayed

on the watch.

Tips for Wearing the Device with an

Exposure Suit

• Use the extra long silicone diving band to wear the device

over a thick exposure suit.

• Use the extension on the titanium watch band to increase

the length of the band.

• For accurate heart rate measurements, make sure that the

device stays in contact with your skin and does not bump into

other wrist-worn devices (Wearing the Device, page 23).

• If you are wearing the device over an exposure suit, turn off

the wrist-based heart rate monitor to increase battery life

(Turning Off the Wrist-based Heart Rate Monitor, page 24).

Dive Alerts

Alert Message Cause Device Action

None You completed the

decompression stop.

The decompression stop

depth and time flash

blue for five seconds.

None Your partial pressure of

oxygen (PO2) value is

above the specified

warning value.

Your PO2 value flashes

yellow.

%1 OTU

accumulated. End

your dive now.

Your oxygen toxicity

units are above the

safe limit. During a

dive, "%1" is replaced

with the number of

units accumulated.

The alert appears every

two minutes, up to three

times.

250 OTU

accumulated.

Your oxygen toxicity

units (OTU) are at 80%

of the safe limit (250

units).

None

Approaching Deco

Stop

You are within one stop

interval (3 m or 9.8 ft.)

of the decompression

stop depth.

None

Approaching NDL You are at 80% of your

tissue load.

None

Ascending too fast.

Slow your ascent.

You are ascending

faster than 9.1 m/min.

(30 ft./min.) for more

than 5 seconds.

None

Battery critically

low. End your dive

now.

Less than 10% battery

power remains.

The alert appears when

the device is below 10%

battery power and on the

dive pre-check screen

for your next dive.

Battery is low. Less than 20% battery

power remains.

The alert appears when

the device is below 20%

battery power and on the

dive pre-check screen

for your next dive.

CNS toxicity at

%1%. End your

dive now.

Your CNS oxygen

toxicity is too high.

During a dive, "%1" is

replaced with your

current CNS

percentage.

The alert appears every

two minutes, up to three

times.

CNS toxicity at

80%.

Your central nervous

system (CNS) oxygen

toxicity is at 80% of the

safe limit.

The alert appears during

a dive and on the dive

pre-check screen for

your next dive.

Decompression

Cleared

You completed all

decompression stops.

None

Descend below

deco ceiling.

You are more than

0.6 m (2 ft.) above the

decompression ceiling.

The current depth and

stop depth flash red.

If you remain above the

decompression ceiling

for more than three

minutes, the

decompression lockout

feature goes into effect.

Descend to

complete safety

stop.

You are more than 2 m

(8 ft.) above the safety

stop ceiling.

The current depth and

stop depth flash yellow.

Diving 11

Alert Message Cause Device Action

Failed to read depth

sensor. End your

dive now.

The device has no

depth sensor data.

Use a backup dive

computer or dive plan

and end your dive. Call

Garmin Product Support.

NDL exceeded.

Decompression

now required.

You have exceeded

your no decompression

limit (NDL) time.

None

PO2 is high.

Ascend or switch to

lower O2 gas.

Your PO2 value is

above the specified

critical value.

Your PO2 value flashes

red.

The alert appears every

30 seconds, up to three

times, until you ascend

to a safe level or switch

gases.

PO2 is low.

Descend or switch

to higher O2 gas.

Your PO2 value is

below 0.18 bar.

If you are within the first

two minutes of your dive,

your PO2 value flashes

yellow. Otherwise, your

PO2 value flashes red.

The alert appears every

30 seconds, up to three

times, until you descend

to a safe level or switch

gases.

Safe to switch to

%1. Switch now?

In a multi-gas dive, a

gas with a higher

oxygen content is now

safe to breathe.

You can switch gases

now, or wait to switch

gases later in the dive.

Safety Stop

Cleared

You completed the

safety stop.

None

This pool dive will

not be saved to the

dive log.

The device is in pool

dive mode.

The device will not save

the current dive to the

dive log.

Transmitter Alerts

Alert

Message

Cause Device Action

None Your paired dive computer

has lost communication

with the transmitter for 30

seconds.

The tank pressure value

flashes yellow.

%1 is below

reserve

pressure.

Your tank pressure is below

the reserve pressure level.

"%1" is replaced with the

transmitter name.

The tank pressure value

turns yellow.

The paired dive computer

vibrates and plays a

warning tone.

%1 pressure

is critically

low.

Your tank pressure is below

the critical pressure level.

"%1" is replaced with the

transmitter name.

The tank pressure value

flashes red.

The paired dive computer

vibrates and plays a

warning tone.

%1 has a

low battery.

Fewer than 20 hours of dive

time remain. "%1" is

replaced with the

transmitter name.

The transmitter name

flashes BATT. LOW when

the battery is critically low.

The paired dive computer

vibrates and plays a

warning tone.

NO COMMS Your paired dive computer

has lost communication

with the transmitter for 60

seconds.

The transmitter name

flashes NO COMMS,

dashed lines replace the

tank pressure value, and

the tank pressure value

flashes red.

The paired dive computer

vibrates and plays a

warning tone if connection

alerts are enabled.

Enabling Lost Transmitter Alerts

Your paired dive computer can lose communication with the

transmitter when the transmitter is out of range, when the

transmitter signal is blocked by your body or that of another

diver, and when the transmitter loses battery power. You can

enable an alert that notifies you when your paired dive computer

has lost communication with the transmitter for 60 seconds.

On the paired dive computer, hold MENU.

Select Dive Setup > Air Integration > Connection Alert.

Dive Terminology

Air time remaining (ATR): The time you may remain at the

current depth until an ascent at 9 m/min. (30 ft./min.) would

result in surfacing with the reserve pressure.

Central nervous system (CNS): A measure of central nervous

system oxygen toxicity caused by exposure to increased

partial pressure of oxygen (PO2) while diving.

Closed-circuit rebreather (CCR): A diving mode used for dives

performed with a rebreather that recirculates exhaled gas

and removes carbon dioxide.

Maximum operating depth (MOD): The greatest depth at which

a breathing gas can be used before the partial pressure of

oxygen (PO2) exceeds the safe limit.

No decompression limit (NDL): A dive that does not require

decompression time while ascending to the surface.

Oxygen toxicity units (OTU): A measure of pulmonary oxygen

toxicity caused by exposure to increased partial pressure of

oxygen (PO2) while diving. One OTU is equivalent to

breathing 100% oxygen at 1 ATM for 1 minute.

Partial pressure of oxygen (PO2): The pressure of the oxygen

in the breathing gas, based on depth and oxygen percentage.

Pressure-based surface air consumption (PSAC): The

change in pressure over time, normalized to 1 ATM.

Respiratory minute volume (RMV): The change in gas volume

at ambient pressure over time.

Surface interval (SI): The amount of time that has elapsed

since the completion of the last dive.

Time to surface (TTS): The estimated amount of time it will take

to ascend to the surface, including decompression and safety

stops.

Volumetric surface air consumption (SAC): The change in

gas volume over time, normalized to 1 ATM.

Activities and Apps

Your device can be used for indoor, outdoor, athletic, and fitness

activities. When you start an activity, the device displays and

records sensor data. You can save activities and share them

with the Garmin Connect

™

community.

You can also add Connect IQ

™

activities and apps to your

device using the Connect IQ app (Connect IQ Features,

page 21).

For more information about activity tracking and fitness metric

accuracy, go to garmin.com/ataccuracy.

Starting an Activity

When you start an activity, GPS turns on automatically (if

required).

From the watch face, press START.

Select an option:

• Select an activity from your favorites.

• Select , and select an activity from the extended activity

list.

If the activity requires GPS signals, go outside to an area with

a clear view of the sky, and wait until the device is ready.

The device is ready after it establishes your heart rate,

acquires GPS signals (if required), and connects to your

wireless sensors (if required).

12 Activities and Apps

Press START to start the activity timer.

The device records activity data only while the activity timer is

running.

Tips for Recording Activities

• Charge the device before starting an activity (Charging the

Device, page 2).

• Press LAP to record laps, start a new set or pose, or

advance to the next workout step.

• Press UP or DOWN to view additional data pages.

Changing the Power Mode

You can change the power mode to extend battery life during an

activity.

During an activity, hold MENU.

Select Power Mode.

Select an option.

The watch displays the hours of battery life gained with the

selected power mode.

Stopping an Activity

Press STOP.

Select an option:

• To resume your activity, select Resume.

• To save the activity and return to watch mode, select

Save > Done.

• To suspend your activity and resume it at a later time,

select Resume Later.

• To mark a lap, select Lap.

• To navigate back to the starting point of your activity along

the path you traveled, select Back to Start > TracBack.

NOTE: This feature is available only for activities that use

GPS.

• To navigate back to the starting point of your activity by

the most direct path, select Back to Start > Route.

NOTE: This feature is available only for activities that use

GPS.

• To discard the activity and return to watch mode, select

Discard > Yes.

NOTE: After stopping the activity, the device saves it

automatically after 30 minutes.

Adding or Removing a Favorite Activity

The list of your favorite activities appears when you press

START from the watch face, and it provides quick access to the

activities you use most. You can add or remove favorite

activities at any time.

Hold MENU.

Select Activities & Apps.

Your favorite activities appear at the top of the list.

Select an option:

• To add a favorite activity, select the activity, and select

Set as Favorite.

• To remove a favorite activity, select the activity, and select

Remove from Favorites.

Creating a Custom Activity

From the watch face, press START.

Select Add.

Select an option:

• Select Copy Activity to create your custom activity

starting from one of your saved activities.

• Select Other to create a new custom activity.

If necessary, select an activity type.

Select a name or enter a custom name.

Duplicate activity names include a number, for example:

Bike(2).

Select an option:

• Select an option to customize specific activity settings. For

example, you can customize the data screens or auto

features.

• Select Done to save and use the custom activity.

Select Yes to add the activity to your list of favorites.

Indoor Activities

The Descent device can be used for training indoors, such as

running on an indoor track or using a stationary bike. GPS is

turned off for indoor activities.

When running or walking with GPS turned off, speed, distance,

and cadence are calculated using the accelerometer in the

device. The accelerometer is self-calibrating. The accuracy of

the speed, distance, and cadence data improves after a few

outdoor runs or walks using GPS.

TIP: Holding the handrails of the treadmill reduces accuracy.

You can use an optional foot pod to record pace, distance, and

cadence.

When cycling with GPS turned off, speed and distance are not

available unless you have an optional sensor that sends speed

and distance data to the device (such as a speed or cadence

sensor).

Going for a Virtual Run

You can pair your Descent Mk2i device with a compatible third-

party app to transmit pace, heart rate, or cadence data.

From the watch face, press START.

Select Virtual Run.

On your tablet, laptop, or smartphone, open the Zwift

™

app or

another virtual training app.

Follow the on-screen instructions to start a running activity

and pair the devices.

Press START to start the activity timer.

After you complete your run, press STOP to stop the activity

timer.

Calibrating the Treadmill Distance

To record more accurate distances for your treadmill runs, you

can calibrate the treadmill distance after you run at least 1.5 km

(1 mi.) on a treadmill. If you use different treadmills, you can

manually calibrate the treadmill distance on each treadmill or

after each run.

Start a treadmill activity (Starting an Activity, page 12).

Run on the treadmill until your Descent Mk2i device records

at least 1.5 km (1 mi.).

After you complete your run, press STOP.

Select an option:

• To calibrate the treadmill distance the first time, select

Save.

The device prompts you to complete the treadmill

calibration.

• To manually calibrate the treadmill distance after the first-

time calibration, select Calibrate & Save > Yes.

Check the treadmill display for the distance traveled, and

enter the distance on your device.

Recording a Strength Training Activity

You can record sets during a strength training activity. A set is

multiple repetitions (reps) of a single move.

Activities and Apps 13

From the watch face, press START.

Select Strength.

Select a workout.

The first time you record a strength training activity, you must

select which wrist your watch is on.

Select View to view a list of workout steps (optional).

TIP: While viewing workout steps, you can press START to

view an animation of the selected exercise, if available.

Select Do Workout.

Press START to start the set timer.

Start your first set.

The device counts your reps. Your rep count appears when

you complete at least four reps.

TIP: The device can only count reps of a single move for

each set. When you want to change moves, you should finish

the set and start a new one.

Press LAP to finish the set and move to the next exercise, if

available.

The watch displays the total reps for the set. After several

seconds, the rest timer appears.

If necessary, press DOWN, and edit the number of reps.

TIP: You can also add the weight used for the set.

When you are done resting, press LAP to start your next set.

Repeat for each strength training set until your activity is

complete.

After your last set, press START to stop the set timer.

Select Save.

Outdoor Activities

The Descent device comes preloaded with outdoor activities,

such as running and cycling. GPS is turned on for outdoor

activities. You can add new activities based on default activities,

such as walking or rowing. You can also add custom activities to

your device (Creating a Custom Activity, page 13).

Viewing Tide Information

WARNING

Tide information is for information purposes only. It is your

responsibility to heed all posted water-related guidance, to

remain aware of your surroundings, and to use safe judgment in,

on, and around the water at all times. Failure to heed this

warning could result in serious personal injury or death.

You can view information about a tide station, including the tide

height and when the next high and low tides will occur.

From the watch face, press START.

Select Tides.

Select an option:

• To use your current location when you are near a tide

station, select Search > Current Location.

• To select a location on the map, select Search > Use

Map.

• To enter the name of a city, select Search > City Search.

• To select a saved location, select Search > Saved

Locations.

• To enter coordinates for a location, select Search >

Coordinates.

A 24-hour tide chart appears for the current date with the

current tide height and information about the next tide .

Press DOWN to see tide information for upcoming days.

Press START, and select Star Location to save the tide

station (optional).

Viewing Your Ski Runs

Your device records the details of each downhill skiing or

snowboarding run using the auto run feature. This feature is

turned on by default for downhill skiing and snowboarding. It

automatically records new ski runs based on your movement.

The timer pauses when you stop moving downhill and when you

are on a chairlift. The timer remains paused during the chairlift

ride. You can start moving downhill to restart the timer. You can

view run details from the paused screen or while the timer is

running.

Start a skiing or snowboarding activity.

Hold MENU.

Select View Runs.

Press UP and DOWN to view details of your last run, your

current run, and your total runs.

The run screens include time, distance traveled, maximum

speed, average speed, and total descent.

Recording a Backcountry Skiing Activity

The backcountry skiing activity lets you manually switch

between climbing and descending tracking modes so you can

accurately track your statistics.

From the watch face, press START.

Select Backcountry Ski.

Select an option:

• If you are starting your activity on a climb, select

Climbing.

• If you are starting your activity moving downhill, select

Descending.

Press START to start the activity timer.

Press LAP to switch between climbing and descending

tracking modes.

After your activity is finished, press START to stop the timer.

Select Save.

Using the Metronome

The metronome feature plays tones at a steady rhythm to help

you improve your performance by training at a faster, slower, or

more consistent cadence.

NOTE: This feature is not available for all activities.

From the watch face, press START.

Select an activity.

Hold MENU.

Select the activity settings.

Select Metronome > Status > On.

Select an option:

• Select Beats / Minute to enter a value based on the

cadence you want to maintain.

• Select Alert Frequency to customize the frequency of the

beats.

14 Activities and Apps

• Select Sounds to customize the metronome tone and

vibration.

If necessary, select Preview to listen to the metronome

feature before you run.

Go for a run (Starting an Activity, page 12).

The metronome starts automatically.

During your run, press UP or DOWN to view the metronome

screen.

If necessary, hold MENU to change the metronome settings.

Playing Audio Prompts During an Activity

You can enable your Descent Mk2i device to play motivational

status announcements during a run or other activity. Audio

prompts play on your connected headphones using Bluetooth

technology, if available. Otherwise, audio prompts play on your

smartphone paired through the Garmin Connect app. During an

audio prompt, the device or smartphone mutes the primary

audio to play the announcement.

NOTE: This feature is not available for all activities.

Hold MENU.

Select Audio Prompts.

Select an option:

• To hear a prompt for each lap, select Lap Alert.

NOTE: The Lap Alert audio prompt is enabled by default.

• To customize prompts with your pace and speed

information, select Pace/Speed Alert.

• To customize prompts with your heart rate information,

select Heart Rate Alert.

• To customize prompts with power data, select Power

Alert.

• To hear prompts when you start and stop the timer,

including the Auto Pause

feature, select Timer Events.

• To hear activity alerts play as an audio prompt, select

Activity Alerts.

• To change the language or the dialect of the voice

prompts, select Dialect.

Jumpmaster

WARNING

The jumpmaster feature is for use by experienced skydivers

only. The jumpmaster feature should not be used as a primary

skydiving altimeter. Failure to input the appropriate jump related

information can lead to serious personal injury or death.

The jumpmaster feature follows military guidelines for

calculating the high altitude release point (HARP). The device

detects automatically when you have jumped to begin navigating

toward the desired impact point (DIP) using the barometer and

electronic compass.

Multisport

Triathletes, duathletes, and other multisport competitors can

take advantage of the multisport activities, such as Triathlon or

Swimrun. During a multisport activity, you can transition

between activities and continue to view your total time and

distance. For example, you can switch from biking to running

and view your total time and distance for biking and running

throughout the multisport activity.

You can customize a multisport activity, or you can use the

default triathlon activity set up for a standard triathlon.

Triathlon Training

When you participate in a triathlon, you can use the triathlon

activity to quickly transition to each sport segment, to time each

segment, and to save the activity.

From the watch face, press START.

Select Triathlon.

Press START to start the activity timer.

Press LAP at the beginning and end of each transition.

The transition feature can be turned on or off for the triathlon

activity settings.

After you complete your activity, press STOP, and select

Save.

Creating a Multisport Activity

From the watch face, press START.

Select Add > Multisport.

Select a multisport activity type, or enter a custom name.

Duplicate activity names include a number. For example,

Triathlon(2).

Select two or more activities.

Select an option:

• Select an option to customize specific activity settings. For

example, you can select whether to include transitions.

• Select Done to save and use the multisport activity.

Select Yes to add the activity to your list of favorites.

Swimming

Swim Terminology

Length: One trip down the pool.

Interval: One or more consecutive lengths. A new interval starts

after a rest.

Stroke: A stroke is counted every time your arm wearing the

device completes a full cycle.

Swolf: Your swolf score is the sum of the time for one pool

length and the number of strokes for that length. For

example, 30 seconds plus 15 strokes equals a swolf score of

45. For open water swimming, swolf is calculated over 25

meters. Swolf is a measurement of swimming efficiency and,

like golf, a lower score is better.

Critical swim speed (CSS): Your CSS is the theoretical speed

that you can maintain continuously without exhaustion. You

can use your CSS to guide your training pace and monitor

your improvement.

Stroke Types

Stroke type identification is available only for pool swimming.

Your stroke type is identified at the end of a length. Stroke types

appear in your swimming history and in your Garmin Connect

account. You can also select stroke type as a custom data field

(Customizing the Data Screens, page 41).

Free Freestyle

Back Backstroke

Breast Breaststroke

Fly Butterfly

Mixed More than one stroke type in an interval

Drill Used with drill logging (Training with the Drill Log, page 16)

Tips for Swimming Activities

• Before starting a pool swimming activity, follow the on-screen

instructions to select your pool size or enter a custom size.

The next time you start a pool swimming activity, the device

uses this pool size. You can hold MENU, select the activity

settings, and select Pool Size to change the size.

• Press LAP to record a rest during pool swimming.

The device automatically records swim intervals and lengths

for pool swimming.

• Press LAP to record an interval during open water swimming.

Activities and Apps 15

Resting During Pool Swimming

The default rest screen displays two rest timers. It also displays

time and distance for the last completed interval.

NOTE: Swim data is not recorded during a rest.

During your swim activity, press LAP to start a rest.

The display reverses to white text on a black background,

and the rest screen appears.

During a rest, press UP or DOWN to view other data screens

(optional).

Press LAP, and continue swimming.

Repeat for additional rest intervals.

Auto Rest

The auto rest feature is available only for pool swimming. Your

device automatically detects when you are resting, and the rest

screen appears. If you rest for more than 15 seconds, the device

automatically creates a rest interval. When you resume

swimming, the device automatically starts a new swim interval.

You can turn on the auto rest feature in the activity options

(Activities and App Settings, page 40).

TIP: For best results using the auto rest feature, minimize your

arm motions while resting.

If you do not want to use the auto rest feature, you can select

LAP to manually mark the beginning and end of each rest

interval.

Training with the Drill Log

The drill log feature is available only for pool swimming. You can

use the drill log feature to manually record kick sets, one-arm

swimming, or any type of swimming that is not one of the four

major strokes.

During your pool swim activity, press UP or DOWN to view

the drill log screen.

Press LAP to start the drill timer.

After you complete a drill interval, press LAP.

The drill timer stops, but the activity timer continues to record

the entire swim session.

Select a distance for the completed drill.

Distance increments are based on the pool size selected for

the activity profile.

Select an option:

• To start another drill interval, press LAP.

• To start a swim interval, press UP or DOWN to return to

the swim training screens.

Turning Off Wrist-based Heart Rate While Swimming

Wrist-based heart rate is turned on by default for swim activities.

The device is also compatible with the HRM-Tri accessory and

the HRM-Swim accessory. If both wrist-based heart rate and

chest heart rate data are available, your device uses the chest

heart rate data.

From the heart rate widget, hold MENU.

NOTE: You may need to add the widget to your widget loop

(Customizing the Widget Loop, page 44).

Select Options > While Swimming > Off.

Golfing

Playing Golf

Before you play golf, you should charge the device (Charging

the Device, page 2).

From the watch face, press START.

Select Golf.

Go outside, and wait while the device locates satellites.

Select a course from the list of available courses.

If necessary, set your driver distance.

Select Yes to keep score.

Select a tee box.

After you complete your round, press START, and select End

Round.

Hole Information

The device shows the current hole you are playing, and

automatically transitions when you move to a new hole.

NOTE: Because pin locations change, the device calculates the

distance to the front, middle, and back of the green, but not the

actual pin location.

Current hole number

Distance to the back of the green

Distance to the middle of the green

Distance to the front of the green

Par for the hole

Map of the green

Driver distance from the tee box

Big Numbers Mode

You can change the size of the numbers on the hole information

screen.

Hold MENU, select the activity settings, and select Big

Numbers.

The distance to the back of the green

The distance to the middle of the green or selected pin position

The distance to the front of the green

The current hole number

The par for the current hole

Measuring Distance with Button Targeting

From the hole information screen, you can use the button

targeting feature to measure the distance to a point on the map.

Press UP or DOWN to measure the distance to the target.

If necessary, select or to zoom in or out.

Changing Holes

You can change holes manually from the hole view screen.

While playing golf, press START.

Select Change Hole.

Select a hole.

16 Activities and Apps

Moving the Flag

You can take a closer look at the green and move the pin

location.

From the hole information screen, press START.

Select Move Flag.

Press UP or DOWN to move the pin position.

Press START.

The distances on the hole information screen are updated to

show the new pin location. The pin location is saved for only

the current round.

Viewing Measured Shots

Before the device can automatically detect and measure shots,

you must enable scoring.

Your device features automatic shot detection and recording.

Each time you take a shot along the fairway, the device records

your shot distance so you can view it later.

TIP: Automatic shot detection works best when you wear the

device on your leading wrist and make good contact with the

ball. Putts are not detected.

While playing golf, press START.

Select Measure Shot.

Your last shot distance appears.

NOTE: The distance automatically resets when you hit the

ball again, putt on the green, or move to the next hole.

Press DOWN to view all recorded shot distances.

Viewing Layup and Dogleg Distances

You can view a list of layup and dogleg distances for par 4 and 5

holes. Custom targets also appear in this list.

From the hole information screen, press START.

Select Layups.

Each layup and the distance until you reach each layup

appear on the screen.

NOTE: Distances are removed from the list as you pass

them.

Saving Custom Targets

While playing a round, you can save up to five custom targets

for each hole. Saving a target is useful for recording objects or

obstacles that are not shown on the map. You can view the

distances to these targets from the layup and dogleg screen

(Viewing Layup and Dogleg Distances, page 17).

Stand near the target you want to save.

NOTE: You cannot save a target that is far from the currently

selected hole.

From the hole information screen, press START.

Select Custom Targets.

Select a target type.

Keeping Score

From the hole information screen, press START.

Select Scorecard.

The scorecard appears when you are on the green.

Press UP or DOWN to scroll through the holes.

Press START to select a hole.

Press UP or DOWN to set the score.

Your total score is updated.

Updating a Score

From the hole information screen, press START.

Select Scorecard.

Press UP or DOWN to scroll through the holes.

Press START to select a hole.

Press UP or DOWN to change the score for that hole.

Your total score is updated.

Setting the Scoring Method

You can change the method the device uses to keep score.

From the hole information screen, hold MENU.

Select the activity settings.

Select Scoring Method.

Select a scoring method.

About Stableford Scoring

When you select the Stableford scoring method (Setting the

Scoring Method, page 17), points are awarded based on the

number of strokes taken relative to par. At the end of a round,

the highest score wins. The device awards points as specified

by the United States Golf Association.

The scorecard for a Stableford scored game shows points

instead of strokes.

Points Strokes Taken Relative to Par

0 2 or more over

1 1 over

2 Par

3 1 under

4 2 under

5 3 under

Setting Your Handicap

From the hole information screen, hold MENU.

Select the activity settings.

Select Handicap Scoring.

Select a handicap scoring option:

• To enter the number of strokes to be subtracted from your

total score, select Local Handicap.

• To enter the player's handicap index and the course slope

rating used to calculate your course handicap, select

Index/Slope.

Set your handicap.

Enabling Statistics Tracking

The Stat Tracking feature enables detailed statistics tracking

while playing golf.

From the hole information screen, hold MENU.

Select the activity settings.

Select Stat Tracking to enable tracking statistics.

Recording Statistics

Before you can record statistics, you must enable statistics

tracking (Enabling Statistics Tracking, page 17).

From the scorecard, select a hole.

Enter the number of strokes taken, and press START.

Set the number of putts taken, and press START.

If necessary, select an option:

NOTE: If you are on a par 3 hole, fairway information does

not appear.

• If your ball hit the fairway, select In Fairway.

• If your ball missed the fairway, select Missed Right or

Missed Left.

If necessary, enter the number of penalty strokes.

TruSwing

™

Your device is compatible with the TruSwing sensor. You can

use the TruSwing app on your watch to view swing metrics

recorded from your TruSwing sensor. See the owner's manual

for your TruSwing sensor for more informationwww.garmin.com

/manuals/truswing.

Activities and Apps 17

Using the Golf Odometer

You can use the odometer to record the time, distance, and

steps traveled. The odometer automatically starts and stops

when you start or end a round.

From the hole information screen, press START.

Select Odometer.

If necessary, select Reset to reset the odometer to zero.

Viewing PlaysLike Distance

The "plays like" distance feature accounts for elevation changes

on the course by showing the adjusted distance to the green.

From the hole information screen, hold MENU.

Select the activity settings.

Select PlaysLike.

An icon appears next to each distance.

Distance plays longer than expected due to a change in

elevation.

Distance plays as expected.

Distance plays shorter than expected due to a change in

elevation.

Viewing the Direction to the Pin

The PinPointer feature is a compass that provides directional

assistance when you are unable to see the green. This feature

can help you line up a shot even if you are in the woods or in a

deep sand trap.

NOTE: Do not use the PinPointer feature while in a golf cart.

Interference from the golf cart can affect the accuracy of the

compass.

From the hole information screen, press START.

Select PinPointer.

The arrow points to the pin location.

Starting an Expedition

You can use the Expedition app to prolong the battery life while

recording a multi-day activity.

From the watch face, press START.

Select Expedition.

Press START to start the activity timer.

The device enters low power mode and collects GPS track

points once an hour. To maximize battery life, the device

turns off all sensors and accessories, including the

connection to your smartphone.

Changing the Track Point Recording Interval

During an expedition, GPS track points are recorded once an

hour by default. You can change how often GPS track points are

recorded. Recording track points less frequently maximizes

battery life.

NOTE: To maximize battery life, GPS track points are not

recorded after sunset. You can customize this option in the

activity settings.

From the watch face, press START.

Select Expedition.

Hold MENU.

Select the activity settings.

Select Recording Interval.

Select an option.

Recording a Track Point Manually

During an expedition, track points are recorded automatically

based on the selected recording interval. You can manually

record a track point at any time.

During an expedition, press UP or DOWN to view the map

page.

Press START.

Select Add Point.

Viewing Track Points

During an expedition, press UP or DOWN to view the map

page.

Press START.

Select View Points.

Select a track point from the list.

Select an option:

• To start navigating to the track point, select Go To.

• To view detailed information about the track point, select

Details.

Connected Features

Connected features are available for your Descent device when

you connect the device to a compatible smartphone using

Bluetooth technology. Some features require you to install the

Garmin Connect app on the connected smartphone. Go to

www.garmin.com/apps for more information. Some features are

also available when you connect your device to a wireless

network.

Phone notifications: Displays phone notifications and

messages on your Descent device.

LiveTrack: Allows friends and family to follow your races and

training activities in real time. You can invite followers using

email or social media, allowing them to view your live data on

a Garmin Connect tracking page.

GroupTrack: Allows you to keep track of your connections

using LiveTrack directly on screen and in real time.

Activity uploads to Garmin Connect: Automatically sends

your activity to your Garmin Connect account as soon as you

finish recording the activity.

Connect IQ: Allows you to extend your device features with new

watch faces, widgets, apps, and data fields.

Software Updates: Allows you to update your device software.

Weather: Allows you to view current weather conditions and

weather forecasts.

Bluetooth sensors: Allows you to connect Bluetooth

compatible sensors, such as a heart rate monitor.

Find my phone: Locates your lost smartphone that is paired

with your Descent device and currently within range.

Find my device: Locates your lost Descent device that is paired

with your smarphone and currently within range.

Enabling Bluetooth Notifications

Before you can enable notifications, you must pair the Descent

device with a compatible mobile device (Pairing Your

Smartphone, page 2).

Hold MENU.

Select Phone > Smart Notifications > Status > On.

Select During Activity.

Select a notification preference.

Select a sound preference.

Select Not During Activity.

Select a notification preference.

Select a sound preference.

Select Privacy.

Select a privacy preference.

18 Connected Features

Select Timeout.

Select the amount of time the alert for a new notification

appears on the screen.

Select Signature to add a signature to your text message

replies.

Viewing Notifications

From the watch face, press UP or DOWN to view the

notifications widget.

Press START.

Select a notification.

Press DOWN for more options.

Press BACK to return to the previous screen.

Receiving an Incoming Phone Call

When you receive a phone call on your connected smartphone,

the Descent device displays the name or phone number of the

caller.

• To accept the call, select Accept.

NOTE: To talk to the caller, you must use your connected

smartphone.

• To decline the call, select Decline.

• To decline the call and immediately send a text message

reply, select Reply, and select a message from the list.

NOTE: This feature is available only if your device is

connected to an Android

™

smartphone.

Replying to a Text Message

NOTE: This feature is available only for smartphones with

Android.

When you receive a text message notification on your Descent

device, you can send a quick reply by selecting from a list of

messages. You can customize messages in the Garmin

Connect app.

NOTE: This feature sends text messages using your phone.

Regular text message limits and charges from your carrier and

phone plan may apply. Contact your mobile carrier for more

information about text message charges or limits.

From the watch face, press UP or DOWN to view the

notifications widget.

Press START, and select a text message notification.

Press DOWN.

Select Reply.

Select a message from the list.

Your phone sends the selected message as an SMS text

message.

Managing Notifications

You can use your compatible smartphone to manage

notifications that appear on your Descent Mk2i device.

Select an option:

• If you are using an iPhone

device, go to the iOS

notifications settings to select the items to show on the

device.

• If you are using an Android smartphone, from the Garmin

Connect app, select Settings > Notifications.

Turning Off the Bluetooth Smartphone

Connection

You can turn off the Bluetooth smartphone connection from the

controls menu.

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT to view the controls menu.

Select to turn off the Bluetooth smartphone connection on

your Descent device.

Refer to the owner's manual for your mobile device to turn off

Bluetooth technology on your mobile device.

Turning On and Off Smartphone Connection

Alerts

You can set the Descent Mk2i device to alert you when your

paired smartphone connects and disconnects using Bluetooth

technology.

NOTE: Smartphone connection alerts are turned off by default.

Hold MENU.

Select Phone > Alerts.

Locating a Lost Mobile Device

You can use this feature to help locate a lost mobile device that

is paired using Bluetooth technology and currently within range.

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT to view the controls menu.

Select .

The Descent device begins searching for your paired mobile

device. An audible alert sounds on your mobile device, and

the Bluetooth signal strength appears on the Descent device

screen. The Bluetooth signal strength increases as you move

closer to your mobile device.

Press BACK to stop searching.

Garmin Dive App

The Garmin Dive app allows you to upload your dive logs from

your compatible Garmin device. You can add more detailed

information about your dives, including environmental

conditions, photos, notes, and dive buddies. You can use the

map to browse for new dive locations, and view the location

details and photos shared by other users.

The Garmin Dive app syncs your data with your Garmin

Connect account. You can download the Garmin Dive app from

the app store on your smartphone.

Garmin Connect

Your Garmin Connect account allows you to track your

performance and connect with your friends. It gives you the tools

to track, analyze, share, and encourage each other. You can

record the events of your active lifestyle, including runs, walks,

rides, swims, hikes, golf games, and more.

You can create your free Garmin Connect account when you

pair your device with your phone using the Garmin Connect app.

You can also create an account when you set up the Garmin

Express application (www.garmin.com/express).

Store your activities: After you complete and save a timed

activity with your device, you can upload that activity to your

Garmin Connect account and keep it as long as you want.

Analyze your data: You can view more detailed information

about your fitness and outdoor activities, including time,

distance, heart rate, calories burned, cadence, an overhead

map view, and pace and speed charts. You can view more

detailed information about your golf games, including

scorecards, statistics, and course information. You can also

view customizable reports.

NOTE: To view some data, you must pair an optional

wireless sensor with your device (Pairing Your Wireless

Sensors, page 49).

Connected Features 19

Track your progress: You can track your daily steps, join a

friendly competition with your connections, and meet your

goals.

Share your activities: You can connect with friends to follow

each other's activities or post links to your activities on your

favorite social networking sites.

Manage your settings: You can customize your device and

user settings on your Garmin Connect account.

Updating the Software Using the Smartphone Apps

After you pair your device with your smartphone (Pairing Your

Smartphone, page 2), you can use the Garmin Dive and Garmin

Connect apps to update your device software.

Sync your device with one of the apps (Manually Syncing

Data with Garmin Connect, page 20).

When new software is available, the app automatically sends

the update to your device.

Updating the Software Using Garmin Express

Before you can update your device software, you must

download and install the Garmin Express application and add

your device (Using Garmin Connect on Your Computer,

page 20).

Connect the device to your computer using the USB cable.

When new software is available, the Garmin Express

application sends it to your device.

After the Garmin Express application finishes sending the

update, disconnect the device from your computer.

Your device installs the update.

Using Garmin Connect on Your Computer

The Garmin Express application connects your device to your

Garmin Connect account using a computer. You can use the

Garmin Express application to upload your activity data to your

Garmin Connect account and to send data, such as workouts or

training plans, from the Garmin Connect website to your device.

You can also install device software updates and manage your

Connect IQ apps.

Connect the device to your computer using the USB cable.

Go to www.garmin.com/express.

Download and install the Garmin Express application.

Open the Garmin Express application, and select Add

Device.

Follow the on-screen instructions.

Manually Syncing Data with Garmin Connect

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT to view the controls menu.

Select .

Garmin Explore

™

The Garmin Explore website and mobile app allow you to plan

trips and use cloud storage for your waypoints, routes, and

tracks. They offer advanced planning both online and offline,

allowing you to share and sync data with your compatible

Garmin device. You can use the mobile app to download maps

for offline access, and then navigate anywhere without using

your cellular service.

You can download the Garmin Explore app from the app store

on your smartphone, or you can go to explore.garmin.com.

Garmin Golf

™

App

The Garmin Golf app allows you to upload scorecards from your

compatible Garmin device to view detailed statistics and shot

analyses. Golfers can compete with each other at different

courses using the Garmin Golf app. More than 41,000 courses

have leaderboards that anyone can join. You can set up a

tournament event and invite players to compete.

The Garmin Golf app syncs your data with your Garmin Connect

account. You can download the Garmin Golf app from the app

store on your smartphone.

Safety and Tracking Features

CAUTION

Incident detection and assistance are supplemental features and

should not be relied on as a primary method to obtain

emergency assistance. The Garmin Connect app does not

contact emergency services on your behalf.

The Descent Mk2i device has safety and tracking features that

must be set up with the Garmin Connect app.

NOTICE

To use these features, you must be connected to the Garmin

Connect app using Bluetooth technology. You can enter

emergency contacts in your Garmin Connect account.

For more information about incident detection and assistance,

go to garmin.com/safety.

Assistance: Allows you to send an automated message with

your name, LiveTrack link, and GPS location to your

emergency contacts.

Incident detection: When the Descent Mk2i device detects an

incident during an outdoor walk, run, or bike activity, the

device sends an automated message, LiveTrack link, and

GPS location to your emergency contacts.

LiveTrack: Allows friends and family to follow your races and

training activities in real time. You can invite followers using

email or social media, allowing them to view your live data on

a Garmin Connect tracking page.

Live Event Sharing: Allows you to send messages to friends

and family during an event, providing real-time updates.

NOTE: This feature is available only if your device is

connected to an Android smartphone.

GroupTrack: Allows you to keep track of your connections

using LiveTrack directly on screen and in real time.

Adding Emergency Contacts

Emergency contact phone numbers are used for the incident

detection and assistance features.

From the Garmin Connect app, select or .

Select Safety & Tracking > Incident Detection &

Assistance > Add Emergency Contact.

Follow the on-screen instructions.

20 Safety and Tracking Features

Adding Contacts

You can add up to 50 contacts to the Garmin Connect app.

Contact emails can be used with the LiveTrack feature. Three of

these contacts can be used as emergency contacts (Adding

Emergency Contacts, page 20).

From the Garmin Connect app, select or .

Select Contacts.

Follow the on-screen instructions.

After you add contacts, you must sync your data to apply the

changes to your Descent Mk2i device (Manually Syncing Data

with Garmin Connect, page 20).

Turning Incident Detection On and Off

Hold MENU.

Select Safety & Tracking > Incident Detection.

Select an activity.

NOTE: Incident detection is available only for outdoor walk,

run, and bike activities.

When an incident is detected by your Descent Mk2i device with

GPS enabled, the Garmin Connect app can send an automated

text message and email with your name and GPS location to

your emergency contacts. A message appears indicating your

contacts will be informed after 30 seconds have elapsed. You

can select Cancel before the countdown is complete to cancel

the message.

Requesting Assistance

Before you can request assistance, you must set up emergency

contacts (Adding Emergency Contacts, page 20).

Hold the LIGHT key.

When you feel three vibrations, release the key to activate

the assistance feature.

The countdown screen appears.

TIP: You can select Cancel before the countdown is

complete to cancel the message.

Starting a GroupTrack Session

Before you can start a GroupTrack session, you must have a

Garmin Connect account, a compatible smartphone, and the

Garmin Connect app.

These instructions are for starting a GroupTrack session with

Descent Mk2i devices. If your connections have other

compatible devices, you can see them on the map. The other

devices may not be able to display GroupTrack riders on the

map.

Go outside, and turn on the Descent Mk2i device.

Pair your smartphone with the Descent Mk2i device (Pairing

Your Smartphone, page 2).

On the Descent Mk2i device, hold MENU, and select Safety

& Tracking > GroupTrack > Show on Map to enable

viewing connections on the map screen.

In the Garmin Connect app, from the settings menu, select

Safety & Tracking > LiveTrack > GroupTrack.

If you have more than one compatible device, select a device

for the GroupTrack session.

Select Visible to > All Connections.

Select Start LiveTrack.

On the Descent Mk2i device, start an activity.

Scroll to the map to view your connections.

TIP: From the map, you can hold MENU and select Nearby

Connections to view distance, direction, and pace or speed

information for other connections in the GroupTrack session.

Tips for GroupTrack Sessions

The GroupTrack feature allows you to keep track of other

connections in your group using LiveTrack directly on the

screen. All members of the group must be your connections in

your Garmin Connect account.

• Start your activity outside using GPS.

• Pair your Descent Mk2i device with your smartphone using

Bluetooth technology.

• In the Garmin Connect app, from the settings menu, select

Connections to update the list of connections for your

GroupTrack session.

• Make sure all of your connections pair to their smartphones

and start a LiveTrack session in the Garmin Connect app.

• Make sure all your connections are in range (40 km or

25 mi.).

• During a GroupTrack session, scroll to the map to view your

connections (Adding a Map to an Activity, page 41).

GroupTrack Settings

Hold MENU, and select Safety & Tracking > GroupTrack.

Show on Map: Enables you to view connections on the map

screen during a GroupTrack session.

Activity Types: Allows you to select which activity types appear

on the map screen during a GroupTrack session.

Wi‑Fi

Connected Features

Activity uploads to your Garmin Connect account:

Automatically sends your activity to your Garmin Connect

account as soon as you finish recording the activity.

Audio content: Allows you to sync audio content from third-

party providers.

Software updates: Your device downloads and installs the

latest software update automatically when a Wi‑Fi connection

is available.

Workouts and training plans: You can browse for and select

workouts and training plans on the Garmin Connect site. The

next time your device has a Wi‑Fi connection, the files are

wirelessly sent to your device.

Connecting to a Wi‑Fi Network

You must connect your device to the Garmin Connect app on

your smartphone or to the Garmin Express application on your

computer before you can connect to a Wi‑Fi network.

Hold MENU.

Select Wi-Fi > My Networks > Add Network.

The device displays a list of nearby Wi‑Fi networks.

Select a network.

If necessary, enter the password for the network.

The device connects to the network, and the network is added to

the list of saved networks. The device reconnects to this network

automatically when it is within range.

Connect IQ Features

You can add Connect IQ features to your watch from Garmin

and other providers using the Connect IQ app. You can

customize your device with watch faces, data fields, widgets,

and apps.

NOTE: For your safety, Connect IQ features are not available

while diving. This ensures that all dive capabilities function as

designed.

Watch Faces: Allow you to customize the appearance of the

clock.

Wi‑Fi

Connected Features 21

Data Fields: Allow you to download new data fields that present

sensor, activity, and history data in new ways. You can add

Connect IQ data fields to built-in features and pages.

Widgets: Provide information at a glance, including sensor data

and notifications.

Apps: Add interactive features to your watch, such as new

outdoor and fitness activity types.

Downloading Connect IQ Features

Before you can download features from the Connect IQ app, you

must pair your Descent Mk2i device with your smartphone

(Pairing Your Smartphone, page 2).

From the app store on your smartphone, install and open the

Connect IQ app.

If necessary, select your device.

Select a Connect IQ feature.

Follow the on-screen instructions.

Downloading Connect IQ Features Using

Your Computer

Connect the device to your computer using a USB cable.

Go to apps.garmin.com, and sign in.

Select a Connect IQ feature, and download it.

Follow the on-screen instructions.

Garmin Pay

The Garmin Pay feature allows you to use your watch to pay for

purchases in participating stores using credit or debit cards from

a participating financial institution.

Setting Up Your Garmin Pay Wallet

You can add one or more participating credit or debit cards to

your Garmin Pay wallet. Go to garmin.com/garminpay/banks to

find participating financial institutions.

From the Garmin Connect app, select or .

Select Garmin Pay > Get Started.

Follow the on-screen instructions.

Paying for a Purchase Using Your Watch

Before you can use your watch to pay for purchases, you must

set up at least one payment card.

You can use your watch to pay for purchases in a participating

store.

Hold LIGHT.

Select .

Enter your four-digit passcode.

NOTE: If you enter your passcode incorrectly three times,

your wallet locks, and you must reset your passcode in the

Garmin Connect app.

Your most recently used payment card appears.

If you have added multiple cards to your Garmin Pay wallet,

select DOWN to change to another card (optional).

Within 60 seconds, hold your watch near the payment reader,

with the watch facing the reader.

The watch vibrates and displays a check mark when it is

finished communicating with the reader.

If necessary, follow the instructions on the card reader to

complete the transaction.

TIP: After you successfully enter your passcode, you can make

payments without a passcode for 24 hours while you continue to

wear your watch. If you remove the watch from your wrist or

disable heart rate monitoring, you must enter the passcode

again before making a payment.

Adding a Card to Your Garmin Pay Wallet

You can add up to 10 credit or debit cards to your Garmin Pay

wallet.

From the Garmin Connect app, select or .

Select Garmin Pay > > Add Card.

Follow the on-screen instructions.

After the card is added, you can select the card on your watch

when you make a payment.

Managing Your Garmin Pay Cards

You can temporarily suspend or delete a card.

NOTE: In some countries, participating financial institutions may

restrict the Garmin Pay features.

From the Garmin Connect app, select or .

Select Garmin Pay.

Select a card.

Select an option:

• To temporarily suspend or unsuspend the card, select

Suspend Card.

The card must be active to make purchases using your

Descent Mk2i device.

• To delete the card, select .

Changing Your Garmin Pay Passcode

You must know your current passcode to change it. If you forget

your passcode, you must reset the Garmin Pay feature for your

Descent Mk2i device, create a new passcode, and reenter your

card information.

From the Descent Mk2i device page in the Garmin Connect

app, select Garmin Pay > Change Passcode.

Follow the on-screen instructions.

The next time you pay using your Descent Mk2i device, you

must enter the new passcode.

Music

You can download audio content to your device, so you can

listen when your smartphone is not nearby. The Garmin

Connect app and Garmin Express application allow you to

download audio content from a third-party provider or your

computer.

You can use the music controls to control music playback on

your smartphone or to play music stored on your device. To

listen to audio content stored on your device, you must connect

headphones with Bluetooth technology.

Connecting to a Third-Party Provider

Before you can download music or other audio files to your

compatible watch from a supported third-party provider, you

must connect to the provider using the Garmin Connect app.

From the Garmin Connect app, select or .

Select Garmin Devices, and select your device.

Select Music.

Select an option:

• To connect to an installed provider, select a provider, and

follow the on-screen instructions.

• To connect to a new provider, select Get Music Apps,

locate a provider, and follow the on-screen instructions.

22 Garmin Pay

Downloading Audio Content from a Third-Party

Provider

Before you can download audio content from a third-party

provider, you must connect to a Wi‑Fi network (Connecting to a

‑

Fi Network, page 21).

Hold DOWN from any screen to open the music controls.

Hold MENU.

Select Music Providers.

Select a connected provider.

Select a playlist or other item to download to the device.

If necessary, select BACK until you are prompted to sync

with the service, and select Yes.

NOTE: Downloading audio content can drain the battery. You

may be required to connect the device to an external power

source if the battery is low.

Downloading Audio Content from Spotify

Before you can download audio content from Spotify, you must

connect to a Wi‑Fi network (Connecting to a Wi

‑

Fi Network,

page 21).

Hold DOWN from any screen to open the music controls.

Hold MENU.

Select Music Providers > Spotify.

Select Add music & podcasts.

Select a playlist or other item to download to the device.

NOTE: Downloading audio content can drain the battery. You

may need to connect the device to an external power source

if the remaining battery life is insufficient.

The selected playlists and other items are downloaded to the

device.

Changing the Music Provider

Hold DOWN from any screen to open the music controls.

Hold MENU.

Select Music Providers.

Select a connected provider.

Disconnecting from a Third-Party Provider

From the Garmin Connect app, select or .

Select Garmin Devices, and select your device.

Select Music.

Select an installed third-party provider, and follow the on-

screen instructions to disconnect the third-party provider from

your device.

Downloading Personal Audio Content

Before you can send your personal music to your device, you

must install the Garmin Express application on your computer

(www.garmin.com/express).

You can load your personal audio files, such as .mp3 and .aac

files, to a Descent Mk2i device from your computer.

Connect the device to your computer using the included USB

cable.

On your computer, open the Garmin Express application,

select your device, and select Music.

TIP: For Windows

computers, you can select and browse

to the folder with your audio files. For Apple

computers, the

Garmin Express application uses your iTunes

library.

In the My Music or iTunes Library list, select an audio file

category, such as songs or playlists.

Select the checkboxes for the audio files, and select Send to

Device.

If necessary, in the Descent Mk2i list, select a category,

select the checkboxes, and select Remove From Device to

remove audio files.

Listening to Music

Hold DOWN from any screen to open the music controls.

Connect your headphones with Bluetooth technology

(Connecting Bluetooth Headphones, page 23).

Hold MENU.

Select Music Providers, and select an option:

• To listen to music downloaded to the watch from your

computer, select My Music (Downloading Personal Audio

Content, page 23).

• To control music playback on your smartphone, select

Control Phone.

• To listen to music from a third-party provider, select the

name of the provider.

Select to open the music playback controls.

Music Playback Controls

Select to manage content from some third-party providers.

Select to browse the audio files and playlists for the selected

source.

Select to adjust the volume.

Select to play and pause the current audio file.

Select to skip to the next audio file in the playlist.

Hold to fast forward through the current audio file.

Select to restart the current audio file.

Select twice to skip to the previous audio file in the playlist.

Hold to rewind through the current audio file.

Select to change the repeat mode.

Select to change the shuffle mode.

Connecting Bluetooth Headphones

To listen to music loaded onto your Descent Mk2i device, you

must connect headphones using Bluetooth technology.

Bring the headphones within 2 m (6.6 ft.) of your device.

Enable pairing mode on the headphones.

Hold MENU.

Select Music > Headphones > Add New.

Select your headphones to complete the pairing process.

Changing the Audio Mode

You can change the music playback mode from stereo to mono.

Hold MENU.

Select Music > Audio.

Select an option.

Heart Rate Features

The Descent Mk2i device has a wrist-based heart rate monitor

and is also compatible with chest heart rate monitors (sold

separately). You can view heart rate data on the heart rate

widget. If both wrist-based heart rate and chest heart rate data

are available when you start an activity, your device uses the

chest heart rate data.

Wrist-based Heart Rate

Wearing the Device

• Wear the device above your wrist bone.

NOTE: The device should be snug but comfortable. For more

accurate heart rate readings, the device should not move

Heart Rate Features 23

while running or exercising. For pulse oximeter readings, you

should remain motionless.

NOTE: While diving, the device should stay in contact with

your skin, and it should not bump into other wrist-worn

devices.

NOTE: The optical sensor is located on the back of the

device.

• See Tips for Erratic Heart Rate Data, page 24 for more

information about wrist-based heart rate.

• See Tips for Erratic Pulse Oximeter Data, page 31 for more

information about the pulse oximeter sensor.

• For more information about accuracy, go to garmin.com

/ataccuracy.

• For more information about device wear and care, go to

www.garmin.com/fitandcare.

Tips for Erratic Heart Rate Data

If the heart rate data is erratic or does not appear, you can try

these tips.

• Clean and dry your arm before putting on the device.

• Avoid wearing sunscreen, lotion, and insect repellent under

the device.

• Avoid scratching the heart rate sensor on the back of the

device.

• Wear the device above your wrist bone. The device should

be snug but comfortable.

• Wait until the icon is solid before starting your activity.

• Warm up for 5 to 10 minutes and get a heart rate reading

before starting your activity.

NOTE: In cold environments, warm up indoors.

• Rinse the device with fresh water after each workout.

Viewing the Heart Rate Widget

From the watch face, press UP or DOWN to view the heart

rate widget.

NOTE: You may need to add the widget to your widget loop

(Customizing the Widget Loop, page 44).

Press START to view your current heart rate in beats per

minute (bpm) and a graph of your heart rate for the last 4

hours.

Press DOWN to view your average resting heart rate values

for the last 7 days.

Broadcasting Heart Rate Data to Garmin Devices

You can broadcast your heart rate data from your Descent Mk2i

device and view it on paired Garmin devices.

NOTE: Broadcasting heart rate data decreases battery life.

From the heart rate widget, hold MENU.

Select Options > Broadcast Heart Rate.

The Descent Mk2i device starts broadcasting your heart rate

data, and appears.

NOTE: You can view only the heart rate widget while

broadcasting heart rate data from the heart rate widget.

Pair your Descent Mk2i device with your Garmin ANT+

compatible device.

NOTE: The pairing instructions differ for each Garmin

compatible device. See your owner's manual.

TIP: To stop broadcasting your heart rate data, press any

button, and select Yes.

Broadcasting Heart Rate Data During an Activity

You can set up your Descent Mk2i device to broadcast your

heart rate data automatically when you begin an activity. For

example, you can broadcast your heart rate data to an Edge

device while cycling, or to a VIRB

action camera during an

activity.

NOTE: Broadcasting heart rate data decreases battery life.

NOTE: Broadcasting heart rate data is not available for dive

activities.

From the heart rate widget, hold MENU.

Select Options > Broadcast During Activity.

Begin an activity (Starting an Activity, page 12).

The Descent Mk2i device starts broadcasting your heart rate

data in the background.

NOTE: There is no indication that the device is broadcasting

your heart rate data during an activity.

Pair your Descent Mk2i device with your Garmin ANT+

compatible device.

NOTE: The pairing instructions differ for each Garmin

compatible device. See your owner's manual.

TIP: To stop broadcasting your heart rate data, stop the

activity (Stopping an Activity, page 13).

Setting an Abnormal Heart Rate Alert

CAUTION

This feature only alerts you when your heart rate exceeds or

drops below a certain number of beats per minute, as selected

by the user, after a period of inactivity. This feature does not

notify you of any potential heart condition and is not intended to

treat or diagnose any medical condition or disease. Always defer

to your health care provider for any heart-related issues.

You can set the heart rate threshold value.

From the heart rate widget, hold MENU.

Select Options > Abnormal Heart Rate Alerts.

Select High Alert or Low Alert.

Set the heart rate threshold value.

Each time your heart rate exceeds or drops below the threshold

value, a message appears and the device vibrates.

Turning Off the Wrist-based Heart Rate Monitor

The default value for the Wrist Heart Rate setting is Auto. The

device automatically uses the wrist-based heart rate monitor

unless you pair an ANT+ heart rate monitor to the device.

NOTE: Disabling the wrist-based heart rate monitor also

disables the wrist-based pulse oximeter sensor. You can

perform a manual reading from the pulse oximeter widget.

From the heart rate widget, hold MENU.

Select Options > Status > Off.

Running Dynamics

You can use your compatible Descent device paired with the

HRM-Tri accessory or other running dynamics accessory to

provide real-time feedback about your running form.

The running dynamics accessory has an accelerometer that

measures torso movement in order to calculate six running

metrics.

Cadence: Cadence is the number of steps per minute. It

displays the total steps (right and left combined).

Vertical oscillation: Vertical oscillation is your bounce while

running. It displays the vertical motion of your torso,

measured in centimeters.

24 Heart Rate Features

Ground contact time: Ground contact time is the amount of

time in each step that you spend on the ground while

running. It is measured in milliseconds.

NOTE: Ground contact time and balance are not available

while walking.

Ground contact time balance: Ground contact time balance

displays the left/right balance of your ground contact time

while running. It displays a percentage. For example, 53.2

with an arrow pointing left or right.

Stride length: Stride length is the length of your stride from one

footfall to the next. It is measured in meters.

Vertical ratio: Vertical ratio is the ratio of vertical oscillation to

stride length. It displays a percentage. A lower number

typically indicates better running form.

Training with Running Dynamics

Before you can view running dynamics, you must put on a

running dynamics accessory, such as the HRM-Tri accessory,

and pair it with your device (Pairing Your Wireless Sensors,

page 49).

Hold MENU.

Select Activities & Apps.

Select an activity.

Select the activity settings.

Select Data Screens > Add New.

Select a running dynamics data screen.

NOTE: The running dynamics screens are not available for

all activities.

Go for a run (Starting an Activity, page 12).

Select UP or DOWN to open a running dynamics screen to

view your metrics.

Color Gauges and Running Dynamics Data

The running dynamics screens display a color gauge for the primary metric. You can display cadence, vertical oscillation, ground

contact time, ground contact time balance, or vertical ratio as the primary metric. The color gauge shows you how your running

dynamics data compare to those of other runners. The color zones are based on percentiles.

Garmin has researched many runners of all different levels. The data values in the red or orange zones are typical for less

experienced or slower runners. The data values in the green, blue, or purple zones are typical for more experienced or faster

runners. More experienced runners tend to exhibit shorter ground contact times, lower vertical oscillation, lower vertical ratio, and

higher cadence than less experienced runners. However, taller runners typically have slightly slower cadences, longer strides, and

slightly higher vertical oscillation. Vertical ratio is your vertical oscillation divided by stride length. It is not correlated with height.

Go to www.garmin.com/runningdynamics for more information on running dynamics. For additional theories and interpretations of

running dynamics data, you can search reputable running publications and websites.

Color Zone Percentile in Zone Cadence Range Ground Contact Time Range

Purple >95 >183 spm <218 ms

Blue 70–95 174–183 spm 218–248 ms

Green 30–69 164–173 spm 249–277 ms

Orange 5–29 153–163 spm 278–308 ms

Red <5 <153 spm >308 ms

Ground Contact Time Balance Data

Ground contact time balance measures your running symmetry and appears as a percentage of your total ground contact time. For

example, 51.3% with an arrow pointing left indicates the runner is spending more time on the ground when on the left foot. If your

data screen displays both numbers, for example 48–52, 48% is the left foot and 52% is the right foot.

Color Zone Red Orange Green Orange Red

Symmetry Poor Fair Good Fair Poor

Percent of Other Runners 5% 25% 40% 25% 5%

Ground Contact Time Balance >52.2% L 50.8–52.2% L 50.7% L–50.7% R 50.8–52.2% R >52.2% R

While developing and testing running dynamics, the Garmin team found correlations between injuries and greater imbalances with

certain runners. For many runners, ground contact time balance tends to deviate further from 50–50 when running up or down hills.

Most running coaches agree that a symmetrical running form is good. Elite runners tend to have quick and balanced strides.

You can watch the color gauge or data field during your run or view the summary on your Garmin Connect account after your run.

As with the other running dynamics data, ground contact time balance is a quantitative measurement to help you learn about your

running form.

Vertical Oscillation and Vertical Ratio Data

The data ranges for vertical oscillation and vertical ratio are slightly different depending on the sensor and whether it is positioned at

the chest (HRM-Tri or HRM-Run

™

accessories) or at the waist (Running Dynamics Pod accessory).

Color Zone Percentile in Zone Vertical Oscillation Range at

Chest

Vertical Oscillation Range at

Waist

Vertical Ratio at Chest Vertical Ratio at Waist

Purple >95 <6.4 cm <6.8 cm <6.1% <6.5%

Blue 70–95 6.4–8.1 cm 6.8–8.9 cm 6.1–7.4% 6.5–8.3%

Green 30–69 8.2–9.7 cm 9.0–10.9 cm 7.5–8.6% 8.4–10.0%

Orange 5–29 9.8–11.5 cm 11.0–13.0 cm 8.7–10.1% 10.1–11.9%

Red <5 >11.5 cm >13.0 cm >10.1% >11.9%

Heart Rate Features 25

Tips for Missing Running Dynamics Data

If running dynamics data does not appear, you can try these

tips.

• Make sure you have a running dynamics accessory, such as

the HRM-Tri accessory.

Accessories with running dynamics have on the front of the

module.

• Pair the running dynamics accessory with your Descent

device again, according to the instructions.

• If the running dynamics data display shows only zeros, make

sure the accessory is worn right-side up.

NOTE: Ground contact time and balance appears only while

running. It is not calculated while walking.

Performance Measurements

These performance measurements are estimates that can help

you track and understand your training activities and race

performances. The measurements require a few activities using

wrist-based heart rate or a compatible chest heart rate monitor.

Cycling performance measurements require a heart rate monitor

and a power meter.

These estimates are provided and supported by Firstbeat. For

more information, go to garmin.com/performance-data/running.

NOTE: The estimates may seem inaccurate at first. The device

requires you to complete a few activities to learn about your

performance.

VO2 max.: VO2 max. is the maximum volume of oxygen (in

milliliters) you can consume per minute per kilogram of body

weight at your maximum performance.

Predicted race times: Your device uses the VO2 max. estimate

and your training history to provide a target race time based

on your current state of fitness.

HRV stress test: The heart rate variability (HRV) stress test

requires a Garmin chest heart rate monitor. The device

records your heart rate variability while standing still for 3

minutes. It provides your overall stress level. The scale is 1 to

100, and a lower score indicates a lower stress level.

Performance condition: Your performance condition is a real-

time assessment after 6 to 20 minutes of activity. It can be

added as a data field so you can view your performance

condition during the rest of your activity. It compares your

real-time condition to your average fitness level.

Functional threshold power (FTP): The device uses your user

profile information from the initial setup to estimate your FTP.

For a more accurate rating, you can conduct a guided test.

Lactate threshold: Lactate threshold requires a chest heart rate

monitor. Lactate threshold is the point where your muscles

start to rapidly fatigue. Your device measures your lactate

threshold level using heart rate data and pace.

Turning Off Performance Notifications

Some performance notifications appear upon completion of your

activity. Some performance notifications appear during an

activity or when you achieve a new performance measurement,

such as a new VO2 max. estimate. You can turn off the

performance condition feature to avoid some of these

notifications.

Hold MENU.

Select Physiological Metrics > Perf. Condition.

Detecting Performance Measurements Automatically

The Auto Detection feature is turned on by default. The device

can automatically detect your maximum heart rate and lactate

threshold during an activity. When paired with a compatible

power meter, the device can automatically detect your functional

threshold power (FTP) during an activity.

NOTE: The device detects a maximum heart rate only when

your heart rate is higher than the value set in your user profile.

Hold MENU.

Select Physiological Metrics > Auto Detection.

Select an option.

Syncing Activities and Performance Measurements

You can sync activities and performance measurements from

other Garmin devices to your Descent Mk2i device using your

Garmin Connect account. This allows your device to more

accurately reflect your training status and fitness. For example,

you can record a ride with an Edge device, and view your

activity details and overall training load on your Descent Mk2i

device.

Hold MENU.

Select Physiological Metrics > TrueUp.

When you sync your device with your smartphone, recent

activities and performance measurements from your other

Garmin devices appear on your Descent Mk2i device.

About VO2 Max. Estimates

VO2 max. is the maximum volume of oxygen (in milliliters) you

can consume per minute per kilogram of body weight at your

maximum performance. In simple terms, VO2 max. is an

indication of athletic performance and should increase as your

level of fitness improves. The Descent Mk2i device requires

wrist-based heart rate or a compatible chest heart rate monitor

to display your VO2 max. estimate. The device has separate

VO2 max. estimates for running and cycling. You must run

either outside with GPS or ride with a compatible power meter at

a moderate level of intensity for several minutes to get an

accurate VO2 max. estimate.

On the device, your VO2 max. estimate appears as a number,

description, and position on the color gauge. On your Garmin

Connect account, you can view additional details about your

VO2 max. estimate, including your fitness age. Your fitness age

gives you an idea of how your fitness compares with a person of

the same gender and different age. As you exercise, your fitness

age can decrease over time.

Purple Superior

Blue Excellent

Green Good

Orange Fair

Red Poor

VO2 max. data is provided by FirstBeat. VO2 max. analysis is

provided with permission from The Cooper Institute

. For more

information, see the appendix (VO2 Max. Standard Ratings,

page 58), and go to www.CooperInstitute.org.

Getting Your VO2 Max. Estimate for Running

This feature requires wrist-based heart rate or a compatible

chest heart rate monitor. If you are using a chest heart rate

monitor, you must put it on and pair it with your device (Pairing

Your Wireless Sensors, page 49).

For the most accurate estimate, complete the user profile setup

(Setting Up Your User Profile, page 31), and set your

maximum heart rate (Setting Your Heart Rate Zones, page 31).

26 Heart Rate Features

The estimate may seem inaccurate at first. The device requires

a few runs to learn about your running performance.

Run for at least 10 minutes outdoors.

After your run, select Save.

Select START to scroll through the performance

measurements.

Getting Your VO2 Max. Estimate for Cycling

This feature requires a power meter and wrist-based heart rate

or a compatible chest heart rate monitor. The power meter must

be paired with your Descent Mk2i device (Pairing Your Wireless

Sensors, page 49). If you are using a chest heart rate monitor,

you must put it on and pair it with your device.

For the most accurate estimate, complete the user profile setup

(Setting Up Your User Profile, page 31) and set your maximum

heart rate (Setting Your Heart Rate Zones, page 31). The

estimate may seem inaccurate at first. The device requires a few

rides to learn about your cycling performance.

Ride at a steady, high intensity for at least 20 minutes.

After your ride, select Save.

Select START to scroll through the performance

measurements.

Viewing Your Predicted Race Times

For the most accurate estimate, complete the user profile setup

(Setting Up Your User Profile, page 31), and set your

maximum heart rate (Setting Your Heart Rate Zones, page 31).

Your device uses the VO2 max. estimate (About VO2 Max.

Estimates, page 26) and your training history to provide a target

race time. The device analyzes several weeks of your training

data to refine the race time estimates.

TIP: If you have more than one Garmin device, you can enable

the Physio TrueUp

™

feature, which allows your device to sync

activities, history, and data from other devices (Syncing

Activities and Performance Measurements, page 26).

From the watch face, select UP or DOWN to view the

performance widget.

Select START to scroll through the performance

measurements.

Your projected race times appear for 5K, 10K, half marathon,

and marathon distances.

NOTE: The projections may seem inaccurate at first. The

device requires a few runs to learn about your running

performance.

About Training Effect

Training Effect measures the impact of an activity on your

aerobic and anaerobic fitness. Training Effect accumulates

during the activity. As the activity progresses, the Training Effect

value increases. Training Effect is determined by your user

profile information and training history, and heart rate, duration,

and intensity of your activity. There are seven different Training

Effect labels to describe the primary benefit of your activity.

Each label is color coded and corresponds to your training load

focus (Training Load Focus, page 29). Each feedback phrase,

for example, "Highly Impacting VO2 Max." has a corresponding

description in your Garmin Connect activity details.

Aerobic Training Effect uses your heart rate to measure how the

accumulated intensity of an exercise affects your aerobic fitness

and indicates if the workout had a maintaining or improving

effect on your fitness level. Your excess post-exercise oxygen

consumption (EPOC) accumulated during exercise is mapped to

a range of values that account for your fitness level and training

habits. Steady workouts at moderate effort or workouts involving

longer intervals (>180 sec) have a positive impact on your

aerobic metabolism and result in an improved aerobic Training

Effect.

Anaerobic Training Effect uses heart rate and speed (or power)

to determine how a workout affects your ability to perform at

very high intensity. You receive a value based on the anaerobic

contribution to EPOC and the type of activity. Repeated high-

intensity intervals of 10 to 120 seconds have a highly beneficial

impact on your anaerobic capability and result in an improved

anaerobic Training Effect.

You can add Aerobic Training Effect and Anaerobic Training

Effect as data fields to one of your training screens to monitor

your numbers throughout the activity.

Training Effect Aerobic Benefit Anaerobic Benefit

From 0.0 to 0.9 No benefit. No benefit.

From 1.0 to 1.9 Minor benefit. Minor benefit.

From 2.0 to 2.9 Maintains your aerobic

fitness.

Maintains your anaerobic

fitness.

From 3.0 to 3.9 Impacts your aerobic

fitness.

Impacts your anaerobic

fitness.

From 4.0 to 4.9 Highly impacts your

aerobic fitness.

Highly impacts your

anaerobic fitness.

5.0 Overreaching and

potentially harmful without

enough recovery time.

Overreaching and

potentially harmful without

enough recovery time.

Training Effect technology is provided and supported by

Firstbeat Technologies Ltd. For more information, go to

www.firstbeat.com.

Heart Rate Variability and Stress Level

Stress level is the result of a three-minute test performed while

standing still, where the Descent device analyzes heart rate

variability to determine your overall stress. Training, sleep,

nutrition, and general life stress all impact how a runner

performs. The stress level range is from 1 to 100, where 1 is a

very low stress state and 100 is a very high stress state.

Knowing your stress level can help you decide if your body is

ready for a tough training run or yoga.

Viewing Your Heart Rate Variability and Stress Level

This feature requires a Garmin chest heart rate monitor. Before

you can view your heart rate variability (HRV) stress level, you

must put on a heart rate monitor and pair it with your device

(Pairing Your Wireless Sensors, page 49).

TIP: Garmin recommends that you measure your stress level at

approximately the same time and under the same conditions

every day.

If necessary, select START > Add > HRV Stress to add the

stress app to the apps list.

Select Yes to add the app to your list of favorites.

From the watch face, select START > HRV Stress > START.

Stand still, and rest for 3 minutes.

Performance Condition

As you complete your activity, such as running or cycling, the

performance condition feature analyzes your pace, heart rate,

and heart rate variability to make a real-time assessment of your

ability to perform compared to your average fitness level. It is

approximately your real-time percentage deviation from your

baseline VO2 max. estimate.

Performance condition values range from -20 to +20. After the

first 6 to 20 minutes of your activity, the device displays your

performance condition score. For example, a score of +5 means

that you are rested, fresh, and capable of a good run or ride.

You can add performance condition as a data field to one of

your training screens to monitor your ability throughout the

activity. Performance condition can also be an indicator of

fatigue level, especially at the end of a long training run or ride.

NOTE: The device requires a few runs or rides with a heart rate

monitor to get an accurate VO2 max. estimate and learn about

Heart Rate Features 27

your running or riding ability (About VO2 Max. Estimates,

page 26).

Viewing Your Performance Condition

This feature requires wrist-based heart rate or a compatible

chest heart rate monitor.

Add Performance Condition to a data screen (Customizing

the Data Screens, page 41).

Go for a run or ride.

After 6 to 20 minutes, your performance condition appears.

Scroll to the data screen to view your performance condition

throughout the run or ride.

Lactate Threshold

Lactate threshold is the exercise intensity at which lactate (lactic

acid) starts to accumulate in the bloodstream. In running, it is

the estimated level of effort or pace. When a runner exceeds the

threshold, fatigue starts to increase at an accelerating rate. For

experienced runners, the threshold occurs at approximately 90%

of their maximum heart rate and between 10k and half-marathon

race pace. For average runners, the lactate threshold often

occurs well below 90% of maximum heart rate. Knowing your

lactate threshold can help you determine how hard to train or

when to push yourself during a race.

If you already know your lactate threshold heart rate value, you

can enter it in your user profile settings (Setting Your Heart Rate

Zones, page 31).

Performing a Guided Test to Determine Your Lactate

Threshold

This feature requires a Garmin chest heart rate monitor. Before

you can perform the guided test, you must put on a heart rate

monitor and pair it with your device (Pairing Your Wireless

Sensors, page 49).

The device uses your user profile information from the initial

setup and your VO2 max. estimate to estimate your lactate

threshold. The device will automatically detect your lactate

threshold during runs at a steady, high intensity with heart rate.

TIP: The device requires a few runs with a chest heart rate

monitor to get an accurate maximum heart rate value and VO2

max. estimate. If you are having trouble getting a lactate

threshold estimate, try manually lowering your maximum heart

rate value.

From the watch face, select START.

Select an outdoor running activity.

GPS is required to complete the test.

Hold MENU.

Select Training > Lactate Threshold Guided Test.

Start the timer, and follow the on-screen instructions.

After you begin your run, the device displays each step

duration, the target, and current heart rate data. A message

appears when the test is complete.

After you complete the guided test, stop the timer and save

the activity.

If this is your first lactate threshold estimate, the device

prompts you to update your heart rate zones based on your

lactate threshold heart rate. For each additional lactate

threshold estimate, the device prompts you to accept or

decline the estimate.

Getting Your FTP Estimate

Before you can get your functional threshold power (FTP)

estimate, you must pair a chest heart rate monitor and power

meter with your device (Pairing Your Wireless Sensors,

page 49), and you must get your VO2 max. estimate (Getting

Your VO2 Max. Estimate for Cycling, page 27).

The device uses your user profile information from the initial

setup and your VO2 max. estimate to estimate your FTP. The

device will automatically detect your FTP during rides at a

steady, high intensity with heart rate and power.

Select UP or DOWN to view the performance widget.

Select START to scroll through the performance

measurements.

Your FTP estimate appears as a value measured in watts per

kilogram, your power output in watts, and a position on the

color gauge.

Purple Superior

Blue Excellent

Green Good

Orange Fair

Red Untrained

For more information, see the appendix (FTP Ratings,

page 59).

NOTE: When a performance notification alerts you to a new

FTP, you can select Accept to save the new FTP, or Decline

to keep your current FTP.

Conducting an FTP Test

Before you can conduct a test to determine your functional

threshold power (FTP), you must pair a chest heart rate monitor

and a power meter with your device (Pairing Your Wireless

Sensors, page 49), and you must get your VO2 max. estimate

(Getting Your VO2 Max. Estimate for Cycling, page 27).

NOTE: The FTP test is a challenging workout that takes about

30 minutes to complete. Choose a practical and mostly flat route

that allows you to ride at a steadily increasing effort, similar to a

time trial.

From the watch face, select START.

Select a cycling activity.

Hold MENU.

Select Training > FTP Guided Test.

Follow the on-screen instructions.

After you begin your ride, the device displays each step

duration, the target, and current power data. A message

appears when the test is complete.

After you complete the guided test, complete the cool down,

stop the timer, and save the activity.

Your FTP appears as a value measured in watts per

kilogram, your power output in watts, and a position on the

color gauge.

Select an option:

• Select Accept to save the new FTP.

• Select Decline to keep your current FTP.

Training Status

These measurements are estimates that can help you track and

understand your training activities. The measurements require a

few activities using wrist-based heart rate or a compatible chest

heart rate monitor. Cycling performance measurements require

a heart rate monitor and a power meter.

These estimates are provided and supported by Firstbeat. For

more information, go to garmin.com/performance-data/running.

28 Heart Rate Features

NOTE: The estimates may seem inaccurate at first. The device

requires you to complete a few activities to learn about your

performance.

Training status: Training status shows you how your training

affects your fitness and performance. Your training status is

based on changes to your training load and VO2 max. over

an extended time period.

VO2 max.: VO2 max. is the maximum volume of oxygen (in

milliliters) you can consume per minute per kilogram of body

weight at your maximum performance. Your device displays

heat and altitude corrected VO2 max. values when you are

acclimating to high heat environemnts or high altitude.

Training load: Training load is the sum of your excess post-

exercise oxygen consumption (EPOC) over the last 7 days.

EPOC is an estimate of how much energy it takes for your

body to recover after exercise.

Training load focus: Your device analyzes and distributes your

training load into different categories based on the intensity

and structure of each activity recorded. Training load focus

includes the total load accumulated per category, and the

focus of the training. Your device displays your load

distribution over the last 4 weeks.

Recovery time: The recovery time displays how much time

remains before you are fully recovered and ready for the next

hard workout.

Training Status Levels

Training status shows you how your training affects your fitness

level and performance. Your training status is based on changes

to your training load and VO2 max. over an extended time

period. You can use your training status to help plan future

training and continue improving your fitness level.

Peaking: Peaking means that you are in ideal race condition.

Your recently reduced training load is allowing your body to

recover and fully compensate for earlier training. You should

plan ahead, since this peak state can only be maintained for

a short time.

Productive: Your current training load is moving your fitness

level and performance in the right direction. You should plan

recovery periods into your training to maintain your fitness

level.

Maintaining: Your current training load is enough to maintain

your fitness level. To see improvement, try adding more

variety to your workouts or increasing your training volume.

Recovery: Your lighter training load is allowing your body to

recover, which is essential during extended periods of hard

training. You can return to a higher training load when you

feel ready.

Unproductive: Your training load is at a good level, but your

fitness is decreasing. Your body may be struggling to

recover, so you should pay attention to your overall health

including stress, nutrition, and rest.

Detraining: Detraining occurs when you are training much less

than usual for a week or more, and it is affecting your fitness

level. You can try increasing your training load to see

improvement.

Overreaching: Your training load is very high and

counterproductive. Your body needs a rest. You should give

yourself time to recover by adding lighter training to your

schedule.

No Status: The device needs one or two weeks of training

history, including activities with VO2 max. results from

running or cycling, to determine your training status.

Tips for Getting Your Training Status

The training status feature depends on updated assessments of

your fitness level, including at least two VO2 max.

measurements per week. Your VO2 max. estimate is updated

after outdoor runs or rides with power during which your heart

rate reached at least 70% of your maximum heart rate for

several minutes. The trail run and indoor run activities do not

generate a VO2 max. estimate in order to preserve the accuracy

of your fitness level trend.

To get the most out of the training status feature, you can try

these tips.

• At least two times per week, run or ride outdoors with a

power meter, and reach a heart rate higher than 70% of your

maximum heart rate for at least 10 minutes.

After using the device for one week, your training status

should be available.

• Record all of your fitness activities on this device, or enable

the Physio TrueUp feature, allowing your device to learn

about your performance (Syncing Activities and Performance

Measurements, page 26).

Heat and Altitude Performance Acclimation

Environmental factors such as high temperature and altitude

impact your training and performance. For example, high

altitude training can have a positive impact on your fitness, but

you may notice a temporary VO2 max. decline while exposed to

high altitudes. Your Descent Mk2i device provides acclimation

notifications and corrections to your VO2 max. estimate and

training status when the temperature is above 22ºC (72ºF) and

when the altitude is above 800 m (2625 ft.). You can keep track

of your heat and altitude acclimation in the training status

widget.

NOTE: The heat acclimation feature is available only for GPS

activities and requires weather data from your connected

smartphone.

Training Load

Training load is a measurement of your training volume over the

last seven days. It is the sum of your excess post-exercise

oxygen consumption (EPOC) measurements for the last seven

days. The gauge indicates whether your current load is low,

high, or within the optimal range to maintain or improve your

fitness level. The optimal range is determined based on your

individual fitness level and training history. The range adjusts as

your training time and intensity increase or decrease.

Training Load Focus

In order to maximize performance and fitness gains, training

should be distributed across three categories: low aerobic, high

aerobic, and anaerobic. Training load focus shows you how

much of your training is currently in each category and provides

training targets. Training load focus requires at least 7 days of

training to determine if your training load is low, optimal, or high.

After 4 weeks of training history, your training load estimate will

have more detailed target information to help you balance your

training activities.

Below targets: Your training load is lower than optimal in all

intensity categories. Try increasing the duration or frequency

of your workouts.

Low aerobic shortage: Try adding more low aerobic activities

to provide recovery and balance for your higher intensity

activities.

High aerobic shortage: Try adding more high aerobic activities

to help improve your lactate threshold and VO2 max. over

time.

Anaerobic shortage: Try adding a few more intense, anaerobic

activities to improve your speed and anaerobic capacity over

time.

Balanced: Your training load is balanced and provides all-

around fitness benefits as you continue training.

Low aerobic focus: Your training load is mostly low aerobic

activity. This provides a solid foundation and prepares you for

adding more intense workouts.

Heart Rate Features 29

High aerobic focus: Your training load is mostly high aerobic

activity. These activities help to improve lactate threshold,

VO2 max., and endurance.

Anaerobic focus: Your training load is mostly intense activity.

This leads to rapid fitness gains, but should be balanced with

low aerobic activities.

Above targets: Your training load is higher than optimal, and

you should consider scaling back the duration and frequency

of your workouts.

Recovery Time

You can use your Garmin device with wrist-based heart rate or a

compatible chest heart rate monitor to display how much time

remains before you are fully recovered and ready for the next

hard workout.

NOTE: The recovery time recommendation uses your VO2 max.

estimate and may seem inaccurate at first. The device requires

you to complete a few activities to learn about your

performance.

The recovery time appears immediately following an activity.

The time counts down until it is optimal for you to attempt

another hard workout.

Viewing Your Recovery Time

For the most accurate estimate, complete the user profile setup

(Setting Up Your User Profile, page 31), and set your

maximum heart rate (Setting Your Heart Rate Zones, page 31).

Go for a run.

After your run, select Save.

The recovery time appears. The maximum time is 4 days.

NOTE: From the watch face, you can select UP or DOWN to

view the training status widget, and select START to scroll

through the metrics to view your recovery time.

Recovery Heart Rate

If you are training with wrist-based heart rate or a compatible

chest heart rate monitor, you can check your recovery heart rate

value after each activity. Recovery heart rate is the difference

between your exercising heart rate and your heart rate two

minutes after the exercise has stopped. For example, after a

typical training run, you stop the timer. Your heart rate is

140 bpm. After two minutes of no activity or cool down, your

heart rate is 90 bpm. Your recovery heart rate is 50 bpm (140

minus 90). Some studies have linked recovery heart rate to

cardiac health. Higher numbers generally indicate healthier

hearts.

TIP: For best results, you should stop moving for two minutes

while the device calculates your recovery heart rate value. You

can save or discard the activity after this value appears.

Body Battery

™

Your device analyzes your heart rate variability, stress level,

sleep quality, and activity data to determine your overall Body

Battery level. Like a gas gauge on a car, it indicates your

amount of available reserve energy. The Body Battery level

range is from 0 to 100, where 0 to 25 is low reserve energy, 26

to 50 is medium reserve energy, 51 to 75 is high reserve energy,

and 76 to 100 is very high reserve energy.

You can sync your device with your Garmin Connect account to

view your most up-to-date Body Battery level, long-term trends,

and additional details (Tips for Improved Body Battery Data,

page 30).

Viewing the Body Battery Widget

The Body Battery widget displays your current Body Battery

level and a graph of your Body Battery level for the last several

hours.

Press UP or DOWN to view the Body Battery widget.

NOTE: You may need to add the widget to your widget loop

(Customizing the Widget Loop, page 44).

Press START to view a graph of your body battery level for

the last four hours.

Press DOWN to view a combined graph of your Body Battery

and stress levels.

Blue bars indicate periods of rest. Orange bars indicate

periods of stress. Gray bars indicate times when you were

too active to determine your stress level.

Press DOWN to see your Body Battery data since midnight.

Tips for Improved Body Battery Data

• Your Body Battery level updates when you sync your device

with your Garmin Connect account.

• For more accurate results, wear the device while sleeping.

• Rest and good sleep charge your Body Battery.

• Strenuous activity, high stress, and poor sleep can cause

your Body Battery to drain.

• Food intake, as well as stimulants like caffeine, has no

impact on your Body Battery.

Pulse Oximeter

The Descent Mk2i device has a wrist-based pulse oximeter to

gauge the peripheral saturation of oxygen in your blood.

Knowing your oxygen saturation can help you determine how

your body is acclimating to high altitudes for alpine sport and

expedition.

You can manually begin a pulse oximeter reading by viewing the

pulse oximeter widget (Getting Pulse Oximeter Readings,

page 30). You can also turn on all-day readings (Turning On

All-Day Pulse Oximeter Readings, page 31). When you remain

motionless, your device analyzes your oxygen saturation and

your elevation. The elevation profile helps indicate how your

pulse oximeter readings are changing, relative to your to

elevation.

On the device, your pulse oximeter reading appears as an

oxygen saturation percentage and color on the graph. On your

Garmin Connect account, you can view additional details about

your pulse oximeter readings, including trends over multiple

days.

For more information about pulse oximeter accuracy, go to

garmin.com/ataccuracy.

The oxygen saturation percentage scale.

A graph of your average oxygen saturation readings for the last 24

hours.

Your most recent oxygen saturation reading.

The elevation scale.

A graph of your elevation readings for the last 24 hours.

Getting Pulse Oximeter Readings

You can manually begin a pulse oximeter reading by viewing the

pulse oximeter widget. The widget displays your most recent

blood oxygen saturation percentage, a graph of your hourly

average readings for the last 24 hours, and a graph of your

elevation for the last 24 hours.

30 Pulse Oximeter

NOTE: The first time you view the pulse oximeter widget, the

device must acquire satellite signals to determine your elevation.

You should go outside, and wait while the device locates

satellites.

While you are sitting or inactive, press UP or DOWN to view

the pulse oximeter widget.

Press START to view widget details and begin a pulse

oximeter reading.

Remain motionless for up to 30 seconds.

NOTE: If you are too active for the watch to get a pulse

oximeter reading, a message appears instead of a

percentage. You can check again after several minutes of

inactivity. For best results, hold the arm wearing the device at

heart level while the device reads your blood oxygen

saturation.

Press DOWN to view a graph of your pulse oximeter

readings for the last seven days.

Turning On All-Day Pulse Oximeter Readings

From the pulse oximeter widget, hold MENU.

Select Options > Pulse Ox Mode > All Day.

The device automatically analyzes your oxygen saturation

throughout the day, when you are not moving.

NOTE: Turning on all-day mode decreases battery life.

Turning Off Automatic Pulse Oximeter

Readings

From the pulse oximeter widget, hold MENU.

Select Options > Pulse Ox Mode > Off.

The device turns off automatic pulse oximeter readings. The

device begins a pulse oximeter reading when you view the

pulse oximeter widget.

Turning On Pulse Oximeter Sleep Tracking

You can set your device to continuously measure your blood

oxygen saturation while you sleep.

NOTE: Unusual sleep positions can cause abnormally low

sleep-time SpO2 readings.

From the pulse oximeter widget, hold MENU.

Select Options > Pulse Ox Mode > During Sleep.

Tips for Erratic Pulse Oximeter Data

If the pulse oximeter data is erratic or does not appear, you can

try these tips.

• Remain motionless while the device reads your blood oxygen

saturation.

• Wear the device above your wrist bone. The device should

be snug but comfortable.

• Hold the arm wearing the device at heart level while the

device reads your blood oxygen saturation.

• Use a silicone band.

• Clean and dry your arm before putting on the device.

• Avoid wearing sunscreen, lotion, and insect repellent under

the device.

• Avoid scratching the optical sensor on the back of the device.

• Rinse the device with fresh water after each workout.

Training

Setting Up Your User Profile

You can update your gender, birth year, height, weight, heart

rate zone, and power zone settings. The device uses this

information to calculate accurate training data.

Hold MENU.

Select User Profile.

Select an option.

Fitness Goals

Knowing your heart rate zones can help you measure and

improve your fitness by understanding and applying these

principles.

• Your heart rate is a good measure of exercise intensity.

• Training in certain heart rate zones can help you improve

cardiovascular capacity and strength.

If you know your maximum heart rate, you can use the table

(Heart Rate Zone Calculations, page 32) to determine the best

heart rate zone for your fitness objectives.

If you do not know your maximum heart rate, use one of the

calculators available on the Internet. Some gyms and health

centers can provide a test that measures maximum heart rate.

The default maximum heart rate is 220 minus your age.

About Heart Rate Zones

Many athletes use heart rate zones to measure and increase

their cardiovascular strength and improve their level of fitness. A

heart rate zone is a set range of heartbeats per minute. The five

commonly accepted heart rate zones are numbered from 1 to 5

according to increasing intensity. Generally, heart rate zones are

calculated based on percentages of your maximum heart rate.

Setting Your Heart Rate Zones

The device uses your user profile information from the initial

setup to determine your default heart rate zones. You can set

separate heart rate zones for sport profiles, such as running,

cycling, and swimming. For the most accurate calorie data

during your activity, set your maximum heart rate. You can also

set each heart rate zone and enter your resting heart rate

manually. You can manually adjust your zones on the device or

using your Garmin Connect account.

Hold MENU.

Select User Profile > Heart Rate.

Select Max. HR, and enter your maximum heart rate.

You can use the Auto Detection feature to automatically

record your maximum heart rate during an activity (Detecting

Performance Measurements Automatically, page 26).

Select LTHR > Enter Manually, and enter your lactate

threshold heart rate.

You can perform a guided test to estimate your lactate

threshold (Lactate Threshold, page 28). You can use the

Auto Detection feature to automatically record your lactate

threshold during an activity (Detecting Performance

Measurements Automatically, page 26).

Select Resting HR, and enter your resting heart rate.

You can use the average resting heart rate measured by your

device, or you can set a custom resting heart rate.

Select Zones > Based On.

Select an option:

• Select BPM to view and edit the zones in beats per

minute.

• Select %Max. HR to view and edit the zones as a

percentage of your maximum heart rate.

Training 31

• Select %HRR to view and edit the zones as a percentage

of your heart rate reserve (maximum heart rate minus

resting heart rate).

• Select %LTHR to view and edit the zones as a percentage

of your lactate threshold heart rate.

Select a zone, and enter a value for each zone.

Select Add Sport Heart Rate, and select a sport profile to

add separate heart rate zones (optional).

Repeat the steps to add sport heart rate zones (optional).

Letting the Device Set Your Heart Rate Zones

The default settings allow the device to detect your maximum

heart rate and set your heart rate zones as a percentage of your

maximum heart rate.

• Verify that your user profile settings are accurate (Setting Up

Your User Profile, page 31).

• Run often with the wrist or chest heart rate monitor.

• Try a few heart rate training plans, available from your

Garmin Connect account.

• View your heart rate trends and time in zones using your

Garmin Connect account.

Heart Rate Zone Calculations

Zone % of

Maximum

Heart Rate

Perceived Exertion Benefits

1 50–60% Relaxed, easy pace,

rhythmic breathing

Beginning-level

aerobic training,

reduces stress

2 60–70% Comfortable pace,

slightly deeper

breathing, conversation

possible

Basic cardiovascular

training, good

recovery pace

3 70–80% Moderate pace, more

difficult to hold

conversation

Improved aerobic

capacity, optimal

cardiovascular training

4 80–90% Fast pace and a bit

uncomfortable, breathing

forceful

Improved anaerobic

capacity and

threshold, improved

speed

5 90–100% Sprinting pace,

unsustainable for long

period of time, labored

breathing

Anaerobic and

muscular endurance,

increased power

Setting Your Power Zones

The values for the zones are default values based on gender,

weight, and average ability, and may not match your personal

abilities. If you know your functional threshold power (FTP)

value, you can enter it and allow the software to calculate your

power zones automatically. You can manually adjust your zones

on the device or using your Garmin Connect account.

Hold MENU.

Select User Profile > Power Zones > Based On.

Select an option:

• Select Watts to view and edit the zones in watts.

• Select % FTP to view and edit the zones as a percentage

of your functional threshold power.

Select FTP, and enter your FTP value.

Select a zone, and enter a value for each zone.

If necessary, select Minimum, and enter a minimum power

value.

Activity Tracking

The activity tracking feature records your daily step count,

distance traveled, intensity minutes, floors climbed, calories

burned, and sleep statistics for each recorded day. Your calories

burned includes your base metabolism plus activity calories.

The number of steps taken during the day appears on the steps

widget. The step count is updated periodically.

For more information about activity tracking and fitness metric

accuracy, go to garmin.com/ataccuracy.

Auto Goal

Your device creates a daily step goal automatically, based on

your previous activity levels. As you move during the day, the

device shows your progress toward your daily goal .

If you choose not to use the auto goal feature, you can set a

personalized step goal on your Garmin Connect account.

Using the Move Alert

Sitting for prolonged periods of time can trigger undesirable

metabolic state changes. The move alert reminds you to keep

moving. After one hour of inactivity, Move! and the red bar

appear. Additional segments appear after every 15 minutes of

inactivity. The device also beeps or vibrates if audible tones are

turned on (System Settings, page 48).

Go for a short walk (at least a couple of minutes) to reset the

move alert.

Sleep Tracking

While you are sleeping, the device automatically detects your

sleep and monitors your movement during your normal sleep

hours. You can set your normal sleep hours in the user settings

on your Garmin Connect account. Sleep statistics include total

hours of sleep, sleep levels, and sleep movement. You can view

your sleep statistics on your Garmin Connect account.

NOTE: Naps are not added to your sleep statistics. You can use

do not disturb mode to turn off notifications and alerts, with the

exception of alarms (Using Do Not Disturb Mode, page 32).

Using Automated Sleep Tracking

Wear your device while sleeping.

Upload your sleep tracking data to the Garmin Connect site

(Manually Syncing Data with Garmin Connect, page 20).

You can view your sleep statistics on your Garmin Connect

account.

Using Do Not Disturb Mode

You can use do not disturb mode to turn off the backlight, tone

alerts, and vibration alerts. For example, you can use this mode

while sleeping or watching a movie.

NOTE: You can set your normal sleep hours in the user settings

on your Garmin Connect account. You can enable the During

Sleep option in the system settings to automatically enter do not

disturb mode during your normal sleep hours (System Settings,

page 48).

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT.

Select .

Intensity Minutes

To improve your health, organizations such as the World Health

Organization recommend at least 150 minutes per week of

32 Training

moderate intensity activity, such as brisk walking, or 75 minutes

per week of vigorous intensity activity, such as running.

The device monitors your activity intensity and tracks your time

spent participating in moderate to vigorous intensity activities

(heart rate data is required to quantify vigorous intensity). You

can work toward achieving your weekly intensity minutes goal by

participating in at least 10 consecutive minutes of moderate to

vigorous intensity activities. The device adds the amount of

moderate activity minutes with the amount of vigorous activity

minutes. Your total vigorous intensity minutes are doubled when

added.

Earning Intensity Minutes

Your Descent Mk2i device calculates intensity minutes by

comparing your heart rate data to your average resting heart

rate. If heart rate is turned off, the device calculates moderate

intensity minutes by analyzing your steps per minute.

• Start a timed activity for the most accurate calculation of

intensity minutes.

• Exercise for at least 10 consecutive minutes at a moderate or

vigorous intensity level.

• Wear your device all day and night for the most accurate

resting heart rate.

Garmin Move IQ

™

When your movements match familiar exercise patterns, the

Move IQ feature automatically detects the event and displays it

in your timeline. The Move IQ events show activity type and

duration, but they do not appear in your activities list or

newsfeed. For more detail and accuracy, you can record a timed

activity on your device.

Activity Tracking Settings

Hold MENU, and select Activity Tracking.

Status: Turns off the activity tracking features.

Move Alert: Displays a message and the move bar on the

digital watch face and steps screen. The device also beeps

or vibrates if audible tones are turned on (System Settings,

page 48).

Goal Alerts: Allows you to turn on and off goal alerts, or turn

them off only during activities. Goal alerts appear for your

daily steps goal, daily floors climbed goal, and weekly

intensity minutes goal.

Move IQ: Allows you to turn on and off Move IQ events.

Pulse Ox Mode: Sets your device to record pulse oximeter

readings while you are inactive during the day or

continuously while you sleep.

Turning Off Activity Tracking

When you turn off activity tracking, your steps, floors climbed,

intensity minutes, sleep tracking, and Move IQ events are not

recorded.

Hold MENU.

Select Activity Tracking > Status > Off.

Workouts

You can create custom workouts that include goals for each

workout step and for varied distances, times, and calories.

During your activity, you can view workout-specific data screens

that contain workout step information, such as the workout step

distance or average step pace.

Your device includes several preloaded workouts for multiple

activities. You can create and find more workouts using Garmin

Connect, or select a training plan that has built-in workouts and

transfer them to your device.

You can schedule workouts using Garmin Connect. You can

plan workouts in advance and store them on your device.

Following a Workout From Garmin Connect

Before you can download a workout from Garmin Connect, you

must have a Garmin Connect account (Garmin Connect,

page 19).

Select an option:

• Open the Garmin Connect app.

• Go to connect.garmin.com.

Select Training > Workouts.

Find a workout, or create and save a new workout.

Select or Send to Device.

Follow the on-screen instructions.

Starting a Workout

Your device can guide you through multiple steps in a workout.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > My Workouts.

Select a workout.

NOTE: Only workouts that are compatible with the selected

activity appear in the list.

Select View to view a list of workout steps (optional).

TIP: While viewing workout steps, you can press START to

view an animation of the selected exercise, if available.

Select Do Workout.

Press START to start the activity timer.

After you begin a workout, the device displays each step of the

workout, step notes (optional), the target (optional), and the

current workout data. For strength, yoga, cardio, or Pilates

activities, an instructional animation appears.

About the Training Calendar

The training calendar on your device is an extension of the

training calendar or schedule you set up in Garmin Connect.

After you have added a few workouts to the Garmin Connect

calendar, you can send them to your device. All scheduled

workouts sent to the device appear in the calendar widget.

When you select a day in the calendar, you can view or do the

workout. The scheduled workout stays on your device whether

you complete it or skip it. When you send scheduled workouts

from Garmin Connect, they overwrite the existing training

calendar.

Using Garmin Connect Training Plans

Before you can download and use a training plan from Garmin

Connect, you must have a Garmin Connect account (Garmin

Connect, page 19), and you must pair the Descent device with a

compatible smartphone.

From the Garmin Connect app, select or .

Select Training > Training Plans.

Select and schedule a training plan.

Follow the on-screen instructions.

Review the training plan in your calendar.

Adaptive Training Plans

Your Garmin Connect account has an adaptive training plan and

Garmin coach to fit your training goals. For example, you can

answer a few questions and find a plan to help you complete a 5

km race. The plan adjusts to your current level of fitness,

coaching and schedule preferences, and race date. When you

start a plan, the Garmin Coach widget is added to the widget

loop on your Descent device.

Starting Today's Workout

After you send a Garmin Coach training plan to your device, the

Garmin Coach widget appears in your widget loop.

Training 33

From the watch face, select UP or DOWN to view the Garmin

Coach widget.

If a workout for this activity is scheduled for today, the device

shows the workout name and prompts you to start it.

Select START.

Select View to view the workout steps (optional).

Select Do Workout.

Follow the on-screen instructions.

Interval Workouts

You can create interval workouts based on distance or time. The

device saves your custom interval workout until you create

another interval workout. You can use open intervals for track

workouts and when you are running a known distance.

Creating an Interval Workout

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Intervals > Edit > Interval > Type.

Select Distance, Time, or Open.

TIP: You can create an open-ended interval by selecting the

Open option.

If necessary, select Duration, enter a distance or time

interval value for the workout, and select .

Press BACK.

Select Rest > Type.

Select Distance, Time, or Open.

If necessary, enter a distance or time value for the rest

interval, and select .

Press BACK.

Select one or more options:

• To set the number of repetitions, select Repeat.

• To add an open-ended warm up to your workout, select

Warm Up > On.

• To add an open-ended cool down to your workout, select

Cool Down > On.

Starting an Interval Workout

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Intervals > Do Workout.

Press START to start the activity timer.

When your interval workout has a warm up, press LAP to

begin the first interval.

Follow the on-screen instructions.

After you complete all of the intervals, a message appears.

Stopping an Interval Workout

• At any time, select LAP to stop the current interval or rest

period and transition to the next interval or rest period.

• After all intervals and rest periods are complete, select LAP

to end the interval workout and transition to a timer that can

be used for cool down.

• At any time, select STOP to stop the activity timer. You can

resume the timer or end the interval workout.

PacePro Training

Many runners like to wear a pace band during a race to help

achieve their race goal. The PacePro feature allows you to

create a custom pace band based on distance and pace or

distance and time. You can also create a pace band for a known

course to maximize your pace effort based on elevation

changes.

You can create a PacePro plan using the Garmin Connect app.

You can preview the splits and elevation plot before you run the

course.

Downloading a PacePro Plan from Garmin Connect

Before you can download a PacePro plan from Garmin Connect,

you must have a Garmin Connect account (Garmin Connect,

page 19).

Select an option:

• Open the Garmin Connect app, and select or .

• Go to connect.garmin.com.

Select Training > PacePro Pacing Strategies.

Follow the on-screen instructions to create and save a

PacePro plan.

Select or Send to Device.

Starting a PacePro Plan

Before you can start a PacePro plan, you must download a plan

from your Garmin Connect account.

From the watch face, press START.

Select an outdoor running activity.

Hold MENU.

Select Training > PacePro Plans.

Select a plan.

TIP: You can press DOWN and select View Splits to preview

the splits.

Press START to start the plan.

Press START to start the activity timer.

The device displays your target split pace , current split

pace , completion progress for the split , distance

remaining in the split , and overall time ahead or behind of

your target pace .

Stopping a PacePro Plan

Hold MENU.

Select Stop PacePro > Yes.

The device stops the PacePro plan. The activity timer

continues running.

Creating a PacePro Plan on Your Watch

Before you can create a PacePro plan on your watch, you must

create a course (Creating and Following a Course on Your

Device, page 37).

From the watch face, press START.

Select an outdoor running activity.

Hold MENU.

Select Training > PacePro Plans > Create New.

Select a course.

Select an option:

• Select Goal Pace, and enter your target pace.

• Select Goal Time, and enter your target time.

34 Training

The device displays your custom pace band.

TIP: You can press DOWN and select View Splits to preview

the splits.

Press START to start the plan.

Press START to start the activity timer.

Segments

You can send running or cycling segments from your Garmin

Connect account to your device. After a segment is saved to

your device, you can race a segment, trying to match or exceed

your personal record or other participants who have raced the

segment.

NOTE: When you download a course from your Garmin

Connect account, you can download all of the available

segments in the course.

Strava

™

Segments

You can download Strava segments to your Descent Mk2i

device. Follow Strava segments to compare your performance

with your past rides, friends, and pros who have ridden the

same segment.

To sign up for a Strava membership, go to the segments widget

in your Garmin Connect account. For more information, go to

www.strava.com.

The information in this manual applies to both Garmin Connect

segments and Strava segments.

Viewing Segment Details

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Segments.

Select a segment.

Select an option:

• Select Race Time to view the time and average speed or

pace for the segment leader.

• Select Map to view the segment on the map.

• Select Elevation Plot to view an elevation plot of the

segment.

Racing a Segment

Segments are virtual race courses. You can race a segment,

and compare your performance to past activities, others'

performance, connections in your Garmin Connect account, or

other members of the running or cycling communities. You can

upload your activity data to your Garmin Connect account to

view your segment position.

NOTE: If your Garmin Connect account and Strava account are

linked, your activity is automatically sent to your Strava account

so you can review the segment position.

From the watch face, press START.

Select an activity.

Go for a run or ride.

When you approach a segment, a message appears, and

you can race the segment.

Start racing the segment.

A message appears when the segment is complete.

Setting a Segment to Adjust Automatically

You can set your device to automatically adjust the target race

time of a segment based on your performance during the

segment.

NOTE: This setting is enabled for all segments by default.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Segments > Auto Effort.

Using Virtual Partner

Your Virtual Partner is a training tool designed to help you meet

your goals. You can set a pace for the Virtual Partner and race

against it.

NOTE: This feature is not available for all activities.

Hold MENU.

Select Activities & Apps.

Select an activity.

Select the activity settings.

Select Data Screens > Add New > Virtual Partner.

Enter a pace or speed value.

Press UP or DOWN to change the location of the Virtual

Partner screen (optional).

Start your activity (Starting an Activity, page 12).

Press UP or DOWN to scroll to the Virtual Partner screen and

see who is leading.

Setting a Training Target

The training target feature works with the Virtual Partner feature

so you can train toward a set distance, distance and time,

distance and pace, or distance and speed goal. During your

training activity, the device gives you real-time feedback about

how close you are to achieving your training target.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Set a Target.

Select an option:

• Select Distance Only to select a preset distance or enter

a custom distance.

• Select Distance and Time to select a distance and time

target.

• Select Distance and Pace or Distance and Speed to

select a distance and pace or speed target.

The training target screen appears and displays your

estimated finish time. The estimated finish time is based on

your current performance and the time remaining.

Press START to start the activity timer.

Cancelling a Training Target

During an activity, hold MENU.

Select Cancel Target > Yes.

Racing a Previous Activity

You can race a previously recorded or downloaded activity. This

feature works with the Virtual Partner feature so you can see

how far ahead or behind you are during the activity.

NOTE: This feature is not available for all activities.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Training > Race an Activity.

Select an option:

• Select From History to select a previously recorded

activity from your device.

• Select Downloaded to select an activity you downloaded

from your Garmin Connect account.

Select the activity.

Training 35

The Virtual Partner screen appears indicating your estimated

finish time.

Press START to start the activity timer.

After you complete your activity, press STOP, and select

Save.

Personal Records

When you complete an activity, the device displays any new

personal records you achieved during that activity. Personal

records include your fastest time over several typical race

distances and longest run, ride, or swim.

NOTE: For cycling, personal records also include most ascent

and best power (power meter required).

Viewing Your Personal Records

From the watch face, hold MENU.

Select History > Records.

Select a sport.

Select a record.

Select View Record.

Restoring a Personal Record

You can set each personal record back to the one previously

recorded.

From the watch face, hold MENU.

Select History > Records.

Select a sport.

Select a record to restore.

Select Previous > Yes.

NOTE: This does not delete any saved activities.

Clearing a Personal Record

From the watch face, hold MENU.

Select History > Records.

Select a sport.

Select a record to delete.

Select Clear Record > Yes.

NOTE: This does not delete any saved activities.

Clearing All Personal Records

From the watch face, hold MENU.

Select History > Records.

Select a sport.

Select Clear All Records > Yes.

The records are deleted for that sport only.

NOTE: This does not delete any saved activities.

Clocks

Setting an Alarm

You can set multiple alarms.

From the watch face, hold MENU.

Select Clocks > ALARMS > Add Alarm.

Enter the alarm time.

Editing an Alarm

From the watch face, hold MENU.

Select Clocks > ALARMS > Edit.

Select an alarm.

Select an option:

• To turn the alarm on or off, select Status.

• To change the alarm time, select Time.

• To set the alarm to repeat regularly, select Repeat, and

select when the alarm should repeat.

• To select the type of alarm notification, select Sounds.

• To turn the backlight on or off with the alarm, select

Backlight.

• To select a description for the alarm, select Label.

• To delete the alarm, select Delete.

Starting the Countdown Timer

From the watch face, hold MENU.

Select Clocks > TIMERS.

Select an option:

• To set and save a countdown timer for the first time, enter

the time, press MENU, and select Save Timer.

• To set and save additional countdown timers, select Add

Timer, and enter the time.

• To set a countdown timer without saving it, select Quick

Timer, and enter the time.

If necessary, press MENU, and select an option:

• Select Time to change the time.

• Select Restart > On to automatically restart the timer after

it expires.

• Select Sounds, and select a type of notification.

Press START to start the timer.

Deleting a Timer

From the watch face, hold MENU.

Select Clocks > TIMERS > Edit.

Select a timer.

Select Delete.

Using the Stopwatch

From the watch face, hold MENU.

Select Clocks > STOPWATCH.

Press START to start the timer.

Press LAP to restart the lap timer .

The total stopwatch time continues running.

Press STOP to stop both timers.

Select an option:

• To reset both timers, press DOWN.

• To save the stopwatch time as an activity, press MENU,

and select Save Activity.

• To reset the timers and exit the stopwatch, press MENU,

and select Done.

• To review the lap timers, press MENU, and select Review.

NOTE: The Review option only appears if there have

been multiple laps.

• To return to the watch face without resetting the timers,

press MENU, and select Go to Watchface.

• To enable or disable lap recording, press MENU, and

select Lap Key.

36 Clocks

Adding Alternate Time Zones

You can display the current time of day in additional time zones

on the alternate time zones widget. You can add up to four

alternate time zones.

NOTE: You may need to add the alternate time zones widget to

the widget loop (Customizing the Widget Loop, page 44).

From the watch face, hold MENU.

Select Clocks > ALT. TIME ZONES > Add Alt. Time Zone.

Select a time zone.

If necessary, rename the zone.

Editing an Alternate Time Zone

From the watch face, hold MENU.

Select Clocks > ALT. TIME ZONES > Edit.

Select a time zone.

Select an option:

• To enter a custom name for the time zone, select Rename

Zone.

• To change the time zone, select Change Zone.

• To change the location of the time zone in the widget,

select Reorder Zone.

• To delete the time zone, select Delete Zone.

Navigation

Saving Your Location

You can save your current location to navigate back to it later.

NOTE: You can add options to the controls menu (Customizing

the Controls Menu, page 45).

Hold LIGHT.

Select .

Follow the on-screen instructions.

Editing Your Saved Locations

You can delete a saved location or edit its name, elevation, and

position information.

From the watch face, press START.

Select Navigate > Saved Locations.

Select a saved location.

Select an option to edit the location.

Projecting a Waypoint

You can create a new location by projecting the distance and

bearing from your current location to a new location.

NOTE: You may need to add the Project Wpt. app to the

activities and apps list.

From the watch face, press START.

Select Project Wpt..

Press UP or DOWN to set the heading.

Press START.

Press DOWN to select a unit of measure.

Press UP to enter the distance.

Press START to save.

The projected waypoint is saved with a default name.

Navigating to a Destination

You can use your device to navigate to a destination or follow a

course.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation.

Select a category.

Respond to the on-screen prompts to choose a destination.

Select Go To.

Navigation information appears.

Press START to begin navigation.

Navigating to a Point of Interest

If the map data installed on your device includes points of

interest, you can navigate to them.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Points of Interest, and select a

category.

A list of points of interest near your current location appears.

If necessary, select an option:

• To search near a different location, select Search Near,

and select a location.

• To search for a point of interest by name, select Spell

Search, enter a name, select Search Near, and select a

location.

Select a point of interest from the search results.

Select Go.

Navigation information appears.

Press START to begin navigation.

Points of Interest

A point of interest is a place that you may find useful or

interesting. Points of interest are organized by category and can

include popular travel destinations such as gas stations,

restaurants, hotels, and entertainment venues.

Creating and Following a Course on Your

Device

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Courses > Create New.

Enter a name for the course, and select .

Select Add Location.

Select an option.

If necessary, repeat steps 6 and 7.

Select Done > Do Course.

Navigation information appears.

Press START to begin navigation.

Creating a Round-Trip Course

The device can create a round-trip course based on a specified

distance and direction of navigation.

From the watch face, press START.

Select Run or Bike.

Hold MENU.

Select Navigation > Round-Trip Course.

Enter the total distance for the course.

Select a direction heading.

The device creates up to three courses. You can press

DOWN to view the courses.

Navigation 37

Press START to select a course.

Select an option:

• To begin navigation, select Go.

• To view the course on the map and pan or zoom the map,

select Map.

• To view a list of turns in the course, select Turn By Turn.

• To view an elevation plot of the course, select Elevation

Plot.

• To save the course, select Save.

• To view a list of ascents in the course, select View

Climbs.

Viewing or Editing Course Details

You can view or edit course details before you navigate a

course.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Courses.

Press START to select a course.

Select an option:

• To begin navigation, select Do Course.

• To view the course on the map and pan or zoom the map,

select Map.

• To begin the course in reverse, select Do Course in

Reverse.

• To view an elevation plot of the course, select Elevation

Plot.

• To change the course name, select Name.

• To edit the course path, select Edit.

• To view a list of ascents in the course, select View

Climbs.

• To delete the course, select Delete.

Using ClimbPro

The ClimbPro feature helps you manage your effort for the

upcoming climbs on a course. Before your activity, you can view

details about the climbs, including when they occur, average

gradient, and total ascent. The climb categories, based on

length and gradient, are indicated by color.

Enable the ClimbPro feature for the activity (Activities and

App Settings, page 40).

Review the climbs and course details for the course (Viewing

or Editing Course Details, page 38).

Start following a saved course (Navigating to a Destination,

page 37).

At the start of a climb, the ClimbPro screen appears

automatically.

Marking and Starting Navigation to a Man

Overboard Location

You can save a man overboard (MOB) location, and

automatically start navigation back to it.

TIP: You can customize the hold function of the keys to access

the MOB function (Customizing the Hot Keys, page 49).

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Last MOB.

Navigation information appears.

Navigating with Sight 'N Go

You can point the device at an object in the distance, such as a

water tower, lock in the direction, and then navigate to the

object.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Sight 'N Go.

Point the top of the watch at an object, and press START.

Navigation information appears.

Press START to begin navigation.

Navigating to Your Starting Point During an

Activity

You can navigate back to the starting point of your current

activity in a straight line or along the path you traveled. This

feature is available only for activities that use GPS.

During an activity, press STOP.

Select Back to Start, and select an option:

• To navigate back to the starting point of your activity along

the path you traveled, select TracBack.

• If you do not have a supported map or are using direct

routing, select Route to navigate back to the starting point

of your activity in a straight line.

• If you are not using direct routing, select Route to

navigate back to the starting point of your activity using

turn-by-turn directions.

Your current location , the track to follow , and your

destination appear on the map.

Viewing Route Directions

You can view a list of turn-by-turn directions for your route.

While navigating a route, hold MENU.

Select Turn By Turn.

A list of turn-by-turn directions appears.

Press DOWN to view additional directions.

Navigating to the Starting Point of a Saved

Activity

You can navigate back to the starting point of a saved activity in

a straight line or along the path you traveled. This feature is

available only for activities that use GPS.

From the watch face, press START.

Select an activity.

Hold MENU.

Select Navigation > Activities.

Select an activity.

Select Back to Start, and select an option:

• To navigate back to the starting point of your activity along

the path you traveled, select TracBack.

38 Navigation

• If you do not have a supported map or are using direct

routing, select Route to navigate back to the starting point

of your activity in a straight line.

• If you are not using direct routing, select Route to

navigate back to the starting point of your activity using

turn-by-turn directions.

Turn-by-turn directions help you navigate to the starting point

of your last saved activity if you have a supported map or are

using direct routing. A line appears on the map from your

current location to the starting point of the last saved activity

if you are not using direct routing.

NOTE: You can start the timer to prevent the device from

timing out to watch mode.

Press DOWN to view the compass (optional).

The arrow points toward your starting point.

Stopping Navigation

During an activity, hold MENU.

Select Stop Navigation.

Map

Your device comes preloaded with maps and can display

several types of Garmin map data, including topographical

contours, nearby points of interest, ski resort maps, and golf

courses.

To purchase additional map data and view compatibility

information, go to garmin.com/maps.

represents your location on the map. When you are navigating

to a destination, your route is marked with a line on the map.

Viewing the Map

Start an outdoor activity.

Press UP or DOWN to scroll to the map screen.

Hold MENU, and select an option:

• To pan or zoom the map, select Pan/Zoom.

TIP: You can press START to toggle between panning up

and down, panning left and right, or zooming. You can

hold START to select the point indicated by the

crosshairs.

• To see nearby points of interest and waypoints, select

Around Me.

Saving or Navigating to a Location on the Map

You can select any location on the map. You can save the

location or start navigating to it.

From the map, hold MENU.

Select Pan/Zoom.

Controls and crosshairs appear on the map.

Pan and zoom the map to center the location in the

crosshairs.

Hold START to select the point indicated by the crosshairs.

If necessary, select a nearby point of interest.

Select an option:

• To start navigating to the location, select Go.

• To save the location, select Save Location.

• To view information about the location, select Review.

Navigating with the Around Me Feature

You can use the around me feature to navigate to nearby points

of interest and waypoints.

NOTE: The map data installed on your device must include

points of interest to navigate to them.

From the map, hold MENU.

Select Around Me.

Icons indicating points of interest and waypoints appear on

the map.

Press UP or DOWN to highlight a section of the map.

Press STOP.

A list of points of interest and waypoints in the highlighted

map section appear.

Select a location.

Select an option:

• To start navigating to the location, select Go.

• To view the location on the map, select Map.

• To save the location, select Save Location.

• To view information about the location, select Review.

Changing the Map Theme

You can change the map theme to display map data optimized

for your activity type. For example, high contrast map themes

provide better visibility in challenging environments, and activity-

specific map themes display the most important map data at-a-

glance.

Start an outdoor activity.

Hold MENU.

Select the activity settings.

Select Map > Map Theme.

Select an option.

Compass

The device has a 3-axis compass with automatic calibration.

The compass features and appearance change depending on

your activity, whether GPS is enabled, and whether you are

navigating to a destination. You can change the compass

settings manually (Compass Settings, page 46). To open the

compass settings quickly, you can press START from the

compass widget.

Setting the Compass Heading

From the compass widget, press START.

Select Lock Heading.

Point the top of the watch toward your heading, and press

START.

When you deviate from the heading, the compass displays

the direction from the heading and degree of deviation.

Altimeter and Barometer

The device contains an internal altimeter and barometer. The

device collects elevation and pressure data continuously, even

in low-power mode. The altimeter displays your approximate

elevation based on pressure changes. The barometer displays

environmental pressure data based on the fixed elevation where

the altimeter was most recently calibrated (Altimeter Settings,

page 46). You can press START from the altimeter or

barometer widgets to open the altimeter or barometer settings

quickly.

Navigation 39

History

History includes time, distance, calories, average pace or speed,

lap data, and optional sensor information.

NOTE: When the device memory is full, your oldest data is

overwritten.

Using History

History contains previous activities you have saved on your

device.

The device has a history widget for quick access to your activity

data (Widgets, page 44).

From the watch face, hold MENU.

Select History > Activities.

Select an activity.

Select an option:

• To view additional information about the activity, select All

Stats.

• To view the impact of the activity on your aerobic and

anaerobic fitness, select Training Effect (About Training

Effect, page 27).

• To view your time in each heart rate zone, select Heart

Rate (Viewing Your Time in Each Heart Rate Zone,

page 40).

• To select a lap and view additional information about each

lap, select Laps.

• To select an exercise set and view additional information

about each set, select Sets.

• To view the activity on a map, select Map.

• To view an elevation plot for the activity, select Elevation

Plot.

• To delete the selected activity, select Delete.

Multisport History

Your device stores the overall multisport summary of the activity,

including overall distance, time, calories, and optional accessory

data. Your device also separates the activity data for each sport

segment and transition so you can compare similar training

activities and track how quickly you move through the

transitions. Transition history includes distance, time, average

speed, and calories.

Viewing Your Time in Each Heart Rate Zone

Viewing your time in each heart rate zone can help you adjust

your training intensity.

From the watch face, hold MENU.

Select History > Activities.

Select an activity.

Select Heart Rate.

Viewing Data Totals

You can view the accumulated distance and time data saved to

your device.

From the watch face, hold MENU.

Select History > Totals.

If necessary, select an activity.

Select an option to view weekly or monthly totals.

Using the Odometer

The odometer automatically records the total distance traveled,

elevation gained, and time in activities.

From the watch face, hold MENU.

Select History > Totals > Odometer.

Press UP or DOWN to view odometer totals.

Deleting History

From the watch face, hold MENU.

Select History > Options.

Select an option:

• Select Delete All Activities to delete all activities from the

history.

• Select Reset Totals to reset all distance and time totals.

NOTE: This does not delete any saved activities.

Customizing Your Device

Activities and App Settings

These settings allow you to customize each preloaded activity

app based on your needs. For example, you can customize data

pages and enable alerts and training features. Not all settings

are available for all activity types.

Hold MENU, select Activities & Apps, select an activity, and

select the activity settings.

3D Distance: Calculates your distance traveled using your

elevation change and your horizontal movement over ground.

3D Speed: Calculates your speed using your elevation change

and your horizontal movement over ground (3D Speed and

Distance, page 43).

Accent Color: Sets the accent color of each activity to help

identify which activity is active.

Add Activity: Allows you to customize a multisport activity.

Alerts: Sets the training or navigation alerts for the activity.

Auto Climb: Enables the device to detect elevation changes

automatically using the built-in altimeter.

Auto Lap: Sets the options for the Auto Lap

feature (Auto Lap,

page 42).

Auto Pause: Sets the device to stop recording data when you

stop moving or when you drop below a specified speed

(Enabling Auto Pause, page 42).

Auto Rest: Enables the device to automatically detect when you

are resting during a pool swim and create a rest interval

(Auto Rest, page 16).

Auto Run: Enables the device to detect ski runs automatically

using the built-in accelerometer.

Auto Scroll: Enables you to move through all of the activity data

screens automatically while the timer is running (Using Auto

Scroll, page 43).

Auto Set: Enables the device to start and stop exercise sets

automatically during a strength training activity.

Background Color: Sets the background color of each activity

to black or white.

Big Numbers: Changes the size of the numbers on the golf hole

information screen.

ClimbPro: Displays ascent planning and monitoring screens

while navigating.

Club Prompt: Displays a prompt that enables you to enter

which club you used after each detected shot while playing

golf.

Countdown Start: Enables a countdown timer for pool

swimming intervals.

Data Screens: Enables you to customize data screens and add

new data screens for the activity (Customizing the Data

Screens, page 41).

Driver Distance: Sets the average distance the ball travels on

your drive while playing golf.

40 History

Edit Weight: Allows you to add the weight used for an exercise

set during a strength training or cardio activity.

Golf Distance: Set the unit of measure used while playing golf.

GPS: Sets the mode for the GPS antenna (Changing the GPS

Setting, page 43).

Handicap Scoring: Enables handicap scoring while playing

golf. The Local Handicap option allows you to enter the

number of strokes to be subtracted from your total score. The

Index/Slope option allows you to enter your handicap and the

course slope rating so the device can calculate your course

handicap. When you enable either handicap scoring option,

you can adjust your handicap value.

Lap Key: Enables you to record a lap or a rest during the

activity.

Lock Keys: Locks the keys during multisport activities to

prevent accidental key presses.

Map: Sets the display preferences for the map data screen for

the activity (Activity Map Settings, page 42).

Metronome: Plays tones at a steady rhythm to help you

improve your performance by training at a faster, slower, or

more consistent cadence (Using the Metronome, page 14).

PlaysLike: Enables the "plays like" distance feature while

playing golf, which accounts for elevation changes on the

course by showing the adjusted distance to the green

(Viewing PlaysLike Distance, page 18).

Pool Size: Sets the pool length for pool swimming.

Power Mode: Sets the default power mode for the activity.

Power Save Timeout: Sets the power-save timeout options for

the activity (Power Save Timeout Settings, page 43).

Recording Interval: Sets the frequency for recording track

points during an expedition (Changing the Track Point

Recording Interval, page 18).

Record After Sunset: Sets the device to record track points

after sunset during an expedition.

Rename: Sets the activity name.

Repeat: Enables the Repeat option for multisport activities. For

example, you can use this option for activities that include

multiple transitions, such as a swimrun.

Restore Defaults: Allows you to reset the activity settings.

Routing: Sets the preferences for calculating routes for the

activity (Routing Settings, page 42).

Scoring: Enables or disables scorekeeping automatically when

you start a round of golf. The Always Ask option prompts you

when you begin a round.

Scoring Method: Sets the scoring method to stroke play or

Stableford scoring while playing golf.

Segment Alerts: Enables prompts that alert you to approaching

segments.

Stat Tracking: Enables statistics tracking while playing golf.

Stroke Detect.: Enables stroke detection for pool swimming.

Tournament Mode: Disables features that are not allowed

during sanctioned tournaments.

Transitions: Enables transitions for multisport activities.

Vibration Alerts: Enables alerts that notify you to inhale or

exhale during a breathwork activity.

Workout Videos: Enables instructive workout animations for a

strength, cardio, yoga, or Pilates activity. Animations are

available for pre-installed workouts and workouts

downloaded from Garmin Connect.

Customizing the Data Screens

You can show, hide, and change the layout and content of data

screens for each activity.

Hold MENU.

Select Activities & Apps.

Select the activity to customize.

Select the activity settings.

Select Data Screens.

Select a data screen to customize.

Select an option:

• Select Layout to adjust the number of data fields on the

data screen.

• Select a field to change the data that appears in the field.

• Select Left Gauge or Right Gauge to add graphical dive

gauges.

• Select Reorder to change the location of the data screen

in the loop.

• Select Remove to remove the data screen from the loop.

NOTE: Not all options are available for dive activities.

If necessary, select Add New to add a data screen to the

loop.

You can add a custom data screen, or select one of the

predefined data screens.

Adding a Map to an Activity

You can add the map to the data screens loop for an activity.

Hold MENU.

Select Activities & Apps.

Select the activity to customize.

Select the activity settings.

Select Data Screens > Add New > Map.

Alerts

You can set alerts for each activity, which can help you to train

toward specific goals, to increase your awareness of your

environment, and to navigate to your destination. Some alerts

are available only for specific activities. There are three types of

alerts: event alerts, range alerts, and recurring alerts.

Event alert: An event alert notifies you once. The event is a

specific value. For example, you can set the device to alert

you when you reach a specified elevation.

Range alert: A range alert notifies you each time the device is

above or below a specified range of values. For example, you

can set the device to alert you when your heart rate is below

60 beats per minute (bpm) and over 210 bpm.

Recurring alert: A recurring alert notifies you each time the

device records a specified value or interval. For example, you

can set the device to alert you every 30 minutes.

Alert Name Alert Type Description

Cadence Range You can set minimum and maximum

cadence values.

Calories Event,

recurring

You can set the number of calories.

Custom Event,

recurring

You can select an existing message or

create a custom message and select an

alert type.

Distance Recurring You can set a distance interval.

Elevation Range You can set minimum and maximum

elevation values.

Heart Rate Range You can set minimum and maximum heart

rate values or select zone changes. See

About Heart Rate Zones, page 31 and

Heart Rate Zone Calculations, page 32.

Pace Range You can set minimum and maximum pace

values.

Power Range You can set the high or low power level.

Proximity Event You can set a radius from a saved

location.

Customizing Your Device 41

Alert Name Alert Type Description

Run/Walk Recurring You can set timed walking breaks at

regular intervals.

Speed Range You can set minimum and maximum

speed values.

Stroke Rate Range You can set high or low strokes per

minute.

Time Event,

recurring

You can set a time interval.

Setting an Alert

Hold MENU.

Select Activities & Apps.

Select an activity.

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Alerts.

Select an option:

• Select Add New to add a new alert for the activity.

• Select the alert name to edit an existing alert.

If necessary, select the type of alert.

Select a zone, enter the minimum and maximum values, or

enter a custom value for the alert.

If necessary, turn on the alert.

For event and recurring alerts, a message appears each time

you reach the alert value. For range alerts, a message appears

each time you exceed or drop below the specified range

(minimum and maximum values).

Activity Map Settings

You can customize the appearance of the map data screen for

each activity.

Hold MENU, select Activities & Apps, select an activity, select

the activity settings, and select Map.

Configure Maps: Shows or hides data from installed map

products.

Map Theme: Sets the map to display data optimized for your

activity type. The System option uses the preferences from

the system map settings (Map Themes, page 47).

Use Sys. Settings: Enables the device to use the preferences

from the system map settings.

Orientation: Sets the orientation of the map. The North Up

option shows north at the top of the screen. The Track Up

option shows your current direction of travel at the top of the

screen.

User Locations: Shows or hides saved locations on the map.

Auto Zoom: Automatically selects the zoom level for optimal

use of your map. When disabled, you must zoom in or out

manually.

Lock on Road: Locks the position icon, which represents your

position on the map, onto the nearest road.

Track Log: Shows or hides the track log, or the path you have

traveled, as a colored line on the map.

Track Color: Changes the track log color.

Detail: Sets the amount of detail shown on the map. Showing

more detail may cause the map to redraw more slowly.

Marine: Sets the map to display data in marine mode (Marine

Map Settings, page 47).

Draw Segments: Shows or hides segments, as a colored line

on the map.

Draw Contours: Shows or hides contour lines on the map.

Routing Settings

You can change the routing settings to customize the way the

device calculates routes for each activity.

Hold MENU, select Activities & Apps, select an activity, select

the activity settings, and select Routing.

Activity: Sets an activity for routing. The device calculates

routes optimized for the type of activity you are doing.

Popularity Routing: Calculates routes based on the most

popular runs and rides from Garmin Connect.

Courses: Sets how you navigate courses using the device. Use

the Follow Course option to navigate a course exactly as it

appears, without recalculating. Use the Use Map option to

navigate a course using routable maps, and recalculate the

route if you stray from the course.

Calculation Method: Sets the calculation method to minimize

the time, distance, or ascent in routes.

Avoidances: Sets the road or transportation types to avoid in

routes.

Type: Sets the behavior of the pointer that appears during direct

routing.

Auto Lap

Marking Laps by Distance

You can use Auto Lap to mark a lap at a specific distance

automatically. This feature is helpful for comparing your

performance over different parts of an activity (for example,

every 1 mile or 5 kilometers).

Hold MENU.

Select Activities & Apps.

Select an activity.

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Auto Lap.

Select an option:

• Select Auto Lap to turn Auto Lap on or off.

• Select Auto Distance to adjust the distance between

laps.

Each time you complete a lap, a message appears that displays

the time for that lap. The device also beeps or vibrates if audible

tones are turned on (System Settings, page 48).

Customizing the Lap Alert Message

You can customize one or two data fields that appear in the lap

alert message.

Hold MENU.

Select Activities & Apps.

Select an activity.

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Auto Lap > Lap Alert.

Select a data field to change it.

Select Preview (optional).

Enabling Auto Pause

You can use the Auto Pause feature to pause the timer

automatically when you stop moving. This feature is helpful if

your activity includes stop lights or other places where you must

stop.

NOTE: History is not recorded while the timer is stopped or

paused.

Hold MENU.

Select Activities & Apps.

Select an activity.

42 Customizing Your Device

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Auto Pause.

Select an option:

• To pause the timer automatically when you stop moving,

select When Stopped.

• To pause the timer automatically when your pace or

speed drops below a specified level, select Custom.

Enabling Auto Climb

You can use the auto climb feature to detect elevation changes

automatically. You can use it during activities such as climbing,

hiking, running, or biking.

Hold MENU.

Select Activities & Apps.

Select an activity.

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Auto Climb > Status.

Select Always or When Not Navigating.

Select an option:

• Select Run Screen to identify which data screen appears

while running.

• Select Climb Screen to identify which data screen

appears while climbing.

• Select Invert Colors to reverse the display colors when

changing modes.

• Select Vertical Speed to set the rate of ascent over time.

• Select Mode Switch to set how quickly the device

changes modes.

NOTE: The Current Screen option allows you to

automatically switch to the last screen you were viewing

before the auto climb transition occurred.

3D Speed and Distance

You can set 3D speed and distance to calculate your speed or

distance using both your elevation change and your horizontal

movement over ground. You can use it during activities such as

skiing, climbing, navigating, hiking, running, or biking.

Turning On and Off the Lap Key

You can turn on the Lap Key setting to record a lap or a rest

during an activity using LAP. You can turn off the Lap Key

setting to avoid recording laps due to accidental key presses

during an activity.

Hold MENU.

Select Activities & Apps.

Select an activity.

Select the activity settings.

Select Lap Key.

The lap key status changes to On or Off based on the current

setting.

Using Auto Scroll

You can use the auto scroll feature to cycle through all of the

activity data screens automatically while the timer is running.

Hold MENU.

Select Activities & Apps.

Select an activity.

NOTE: This feature is not available for all activities.

Select the activity settings.

Select Auto Scroll.

Select a display speed.

Changing the GPS Setting

For more information about GPS, go to www.garmin.com

/aboutGPS.

Hold MENU.

Select Activities & Apps.

Select the activity to customize.

Select the activity settings.

Select GPS.

Select an option:

• Select Off to disable GPS for the activity.

• Select GPS Only to enable the GPS satellite system.

• Select GPS + GLONASS (Russian satellite system) for

more accurate position information in situations with poor

sky visibility.

• Select GPS + GALILEO (European Union satellite

system) for more accurate position information in

situations with poor sky visibility.

• Select UltraTrac to record track points and sensor data

less frequently (UltraTrac, page 43).

NOTE: Using GPS and another satellite together can reduce

battery life more quickly than using GPS only (GPS and

Other Satellite Systems, page 43).

GPS and Other Satellite Systems

Using GPS and another satellite system together offers

increased performance in challenging environments and faster

position acquisition than using GPS only. However, using

multiple systems can reduce battery life more quickly than using

GPS only.

Your device can use these Global Navigation Satellite Systems

(GNSS).

GPS: A satellite constellation built by the United States.

GLONASS: A satellite constellation built by Russia.

GALILEO: A satellite constellation built by the European Space

Agency.

UltraTrac

The UltraTrac feature is a GPS setting that records track points

and sensor data less frequently. Enabling the UltraTrac feature

increases battery life but decreases the quality of recorded

activities. You should use the UltraTrac feature for activities that

demand longer battery life and for which frequent sensor data

updates are less important.

Power Save Timeout Settings

The timeout settings affect how long your device stays in

training mode, for example, when you are waiting for a race to

start. Hold MENU, select Activities & Apps, select an activity,

and select the activity settings. Select Power Save Timeout to

adjust the timeout settings for the activity.

Normal: Sets the device to enter low-power watch mode after 5

minutes of inactivity.

Extended: Sets the device to enter low-power watch mode after

25 minutes of inactivity. The extended mode can result in

shorter battery life between charges.

Changing the Order of an Activity in the

Apps List

Hold MENU.

Select Activities & Apps.

Select an activity.

Select Reorder.

Press UP or DOWN to adjust the position of the activity in the

apps list.

Customizing Your Device 43

Widgets

Your device comes preloaded with widgets that provide at-a-

glance information. Some widgets require a Bluetooth

connection to a compatible smartphone.

Some widgets are not visible by default. You can add them to

the widget loop manually (Customizing the Widget Loop,

page 44).

ABC: Displays combined altimeter, barometer, and compass

information.

Alternate time zones: Displays the current time of day in

additional time zones.

Body Battery: With all day wear, displays your current Body

Battery level and a graph of your level for the last several

hours.

Calendar: Displays upcoming meetings from your smartphone

calendar.

Calories: Displays your calorie information for the current day.

Dive Log: Displays a brief summary of your last recorded dive.

Dog tracking: Displays your dog's location information when

you have a compatible dog tracking device paired with your

Descent device.

Floors climbed: Tracks your floors climbed and progress

toward your goal.

Garmin coach: Displays scheduled workouts when you select a

Garmin coach training plan in your Garmin Connect account.

Golf: Displays golf scores and statistics for your last round.

Health stats: Displays a dynamic summary of your current

health statistics. The measurements includes heart rate,

Body Battery level, stress, and more.

Heart rate: Displays your current heart rate in beats per minute

(bpm) and a graph of your average resting heart rate (RHR).

History: Displays your activity history and a graph of your

recorded activities.

Intensity minutes: Tracks your time spent participating in

moderate to vigorous activities, your weekly intensity minutes

goal, and progress toward your goal.

inReach

controls: Allows you to send messages on your

paired inReach device.

Last activity: Displays a brief summary of your last recorded

activity, such as your last run, last ride, or last swim.

Last sport: Displays a brief summary of your last recorded

sport.

Music controls: Provides music player controls for your

smartphone or on-device music.

My day: Displays a dynamic summary of your activity today. The

metrics include timed activities, intensity minutes, floors

climbed, steps, calories burned, and more.

Notifications: Alerts you to incoming calls, texts, social network

updates, and more, based on your smartphone notification

settings.

Performance: Displays performance measurements that help

you track and understand your training activities and race

performances.

Pulse oximeter: Allows you to take a manual pulse oximeter

reading.

Respiration: Your current respiration rate in breaths per minute

and seven-day average. You can do a breathing activity to

help you relax.

Sensor information: Displays information from an internal

sensor or a connected wireless sensor.

Steps: Tracks your daily step count, step goal, and data for

previous days.

Stress: Displays your current stress level and a graph of your

stress level. You can do a breathing activity to help you relax.

Sunrise and sunset: Displays sunrise, sunset, and civil twilight

times.

Surface Interval: Displays your surface interval time, tissue

load, and central nervous system (CNS) oxygen toxicity

percentage after a dive.

Training status: Displays your current training status and

training load, which shows you how your training affects your

fitness level and performance.

VIRB controls: Provides camera controls when you have a

VIRB device paired with your Descent device.

Weather: Displays the current temperature and weather

forecast.

Xero

device: Displays laser location information when you

have a compatible Xero device paired with your Descent

device.

Customizing the Widget Loop

You can change the order of widgets in the widget loop, remove

widgets, and add new widgets.

Hold MENU.

Select Widgets.

Select Widget Glances to turn widget glances on or off.

NOTE: Widget glances display summary data for multiple

widgets on a single screen.

Select Edit.

Select a widget.

Select an option:

• Press UP or DOWN to change the location of the widget in

the widget loop.

• Select to remove the widget from the widget loop.

Select Add.

Select a widget.

The widget is added to the widget loop.

inReach Remote

The inReach remote function allows you to control your inReach

device using your Descent device. Go to buy.garmin.com to

purchase a compatible inReach device.

Using the inReach Remote

Before you can use the inReach remote function, you must add

the inReach widget to the widget loop (Customizing the Widget

Loop, page 44).

Turn on the inReach device.

On your Descent watch, press UP or DOWN from the watch

face to view the inReach widget.

Press START to search for your inReach device.

Press START to pair your inReach device.

Press START, and select an option:

• To send an SOS message, select Initiate SOS.

NOTE: You should only use the SOS function in a real

emergency situation.

• To send a text message, select Messages > New

Message, select the message contacts, and enter the

message text or select a quick text option.

• To send a preset message, select Send Preset, and

select a message from the list.

• To view the timer and distance traveled during an activity,

select Tracking.

44 Customizing Your Device

VIRB Remote

The VIRB remote function allows you to control your VIRB

action camera using your device. Go to www.garmin.com/VIRB

to purchase a VIRB action camera.

Controlling a VIRB Action Camera

Before you can use the VIRB remote function, you must enable

the remote setting on your VIRB camera. See the VIRB Series

Owner's Manual for more information.

Turn on your VIRB camera.

Pair your VIRB camera with your Descent watch (Pairing

Your Wireless Sensors, page 49).

The VIRB widget is automatically added to the widget loop.

Press UP or DOWN from the watch face to view the VIRB

widget.

If necessary, wait while your watch connects to your camera.

Select an option:

• To record video, select Start Recording.

The video counter appears on the Descent screen.

• To take a photo while recording video, press DOWN.

• To stop recording video, press STOP.

• To take a photo, select Take Photo.

• To take multiple photos in burst mode, select Take Burst.

• To send the camera to sleep mode, select Sleep Camera.

• To wake the camera from sleep mode, select Wake

Camera.

• To change video and photo settings, select Settings.

Controlling a VIRB Action Camera During an Activity

Before you can use the VIRB remote function, you must enable

the remote setting on your VIRB camera. See the VIRB Series

Owner's Manual for more information.

Turn on your VIRB camera.

Pair your VIRB camera with your Descent watch (Pairing

Your Wireless Sensors, page 49).

When the camera is paired, a VIRB data screen is

automatically added to activities.

NOTE: The VIRB data screen is not available for dive

activities.

During an activity, press UP or DOWN to view the VIRB data

screen.

If necessary, wait while your watch connects to your camera.

Hold MENU.

Select VIRB.

Select an option:

• To control the camera using the activity timer, select

Settings > Recording Mode > Timer Start/Stop.

NOTE: Video recording automatically starts and stops

when you start and stop an activity.

• To control the camera using the menu options, select

Settings > Recording Mode > Manual.

• To manually record video, select Start Recording.

The video counter appears on the Descent screen.

• To take a photo while recording video, press DOWN.

• To manually stop recording video, press STOP.

• To take multiple photos in burst mode, select Take Burst.

• To send the camera to sleep mode, select Sleep Camera.

• To wake the camera from sleep mode, select Wake

Camera.

Using the Stress Level Widget

The stress level widget displays your current stress level and a

graph of your stress level for the last several hours. It can also

guide you through a breathing activity to help you relax.

While you are sitting or inactive, press UP or DOWN from the

watch face to view the stress level widget.

Press START to begin measuring.

TIP: If you are too active for the watch to determine your

stress level, a message appears instead of a stress level

number. You can check your stress level again after several

minutes of inactivity.

Press DOWN to view a graph of your stress level for the last

four hours.

Blue bars indicate periods of rest. Yellow bars indicate

periods of stress. Gray bars indicate times when you were

too active to determine your stress level.

To start a breathing activity, press DOWN > START, and

enter a duration for the breathing activity in minutes.

Customizing the My Day Widget

You can customize the list of metrics displayed on the My Day

widget.

From the watch face, press UP or DOWN to view the My Day

widget.

Hold MENU.

Select Options.

Select the toggle switches to show or hide each metric.

Customizing the Controls Menu

You can add, remove, and change the order of the shortcut

menu options in the controls menu (Viewing the Controls Menu,

page 1).

Hold MENU.

Select Controls.

Select a shortcut to customize.

Select an option:

• Select Reorder to change the location of the shortcut in

the controls menu.

• Select Remove to remove the shortcut from the controls

menu.

If necessary, select Add New to add an additional shortcut to

the controls menu.

Watch Face Settings

You can customize the appearance of the watch face by

selecting the layout, colors, and additional data. You can also

download custom watch faces from the Connect IQ store.

Customizing the Watch Face

Before you can activate a Connect IQ watch face, you must

install a watch face from the Connect IQ store (Connect IQ

Features, page 21).

You can customize the watch face information and appearance,

or activate an installed Connect IQ watch face.

From the watch face, hold MENU.

Select Watch Face.

Press UP or DOWN to preview the watch face options.

Select Add New to scroll through additional pre-loaded watch

faces.

Select START > Apply to activate a pre-loaded watch face or

an installed Connect IQ watch face.

If using a pre-loaded watch face, select START >

Customize.

Customizing Your Device 45

Select an option:

• To change the style of the numbers for the analog watch

face, select Dial.

• To change the sport for the gauges on the performance

watch face, select Select Sport.

• To change the style of the hands for the analog watch

face, select Hands.

• To change the style of the numbers for the digital watch

face, select Layout.

• To change the style of the seconds for the digital watch

face, select Seconds.

• To change the data that appears on the watch face, select

Data.

• To add or change an accent color for the watch face,

select Accent Color.

• To change the background color, select Bkgd. Color.

• To save the changes, select Done.

Sensors Settings

Compass Settings

Hold MENU, and select Sensors & Accessories > Compass.

Calibrate: Allows you to manually calibrate the compass sensor

(Calibrating the Compass Manually, page 46).

Display: Sets the directional heading on the compass to letters,

degrees, or milliradians.

North Ref.: Sets the north reference of the compass (Setting the

North Reference, page 46).

Mode: Sets the compass to use electronic-sensor data only

(On), a combination of GPS and electronic-sensor data when

moving (Auto), or GPS data only (Off).

Calibrating the Compass Manually

NOTICE

Calibrate the electronic compass outdoors. To improve heading

accuracy, do not stand near objects that influence magnetic

fields, such as vehicles, buildings, and overhead power lines.

Your device was already calibrated at the factory, and the

device uses automatic calibration by default. If you experience

irregular compass behavior, for example, after moving long

distances or after extreme temperature changes, you can

manually calibrate the compass.

Hold MENU.

Select Sensors & Accessories > Compass > Calibrate >

Start.

Follow the on-screen instructions.

TIP: Move your wrist in a small figure eight motion until a

message appears.

Setting the North Reference

You can set the directional reference used in calculating

heading information.

Hold MENU.

Select Sensors & Accessories > Compass > North Ref..

Select an option:

• To set geographic north as the heading reference, select

True.

• To set the magnetic declination for your location

automatically, select Magnetic.

• To set grid north (000º) as the heading reference, select

Grid.

• To set the magnetic variation value manually, select User,

enter the magnetic variance, and select Done.

Altimeter Settings

Hold MENU, and select Sensors & Accessories > Altimeter.

Calibrate: Allows you to manually calibrate the altimeter sensor.

Auto Cal.: Allows the altimeter to self-calibrate each time you

turn on GPS tracking.

Elevation: Sets the units of measure for elevation.

Calibrating the Barometric Altimeter

Your device was already calibrated at the factory, and the

device uses automatic calibration at your GPS starting point by

default. You can manually calibrate the barometric altimeter if

you know the correct elevation.

Hold MENU.

Select Sensors & Accessories > Altimeter.

Select an option:

• To calibrate automatically from your GPS starting point,

select Auto Cal., and select an option.

• To enter the current elevation manually, select Calibrate >

Yes.

• To enter the current elevation from the digital elevation

model, select Calibrate > Use DEM.

• To enter the current elevation from your GPS starting

point, select Calibrate > Use GPS.

Barometer Settings

Hold MENU, and select Sensors & Accessories > Barometer.

Calibrate: Allows you to manually calibrate the barometer

sensor.

Plot: Sets the time scale for the chart in the barometer widget.

Storm Alert: Sets the rate of barometric pressure change that

triggers a storm alert.

Watch Mode: Sets the sensor used in watch mode. The Auto

option uses both the altimeter and barometer according to

your movement. You can use the Altimeter option when your

activity involves changes in altitude, or the Barometer option

when your activity does not involve changes in altitude.

Pressure: Sets how the device displays pressure data.

Calibrating the Barometer

Your device was already calibrated at the factory, and the

device uses automatic calibration at your GPS starting point by

default. You can manually calibrate the barometer if you know

the correct elevation or the correct sea level pressure.

Hold MENU.

Select Sensors & Accessories > Barometer > Calibrate.

Select an option:

• To enter the current elevation or sea level pressure, select

Yes.

• To calibrate automatically from the digital elevation model,

select Use DEM.

• To calibrate automatically from your GPS starting point,

select Use GPS.

Xero Laser Location Settings

Before you can customize laser location settings, you must pair

a compatible Xero device (Pairing Your Wireless Sensors,

page 49).

Hold MENU, and select Sensors & Accessories > XERO

Laser Locations > Laser Locations.

During Activity: Enables the display of laser location

information from a compatible, paired Xero device during an

activity.

Share Mode: Allows you to share laser location information

publicly or broadcast it privately.

46 Customizing Your Device

Map Settings

You can customize how the map appears in the map app and

data screens.

Hold MENU, and select Map.

Map Theme: Sets the map to display data optimized for your

activity type (Map Themes, page 47).

Orientation: Sets the orientation of the map. The North Up

option shows north at the top of the screen. The Track Up

option shows your current direction of travel at the top of the

screen.

User Locations: Shows or hides saved locations on the map.

Auto Zoom: Automatically selects the zoom level for optimal

use of your map. When disabled, you must zoom in or out

manually.

Lock on Road: Locks the position icon, which represents your

position on the map, onto the nearest road.

Track Log: Shows or hides the track log, or the path you have

traveled, as a colored line on the map.

Track Color: Changes the track log color.

Detail: Sets the amount of detail shown on the map. Showing

more detail may cause the map to redraw more slowly.

Marine: Sets the map to display data in marine mode (Marine

Map Settings, page 47).

Draw Segments: Shows or hides segments, as a colored line

on the map.

Draw Contours: Shows or hides contour lines on the map.

Map Themes

You can change the map theme to display data optimized for

your activity type.

Hold MENU, and select Map > Map Theme.

None: Uses the preferences from the system map settings, with

no additional theme applied.

Marine: Sets the map to display data in marine mode.

High Contrast: Sets the map to display data with higher

contrast, for better visibility in challenging environments.

Dark: Sets the map to display data with a dark background, for

better visibility at night.

Popularity: Highlights the most popular roads or trails on the

map.

Resort Ski: Sets the map to display the most relevant ski data

at a glance.

Restore Theme: Allows you to restore map themes that have

been deleted from the device.

Marine Map Settings

You can customize how the map appears in marine mode.

Hold MENU, and select Map > Marine.

Spot Soundings: Enables depth measurements on the chart.

Light Sectors: Shows and configures the appearance of light

sectors on the chart.

Symbol Set: Sets the chart symbols in marine mode. The

NOAA option displays the National Oceanic and Atmospheric

Administration chart symbols. The International option

displays the International Association of Lighthouse

Authorities chart symbols.

Showing and Hiding Map Data

If you have multiple maps installed on your device, you can

choose the map data to show on the map.

From the watch face, press START.

Select Map.

Hold MENU.

Select the map settings.

Select Map > Configure Maps.

Select a map to activate the toggle switch, which shows or

hides the map data.

Navigation Settings

You can customize the map features and appearance when

navigating to a destination.

Customizing Map Features

Hold MENU.

Select Navigation > Data Screens.

Select an option:

• Select Map to turn on or off the map.

• Select Guide to turn on or off the guide screen that

displays the compass bearing or course to follow while

navigating.

• Select Elevation Plot to turn on or off the elevation plot.

• Select a screen to add, remove, or customize.

Setting Up a Heading Bug

You can set up a heading indicator to display on your data

pages while navigating. The indicator points to your target

heading.

Hold MENU.

Select Navigation > Heading Bug.

Setting Navigation Alerts

You can set alerts to help you navigate to your destination.

Hold MENU.

Select Navigation > Alerts.

Select an option:

• To set an alert for a specified distance from your final

destination, select Final Distance.

• To set an alert for the estimated time remaining until you

reach your final destination, select Final ETE.

• To set an alert when you stray from the course, select Off

Course.

• To enable turn-by-turn navigation prompts, select Turn

Prompts.

If necessary, select Status to turn on the alert.

If necessary, enter a distance or time value, and select .

Power Manager Settings

Hold MENU, and select Power Manager.

Battery Saver: Allows you to customize system settings to

extend battery life in watch mode (Customizing the Battery

Saver Feature, page 47).

Power Modes: Allows you to customize system settings, activity

settings, and GPS settings to extend battery life during an

activity (Customizing Power Modes, page 48).

Battery Percentage: Displays remaining battery life as a

percentage.

Battery Estimates: Displays remaining battery life as an

estimated number of days or hours.

Customizing the Battery Saver Feature

The battery saver feature allows you to quickly adjust system

settings to extend battery life in watch mode.

You can turn on the battery saver feature from the controls

menu (Viewing the Controls Menu, page 1).

Hold MENU.

Select Power Manager > Battery Saver.

Customizing Your Device 47

Select Status to turn on the battery saver feature.

Select Edit, and select an option:

• Select Watch Face to enable a low-power watch face that

updates once per minute.

• Select Music to disable listening to music from your

watch.

• Select Phone to disconnect your paired phone.

• Select Wi-Fi to disconnect from a Wi‑Fi network.

• Select Activity Tracking to turn off all-day activity

tracking, including steps, floors climbed, intensity minutes,

sleep tracking, and Move IQ events.

• Select Wrist Heart Rate to turn off the wrist heart rate

monitor.

• Select Backlight to disable the automatic backlight.

The watch displays the hours of battery life gained with each

setting change.

Select During Sleep to enable the battery saver feature

during your normal sleep hours.

TIP: You can set your normal sleep hours in the user settings

on your Garmin Connect account.

Select Low Battery Alert to receive an alert when the battery

is low.

Customizing Power Modes

Your device comes preloaded with several power modes,

allowing you to quickly adjust system settings, activity settings,

and GPS settings to extend battery life during an activity. You

can customize existing power modes and create new custom

power modes.

Hold MENU.

Select Power Manager > Power Modes.

Select an option:

• Select a power mode to customize.

• Select Add New to create a custom power mode.

If necessary, enter a custom name.

Select an option to customize specific power mode settings.

For example, you can change the GPS setting or disconnect

your paired phone.

The watch displays the hours of battery life gained with each

setting change.

If necessary, select Done to save and use the custom power

mode.

Restoring a Power Mode

You can reset a preloaded power mode to the factory default

settings.

Hold MENU.

Select Power Manager > Power Modes.

Select a preloaded power mode.

Select Restore > Yes.

System Settings

Hold MENU, and select System.

Language: Sets the language displayed on the device.

Time: Adjusts the time settings (Time Settings, page 48).

Backlight: Adjusts the backlight settings (Changing the

Backlight Settings, page 49).

Sounds: Sets the device sounds, such as key tones, alerts, and

vibrations.

Do Not Disturb: Turns on or off do not disturb mode. Use the

During Sleep option to turn on do not disturb mode

automatically during your normal sleep hours. You can set

your normal sleep hours on your Garmin Connect account.

Hot Keys: Allows you to assign shortcuts to device keys

(Customizing the Hot Keys, page 49).

Auto Lock: Allows you to lock the keys automatically to prevent

accidental key presses. Use the During Activity option to lock

the keys during a timed activity. Use the Not During Activity

option to lock the keys when you are not recording a timed

activity.

Units: Sets the units of measure used on the device (Changing

the Units of Measure, page 49).

Format: Sets general format preferences, such as the pace and

speed shown during activities, the start of the week, and

geographical position format and datum options.

Data Recording: Sets how the device records activity data. The

Smart recording option (default) allows for longer activity

recordings. The Every Second recording option provides

more detailed activity recordings, but may not record entire

activities that last for longer periods of time.

USB Mode: Sets the device to use MTP (media transfer

protocol) or Garmin mode when connected to a computer.

Reset: Allows you to reset user data and settings (Resetting All

Default Settings, page 53).

Software Update: Allows you to install software updates

downloaded using Garmin Express.

About: Displays device, software, license, and regulatory

information.

Time Settings

Hold MENU, and select System > Time.

Time Format: Sets the device to show time in a 12-hour, 24-

hour, or military format.

Set Time: Sets the time zone for the device. The Auto option

sets the time zone automatically based on your GPS position.

Time: Allows you to adjust the time if it is set to the Manual

option.

Alerts: Allows you to set hourly alerts, as well as sunrise and

sunset alerts that sound a specific number of minutes or

hours before the actual sunrise or sunset occurs (Setting

Time Alerts, page 48).

Time Sync: Allows you to manually sync the time when you

change time zones, and to update for daylight saving time

(Syncing the Time, page 48).

Setting Time Alerts

Hold MENU.

Select System > Time > Alerts.

Select an option:

• To set an alert to sound a specific number of minutes or

hours before the actual sunset occurs, select Til Sunset >

Status > On, select Time, and enter the time.

• To set an alert to sound a specific number of minutes or

hours before the actual sunrise occurs, select Til Sunrise

> Status > On, select Time, and enter the time.

• To set an alert to sound every hour, select Hourly > On.

Syncing the Time

Each time you turn on the device and acquire satellites or open

the Garmin Connect app on your paired phone, the device

automatically detects your time zones and the current time of

day. You can also manually sync the time when you change

time zones, and to update for daylight saving time.

Hold MENU.

Select System > Time > Time Sync.

Wait while the device connects to your paired phone or

locates satellites (Acquiring Satellite Signals, page 53).

48 Customizing Your Device

TIP: You can press DOWN to switch the source.

Changing the Backlight Settings

Hold MENU.

Select System > Backlight.

Select an option:

• Select In-Dive.

• Select During Activity.

• Select Not During Activity.

Select an option:

• Select Mode to turn on the backlight at depth or

throughout your dive.

• Select Keys to turn on the backlight for key presses.

• Select Alerts to turn on the backlight for alerts.

• Select Gesture to turn on the backlight by raising and

turning your arm to look at your wrist.

• Select Timeout to set the length of time before the

backlight turns off.

• Select Brightness to set the brightness level of the

backlight.

Customizing the Hot Keys

You can customize the hold function of individual keys and

combinations of keys.

Hold MENU.

Select System > Hot Keys.

Select a key or combination of keys to customize.

Select a function.

Changing the Units of Measure

You can customize units of measure for distance, pace and

speed, elevation, weight, height, and temperature.

Hold MENU.

Select System > Units.

Select a measurement type.

Select a unit of measure.

Viewing Device Information

You can view device information, such as the unit ID, software

version, regulatory information, and license agreement.

Hold MENU.

Select System > About.

Viewing E-label Regulatory and Compliance

Information

The label for this device is provided electronically. The e-label

may provide regulatory information, such as identification

numbers provided by the FCC or regional compliance markings,

as well as applicable product and licensing information.

Hold MENU.

From the system menu, select About.

Wireless Sensors

Your device can be used with wireless ANT+ or Bluetooth

sensors. For more information about compatibility and

purchasing optional sensors, go to buy.garmin.com.

Pairing Your Wireless Sensors

The first time you connect a wireless sensor to your device

using ANT+ or Bluetooth technology, you must pair the device

and sensor. After they are paired, the device connects to the

sensor automatically when you start an activity and the sensor is

active and within range.

If you are pairing a heart rate monitor, put on the heart rate

monitor.

The heart rate monitor does not send or receive data until

you put it on.

Bring the device within 3 m (10 ft.) of the sensor.

NOTE: Stay 10 m (33 ft.) away from other wireless sensors

while pairing.

Hold MENU.

Select Sensors & Accessories > Add New.

Select an option:

• Select Search All Sensors.

• Select your sensor type.

After the sensor is paired with your device, the sensor status

changes from Searching to Connected. Sensor data appears

in the data screen loop or a custom data field.

Extended Display Mode

You can use Extended Display mode to display data screens

from your Descent device on a compatible Edge device during a

ride or triathlon. See your Edge owner's manual for more

information.

Using an Optional Bike Speed or Cadence

Sensor

You can use a compatible bike speed or cadence sensor to

send data to your device.

• Pair the sensor with your device (Pairing Your Wireless

Sensors, page 49).

• Set your wheel size (Wheel Size and Circumference,

page 59).

• Go for a ride (Starting an Activity, page 12).

Training with Power Meters

• Go to www.garmin.com/intosports for a list of ANT+ sensors

that are compatible with your device (such as Vector

™

• For more information, see the owner's manual for your power

meter.

• Adjust your power zones to match your goals and abilities

(Setting Your Power Zones, page 32).

• Use range alerts to be notified when you reach a specified

power zone (Setting an Alert, page 42).

• Customize the power data fields (Customizing the Data

Screens, page 41).

Using Electronic Shifters

Before you can use compatible electronic shifters, such as

Shimano

Di2

™

shifters, you must pair them with your device

(Pairing Your Wireless Sensors, page 49). You can customize

the optional data fields (Customizing the Data Screens,

page 41). The Descent Mk2i device displays current adjustment

values when the sensor is in adjustment mode.

Situational Awareness

Your Descent device can be used with the Varia Vision

™

device,

Varia

™

smart bike lights, and rearview radar to improve

situational awareness. See the owner's manual for your Varia

device for more information.

NOTE: You may need to update the Descent software before

pairing Varia devices (Updating the Software Using the

Smartphone Apps, page 20).

Foot Pod

Your device is compatible with the foot pod. You can use the

foot pod to record pace and distance instead of using GPS when

Wireless Sensors 49

you are training indoors or when your GPS signal is weak. The

foot pod is on standby and ready to send data (like the heart

rate monitor).

After 30 minutes of inactivity, the foot pod powers off to

conserve the battery. When the battery is low, a message

appears on your device. Approximately five hours of battery life

remain.

Improving Foot Pod Calibration

Before you can calibrate your device, you must acquire GPS

signals and pair your device with the foot pod (Pairing Your

Wireless Sensors, page 49).

The foot pod is self-calibrating, but you can improve the

accuracy of the speed and distance data with a few outdoor runs

using GPS.

Stand outside for 5 minutes with a clear view of the sky.

Start a running activity.

Run on a track without stopping for 10 minutes.

Stop your activity, and save it.

Based on the recorded data, the foot pod calibration value

changes, if necessary. You should not need to calibrate the

foot pod again unless your running style changes.

Calibrating Your Foot Pod Manually

Before you can calibrate your device, you must pair your device

with the foot pod sensor (Pairing Your Wireless Sensors,

page 49).

Manual calibration is recommended if you know your calibration

factor. If you have calibrated a foot pod with another Garmin

product, you may know your calibration factor.

Hold MENU.

Select Sensors & Accessories.

Select your foot pod.

Select Cal. Factor > Set Value.

Adjust the calibration factor:

• Increase the calibration factor if your distance is too low.

• Decrease the calibration factor if your distance is too high.

Setting Foot Pod Speed and Distance

Before you can customize the foot pod speed and distance, you

must pair your device with the foot pod sensor (Pairing Your

Wireless Sensors, page 49).

You can set your device to calculate speed and distance using

your foot pod data instead of GPS data.

Hold MENU.

Select Sensors & Accessories.

Select your foot pod.

Select Speed or Distance.

Select an option:

• Select Indoor when you are training with GPS turned off,

usually indoors.

• Select Always to use your foot pod data regardless of the

GPS setting.

tempe

™

The tempe is an ANT+ wireless temperature sensor. You can

attach the sensor to a secure strap or loop where it is exposed

to ambient air, and therefore, provides a consistent source of

accurate temperature data. You must pair the tempe with your

device to display temperature data from the tempe.

Club Sensors

Your device is compatible with Approach

CT10 golf club

sensors. You can use paired club sensors to automatically track

your golf shots, including location, distance, and club type. See

the owner's manual for your club sensors for more information.

Device Information

Descent Mk2i Specifications

Battery type Rechargeable, built-in lithium-ion battery

Descent Mk2i battery life Up to 16 days in smartwatch mode

Water rating 10 ATM

Dive (EN 13319)

Decompression model Bühlmann ZHL-16C

Depth sensor Accurate from 0 m to 100 m (0 ft. to 328 ft.)

complying with EN 13319

Resolution (m): 0.1 m until 99.9 m, 1 m at

100 m and deeper

Resolution (ft.): 1 ft.

Inspection interval Inspect parts before each use for damage.

Replace parts as needed.

Operating and storage

temperature range

From -20º to 50ºC (from -4º to 122ºF)

Underwater operating

temperature range

From 0º to 40ºC (from 32º to 104ºF)

Charging temperature

range

From 0º to 45ºC (from 32º to 113ºF)

Wireless frequency 2.4 GHz @ 11.5 dBm nominal

Battery Information

The actual battery life depends on the features enabled on your

device, such as activity tracking, wrist-based heart rate,

smartphone notifications, GPS, internal sensors, and connected

sensors.

Mode Descent Mk2i Battery Life

Smartwatch mode with activity tracking

and 24/7 wrist-based heart rate monitoring

Up to 16 days

GPS+GLONASS mode Up to 48 hr.

GPS mode with streaming music Up to 15 hr.

Max. battery GPS mode Up to 96 hr.

Expedition GPS mode Up to 35 days

Battery saver watch mode Up to 50 days

Dive mode without a Descent T1

transmitter

Up to 80 hr.

Dive mode with a Descent T1 transmitter Up to 32 hr.

Descent T1 Specifications

Battery 3 V CR123A lithium

Battery life Up to 100 hr.

Thread type

in. (20 UNF)

Normal operating temperature From -20 to 60°C (from -4 to

140°F)

Underwater operating temperature From 0 to 40°C (from 32 to 104°F)

Storage temperature From -30 to 70°C (from -22 to

158°F)

Wireless frequency 2.4 GHz @ 0 dBm

Surface transmission range (ANT

wireless technology)

Up to 10 m (33 ft.)

Underwater transmission range

(sonar)

Up to 10 m (33 ft.)

Water rating 11 ATM

The device withstands pressure equivalent to a depth of 100 m. For more

information, go to www.garmin.com/waterrating.

Designed to comply with CSN EN 13319.

Aside from normal wear and tear, performance is not affected by aging.

The device withstands pressure equivalent to a depth of 110 m. For more

information, go to garmin.com/waterrating.

50 Device Information

Pressure rating 300 bar (4351 psi)

Inspection interval Inspect parts before each use for

damage. Replace parts as

needed.

Data Management

NOTE: The device is not compatible with Windows 95, 98, Me,

Windows NT

, and Mac

OS 10.3 and earlier.

Deleting Files

NOTICE

If you do not know the purpose of a file, do not delete it. Your

device memory contains important system files that should not

be deleted.

Open the Garmin drive or volume.

If necessary, open a folder or volume.

Select a file.

Press the Delete key on your keyboard.

NOTE: Mac operating systems provide limited support for

MTP file transfer mode. You must open the Garmin drive on

a Windows operating system. You should use the Garmin

Express application to remove music files from your device.

Device Maintenance

Device Care

NOTICE

Do not use a sharp object to clean the device.

Avoid chemical cleaners, solvents, and insect repellents that can

damage plastic components and finishes.

Thoroughly rinse the device with fresh water after exposure to

chlorine, salt water, sunscreen, cosmetics, alcohol, or other

harsh chemicals. Prolonged exposure to these substances can

damage the case.

Do not wash the device under high pressure, because jets of

water or air may cause damage to the depth sensor or

barometer.

Avoid extreme shock and harsh treatment, because it can

degrade the life of the product.

Do not store the device where prolonged exposure to extreme

temperatures can occur, because it can cause permanent

damage.

Discontinue use if the device is damaged or if it is stored at a

temperature outside the specified storage temperature range.

Cleaning the Device

NOTICE

Even small amounts of sweat or moisture can cause corrosion

of the electrical contacts when connected to a charger.

Corrosion can prevent charging and data transfer.

Wipe the device using a cloth dampened with a mild

detergent solution.

Wipe it dry.

After cleaning, allow the device to dry completely.

TIP: For more information, go to www.garmin.com/fitandcare.

Changing the QuickFit

Bands

Slide the latch on the QuickFit band, and remove the band

from the watch.

Aside from normal wear and tear, performance is not affected by aging.

Align the new band with the watch.

Press the band into place.

NOTE: Make sure the band is secure. The latch should close

over the watch pin.

Repeat steps 1 through 3 to change the other band.

Extra Long Diving Band

Your device comes with an extra long band you can wear over a

thick exposure suit.

Metal Watch Band Adjustment

If your watch includes a metal watch band, you should take your

watch to a jeweler or other professional to adjust the length of

the metal band.

Descent T1 Device Care

NOTICE

Do not grip the regulator or the transmitter to move, carry, or

adjust the air tank.

Do not remove the safety plug from the base of the transmitter.

Do not use a sharp object to clean the device.

Avoid chemical cleaners, solvents, and insect repellents that can

damage plastic components and finishes.

Thoroughly rinse the device with fresh water after exposure to

chlorine, salt water, sunscreen, cosmetics, alcohol, or other

harsh chemicals. Prolonged exposure to these substances can

damage the case.

Avoid extreme shock and harsh treatment, because it can

degrade the life of the product.

Do not store the device where prolonged exposure to extreme

temperatures can occur, because it can cause permanent

damage.

Discontinue use if the device is damaged or if it is stored at a

temperature outside the specified storage temperature range.

Discontinue use if there is water ingress into the battery

compartment. Even small amounts of water can cause corrosion

of the electrical contacts.

Cleaning the Transmitter

After each dive, rinse the transmitter with fresh water to

remove salt and debris.

If necessary, clean the transmitter with a soft cloth.

User Replaceable Batteries

WARNING

See the Important Safety and Product Information guide in the

product box for product warnings and other important

information.

Device Maintenance 51

Replacing the Descent T1 Battery

NOTICE

You should purchase a replacement battery only from a high-

quality manufacturer and a reputable vendor. Using a low quality

battery could result in poor product performance and reduced

battery life, especially at low temperatures. Do not use

rechargeable batteries. Rechargeable batteries may have a

higher voltage specification and can cause permanent damage

to the device.

To replace the battery, you need a coin or flat screwdriver, a

new 3 V CR123A lithium battery, and waterproof silicone

grease. You may also need a replacement battery cap

accessory.

The transmitter is powered by a 3 V CR123A lithium battery. A

battery is pre-installed at the factory. You must carefully follow

the battery replacement instructions to preserve the transmitter's

waterproofing.

Insert a coin or flat screwdriver into the slot , and rotate

counter-clockwise to unscrew the battery cap.

Remove the battery cap and battery.

Insert the new battery in the transmitter, with the positive pole

facing into the transmitter and the negative pole facing the

battery door.

Inspect both gaskets to verify they are clean, undamaged,

and fully seated in the grooves.

If the gaskets appear worn or damaged, you can purchase a

replacement battery cap kit, including a cap, pre-installed

gaskets, and silicone grease. Go to the Descent T1 product

page on garmin.com to purchase accessories.

Apply a thin layer of waterproof silicone grease to both

gaskets.

Replace the battery cap into the transmitter, and fully tighten

it.

Troubleshooting

My device is in the wrong language

You can change the device language selection if you have

accidently selected the wrong language on the device.

Hold MENU.

Scroll down to the last item in the list, and press START.

Press START.

Select your language.

Is my smartphone compatible with my

device?

The Descent Mk2i device is compatible with smartphones using

Bluetooth technology.

Go to www.garmin.com/ble for compatibility information.

My phone will not connect to the device

If your phone will not connect to the device, you can try these

tips.

• Turn off your smartphone and your device, and turn them

back on again.

• Enable Bluetooth technology on your smartphone.

• Update the Garmin Connect app to the latest version.

• Remove your device from the Garmin Connect app and the

Bluetooth settings on your smartphone to retry the pairing

process.

• If you bought a new smartphone, remove your device from

the Garmin Connect app on the smartphone you intend to

stop using.

• Bring your smartphone within 10 m (33 ft.) of the device.

• On your smartphone, open the Garmin Connect app, select

or , and select Garmin Devices > Add Device to enter

pairing mode.

• From the watch face, hold MENU, and select Phone > Pair

Phone.

Can I use my Bluetooth sensor with my

watch?

The device is compatible with some Bluetooth sensors. The first

time you connect a sensor to your Garmin device, you must pair

the device and sensor. After they are paired, the device

connects to the sensor automatically when you start an activity

and the sensor is active and within range.

Hold MENU.

Select Sensors & Accessories > Add New.

Select an option:

• Select Search All Sensors.

• Select your sensor type.

You can customize the optional data fields (Customizing the

Data Screens, page 41).

My headphones will not connect to the

device

If your headphones were previously connected to your

smartphone using Bluetooth technology, they may connect to

your smartphone before connecting to your device. You can try

these tips.

• Turn off Bluetooth technology on your smartphone.

Refer to the owner's manual for your smartphone for more

information.

• Stay 10 m (33 ft.) away from your smartphone while

connecting headphones to your device.

• Pair your headphones with your device (Connecting

Bluetooth Headphones, page 23).

My music cuts out or my headphones do not

stay connected

When using a Descent Mk2i device connected to headphones

using Bluetooth technology, the signal is strongest when there is

a direct line of sight between the device and the antenna on the

headphones.

• If the signal passes through your body, you may experience

signal loss or your headphones may become disconnected.

• It is recommended to wear your headphones with the

antenna on the same side of your body as your Descent Mk2i

device.

• Since headphones vary by model, you can try moving the

watch to your other wrist.

Restarting Your Device

Hold LIGHT until the device turns off.

Hold LIGHT to turn on the device.

52 Troubleshooting

Resetting All Default Settings

You can reset all of the device settings to the factory default

values.

Hold MENU.

Select System > Reset.

Select an option:

• To reset all of the device settings to the factory default

values and save all user-entered information and activity

history, select Reset Default Settings.

• To delete all activities from the history, select Delete All

Activities.

• To reset all distance and time totals, select Reset Totals.

• To reset all of the device settings to the factory default

values and delete all user-entered information and activity

history, select Delete Data and Reset Settings.

NOTE: If you have set up a Garmin Pay wallet, this option

deletes the wallet from your device. If you have music

stored on your device, this option deletes your stored

music.

Diving

Resetting Your Tissue Load

You can reset your current tissue load saved on the device. You

should reset your tissue load only if you do not plan to use the

device again in the future. This can be useful for dive shops that

provide devices for rent.

Hold MENU.

Select System > Reset > Reset Tissues.

Resetting the Surface Pressure

The device automatically determines the surface pressure using

the barometric altimeter. Large pressure changes, such as

during a flight, can cause the device to automatically start a dive

activity. You can reset the surface pressure if the device

automatically starts a dive activity incorrectly.

Hold LIGHT until the device turns off.

Hold LIGHT to turn on the device.

When the Descent logo appears, hold MENU until you are

prompted to reset the surface pressure.

Select Yes.

Updating the Transmitter Software Using Your

Descent Dive Computer

Before you can update the software, you must pair your Descent

T1 transmitter with a Descent Mk2i dive computer.

Select an option to sync your dive computer:

• Sync your dive computer with the Garmin Dive app.

• Connect the dive computer to your computer using the

USB cable, and sync with the Garmin Express application.

Garmin Dive and Garmin Express automatically look for

software updates. When you sync with Garmin Express, the

update is applied immediately to your dive computer. When

you sync with Garmin Dive, you will be prompted to apply the

update at a later time.

Install the transmitter on the first-stage regulator (Installing

the Transmitter on Your Tank Regulator, page 5).

Gradually open the tank valve to pressurize the first-stage

regulator.

When the transmitter detects pressure, it wakes from low

power mode and plays a tone.

On the paired Descent dive computer, hold MENU, select

Dive Setup > Air Integration > Transmitters, and select

your transmitter.

Wait for the transmitter to connect to your dive computer.

Connected appears on the dive computer screen.

Select Software Update.

NOTE: This option may take up to a minute to appear while

the dive computer determines the transmitter's software

version and battery status.

Verify the transmitter ID when prompted.

The transmitter ID is printed on the housing.

Keep the dive computer near the transmitter until the

software update is complete.

My transmitter and watch lose connection underwater

If your watch and transmitter communicate on the surface but

lose communication underwater, you can try these tips.

• Increase the transmitter power setting (Adjusting the

Transmitter Power Setting, page 53).

• Install the transmitter on a high pressure hose extension to

improve the line of sight between the transmitter and the

watch (Installing the Transmitter on a High Pressure Hose

Extension, page 5).

• Follow the transmitter position tips to achieve the best line of

sight between the watch and the transmitter (Transmitter

Position Tips, page 4).

Adjusting the Transmitter Power Setting

NOTE: Increasing the power setting increases the audible noise

from the transmitter and decreases its battery life.

Hold MENU.

Select Dive Setup > Air Integration > Transmitters.

Select a paired transmitter.

Select Set Transmit Power.

Enter the transmitter ID.

NOTE: The transmitter ID is printed on the housing.

Select an option.

My transmitter battery is draining rapidly

If your transmitter battery is draining faster than the expected

battery life (Descent T1 Specifications, page 50), you should

make sure the transmitter is returning to low power mode after a

dive.

When you return to the surface after a dive, depressurize

your regulator.

The installed transmitter enters low power mode after two

minutes have elapsed.

Acquiring Satellite Signals

The device may need a clear view of the sky to acquire satellite

signals. The time and date are set automatically based on the

GPS position.

TIP: For more information about GPS, go to www.garmin.com

/aboutGPS.

Go outdoors to an open area.

The front of the device should be oriented toward the sky.

Wait while the device locates satellites.

It may take 30–60 seconds to locate satellite signals.

Improving GPS Satellite Reception

• Frequently sync the device to your Garmin Connect account:

◦ Connect your device to a computer using the USB cable

and the Garmin Express application.

◦ Sync your device to the Garmin Connect app using your

Bluetooth enabled smartphone.

◦ Connect your device to your Garmin Connect account

using a Wi‑Fi wireless network.

Troubleshooting 53

While connected to your Garmin Connect account, the device

downloads several days of satellite data, allowing it to quickly

locate satellite signals.

• Take your device outside to an open area away from tall

buildings and trees.

• Remain stationary for a few minutes.

The temperature reading is not accurate

Your body temperature affects the temperature reading for the

internal temperature sensor. To get the most accurate

temperature reading, you should remove the watch from your

wrist and wait 20 to 30 minutes.

You can also use an optional tempe external temperature

sensor to view accurate ambient temperature readings while

wearing the watch.

Maximizing the Battery Life

You can do several things to extend the life of the battery.

• Change the power mode during an activity (Changing the

Power Mode, page 13).

• Turn on the battery saver feature from the controls menu

(Viewing the Controls Menu, page 1).

• Reduce the backlight timeout (Changing the Backlight

Settings, page 49).

• Reduce the backlight brightness.

• Use UltraTrac GPS mode for your activity (UltraTrac,

page 43).

• Turn off Bluetooth technology when you are not using

connected features (Connected Features, page 18).

• When pausing your activity for a longer period of time, use

the resume later option (Stopping an Activity, page 13).

• Turn off activity tracking (Turning Off Activity Tracking,

page 33).

• Use a watch face that is not updated every second.

For example, use a watch face without a second hand

(Customizing the Watch Face, page 45).

• Limit the smartphone notifications the device displays

(Managing Notifications, page 19).

• Stop broadcasting heart rate data to paired Garmin devices

(Broadcasting Heart Rate Data to Garmin Devices, page 24).

• Turn off wrist-based heart rate monitoring (Turning Off the

Wrist-based Heart Rate Monitor, page 24).

NOTE: Wrist-based heart rate monitoring is used to calculate

vigorous intensity minutes and calories burned.

• Turn on manual pulse oximeter readings (Turning Off

Automatic Pulse Oximeter Readings, page 31).

Activity Tracking

For more information about activity tracking accuracy, go to

garmin.com/ataccuracy.

My daily step count does not appear

The daily step count is reset every night at midnight.

If dashes appear instead of your step count, allow the device

to acquire satellite signals and set the time automatically.

My step count does not seem accurate

If your step count does not seem accurate, you can try these

tips.

• Wear the device on your non-dominant wrist.

• Carry the device in your pocket when pushing a stroller or

lawn mower.

• Carry the device in your pocket when actively using your

hands or arms only.

NOTE: The device may interpret some repetitive motions,

such as washing dishes, folding laundry, or clapping your

hands, as steps.

The step counts on my device and my Garmin

Connect account don't match

The step count on your Garmin Connect account updates when

you sync your device.

Select an option:

• Sync your step count with the Garmin Connect application

(Using Garmin Connect on Your Computer, page 20).

• Sync your step count with the Garmin Connect app

(Manually Syncing Data with Garmin Connect, page 20).

Wait while the device syncs your data.

Syncing can take several minutes.

NOTE: Refreshing the Garmin Connect app or the Garmin

Connect application does not sync your data or update your

step count.

The floors climbed amount does not seem accurate

Your device uses an internal barometer to measure elevation

changes as you climb floors. A floor climbed is equal to 3 m

(10 ft.).

• Avoid holding handrails or skipping steps while climbing

stairs.

• In windy environments, cover the device with your sleeve or

jacket as strong gusts can cause erratic readings.

Getting More Information

You can find more information about this product on the Garmin

website.

• Go to support.garmin.com for additional manuals, articles,

and software updates.

• Go to buy.garmin.com, or contact your Garmin dealer for

information about optional accessories and replacement

parts.

• Go to www.garmin.com/ataccuracy for information about

feature accuracy.

This is not a medical device.

Appendix

Data Fields

NOTE: Some data fields require ANT+ or Bluetooth accessories

to display data.

% Functional Threshold Power: The current power output as a

percentage of functional threshold power.

% Heart Rate Reserve: The percentage of heart rate reserve

(maximum heart rate minus resting heart rate).

10s Balance: The 10-second moving average of the left/right

power balance.

10s Power: The 10-second moving average of power output.

24-Hour Maximum: The maximum temperature recorded in the

last 24 hours from a compatible temperature sensor.

24-Hour Minimum: The minimum temperature recorded in the

last 24 hours from a compatible temperature sensor.

30s Balance: The 30-second moving average of the left/right

power balance.

30s Power: The 30-second moving average of power output.

3s Balance: The three-second moving average of the left/right

power balance.

3s Power: The 3-second moving average of power output.

500m Pace: The current rowing pace per 500 meters.

54 Appendix

Aerobic Training Effect: The impact of the current activity on

your aerobic fitness level.

Ambient Pressure: The uncalibrated environmental pressure.

Anaerobic Training Effect: The impact of the current activity on

your anaerobic fitness level.

Average % Heart Rate Reserve: The average percentage of

heart rate reserve (maximum heart rate minus resting heart

rate) for the current activity.

Average 500m Pace: The average rowing pace per 500 meters

for the current activity.

Average Ascent: The average vertical distance of ascent since

the last reset.

Average Balance: The average left/right power balance for the

current activity.

Average Cadence: Cycling. The average cadence for the

current activity.

Average Cadence: Running. The average cadence for the

current activity.

Average Descent: The average vertical distance of descent

since the last reset.

Average Distance Per Stroke: Swimming. The average

distance traveled per stroke during the current activity.

Average Distance Per Stroke: Paddle sports. The average

distance traveled per stroke during the current activity.

Average GCT Balance: The average ground contact time

balance for the current session.

Average Ground Contact Time: The average amount of

ground contact time for the current activity.

Average Heart Rate: The average heart rate for the current

activity.

Average Heart Rate %Max.: The average percentage of

maximum heart rate for the current activity.

Average Lap Time: The average lap time for the current

activity.

Average Left Power Phase: The average power phase angle

for the left leg for the current activity.

Average Moving Speed: The average speed when moving for

the current activity.

Average Nautical Speed: The average speed in knots for the

current activity.

Average Overall Speed: The average speed for the current

activity, including both moving and stopped speeds.

Average Pace: The average pace for the current activity.

Average Power: The average power output for the current

activity.

Average Right Power Phase: The average power phase angle

for the right leg for the current activity.

Average Speed: The average speed for the current activity.

Average Stride Length: The average stride length for the

current session.

Average Stroke Rate: Paddle sports. The average number of

strokes per minute (spm) during the current activity.

Average Strokes Per Length: The average number of strokes

per pool length during the current activity.

Average Swolf: The average swolf score for the current activity.

Your swolf score is the sum of the time for one length plus

the number of strokes for that length (Swim Terminology,

page 15). In open water swimming, 25 meters is used to

calculate your swolf score.

Average Vertical Oscillation: The average amount of vertical

oscillation for the current activity.

Average Vertical Ratio: The average ratio of vertical oscillation

to stride length for the current session.

Avg. Left Peak Power Phase: The average power phase peak

angle for the left leg for the current activity.

Avg. Nautical SOG: The average speed of travel in knots for

the current activity, regardless of the course steered and

temporary variations in heading.

Avg. Platform Center Offset: The average platform center

offset for the current activity.

Avg. Right Peak Power Phase: The average power phase

peak angle for the right leg for the current activity.

Avg. SOG: The average speed of travel for the current activity,

regardless of the course steered and temporary variations in

heading.

Balance: The current left/right power balance.

Barometric Pressure: The current calibrated environmental

pressure.

Battery Level: The remaining battery power.

Bearing: The direction from your current location to a

destination. You must be navigating for this data to appear.

Cadence: Cycling. The number of revolutions of the crank arm.

Your device must be connected to a cadence accessory for

this data to appear.

Cadence: Running. The steps per minute (right and left).

Cadence Gauge: Running. A color gauge showing your current

cadence range.

Calories: The amount of total calories burned.

CNS: Your current central nervous system oxygen toxicity

percentage.

COG: The actual direction of travel, regardless of the course

steered and temporary variations in heading.

Compass Gauge: The direction you are moving based on the

compass.

Compass Heading: The direction you are moving based on the

compass.

Course: The direction from your starting location to a

destination. Course can be viewed as a planned or set route.

You must be navigating for this data to appear.

Destination Location: The position of your final destination.

Destination Waypoint: The last point on the route to the

destination. You must be navigating for this data to appear.

Di2 Battery: The remaining battery power of a Di2 sensor.

Distance: The distance traveled for the current track or activity.

Distance Per Stroke: Paddle sports. The distance traveled per

stroke.

Distance Remaining: The remaining distance to the final

destination. You must be navigating for this data to appear.

Distance To Next: The remaining distance to the next waypoint

on the route. You must be navigating for this data to appear.

Elapsed Time: The total time recorded. For example, if you start

the timer and run for 10 minutes, then stop the timer for 5

minutes, then start the timer and run for 20 minutes, your

elapsed time is 35 minutes.

Elevation: The altitude of your current location above or below

sea level.

Estimated Total Distance: The estimated distance from the

start to the final destination. You must be navigating for this

data to appear.

ETA: The estimated time of day when you will reach the final

destination (adjusted to the local time of the destination). You

must be navigating for this data to appear.

ETA at Next: The estimated time of day when you will reach the

next waypoint on the route (adjusted to the local time of the

waypoint). You must be navigating for this data to appear.

Appendix 55

ETE: The estimated time remaining until you reach the final

destination. You must be navigating for this data to appear.

Floors Climbed: The total number of floors climbed up for the

day.

Floors Descended: The total number of floors climbed down for

the day.

Floors per Minute: The number of floors climbed up per minute.

Front: The front bike gear from a gear position sensor.

GCT Balance: The left/right balance of ground contact time

while running.

GCT Balance Gauge: A color gauge showing the left/right

balance of ground contact time while running.

Gear Battery: The battery status of a gear position sensor.

Gear Combo: The current gear combination from a gear

position sensor.

Gear Ratio: The number of teeth on the front and rear bike

gears, as detected by a gear position sensor.

Gears: The front and rear bike gears from a gear position

sensor.

Glide Ratio: The ratio of horizontal distance traveled to the

change in vertical distance.

Glide Ratio to Destination: The glide ratio required to descend

from your current position to the destination elevation. You

must be navigating for this data to appear.

GPS: The strength of the GPS satellite signal.

GPS Elevation: The altitude of your current location using GPS.

GPS Heading: The direction you are moving based on GPS.

Grade: The calculation of rise (elevation) over run (distance).

For example, if for every 3 m (10 ft.) you climb you travel

60 m (200 ft.), the grade is 5%.

Ground Contact Time: The amount of time in each step that

you spend on the ground while running, measured in

milliseconds. Ground contact time is not calculated while

walking.

Ground Contact Time Gauge: A color gauge showing the

amount of time in each step that you spend on the ground

while running, measured in milliseconds.

Heading: The direction you are moving.

Heart Rate: Your heart rate in beats per minute (bpm). Your

device must have wrist-based heart rate or be connected to a

compatible heart rate monitor.

Heart Rate %Max.: The percentage of maximum heart rate.

Heart Rate Gauge: A color gauge showing your current heart

rate zone.

Heart Rate Zone: The current range of your heart rate (1 to 5).

The default zones are based on your user profile and

maximum heart rate (220 minus your age).

Intensity Factor: The Intensity Factor

™

for the current activity.

Interval Average %HRR: The average percentage of heart rate

reserve (maximum heart rate minus resting heart rate) for the

current swim interval.

Interval Average %Max.: The average percentage of maximum

heart rate for the current swim interval.

Interval Average Heart Rate: The average heart rate for the

current swim interval.

Interval Distance: The distance traveled for the current interval.

Interval Lengths: The number of pool lengths completed during

the current interval.

Interval Maximum %HRR: The maximum percentage of heart

rate reserve (maximum heart rate minus resting heart rate)

for the current swim interval.

Interval Maximum %Max.: The maximum percentage of

maximum heart rate for the current swim interval.

Interval Maximum Heart Rate: The maximum heart rate for the

current swim interval.

Interval Pace: The average pace for the current interval.

Interval Stroke Rate: The average number of strokes per

minute (spm) during the current interval.

Interval Strokes Per Length: The average number of strokes

per pool length during the current interval.

Interval Stroke Type: The current stroke type for the interval.

Interval Swolf: The average swolf score for the current interval.

Interval Time: The stopwatch time for the current interval.

Lap % Heart Rate Reserve: The average percentage of heart

rate reserve (maximum heart rate minus resting heart rate)

for the current lap.

Lap 500m Pace: The average rowing pace per 500 meters for

the current lap.

Lap Ascent: The vertical distance of ascent for the current lap.

Lap Balance: The average left/right power balance for the

current lap.

Lap Cadence: Cycling. The average cadence for the current

lap.

Lap Cadence: Running. The average cadence for the current

lap.

Lap Descent: The vertical distance of descent for the current

lap.

Lap Distance: The distance traveled for the current lap.

Lap Distance Per Stroke: Swimming. The average distance

traveled per stroke during the current lap.

Lap Distance Per Stroke: Paddle sports. The average distance

traveled per stroke during the current lap.

Lap GCT Balance: The average ground contact time balance

for the current lap.

Lap Ground Contact Time: The average amount of ground

contact time for the current lap.

Lap Heart Rate: The average heart rate for the current lap.

Lap Heart Rate %Max.: The average percentage of maximum

heart rate for the current lap.

Lap Left Peak Power Phase: The average power phase peak

angle for the left leg for the current lap.

Lap Left Power Phase: The average power phase angle for the

left leg for the current lap.

Lap Normalized Power: The average Normalized Power for the

current lap.

Lap Pace: The average pace for the current lap.

Lap Platform Center Offset: The average platform center offset

for the current lap.

Lap Power: The average power output for the current lap.

Lap Right Peak Power Phase: The average power phase peak

angle for the right leg for the current lap.

Lap Right Power Phase: The average power phase angle for

the right leg for the current lap.

Laps: The number of laps completed for the current activity.

Lap SOG: The average speed of travel for the current lap,

regardless of the course steered and temporary variations in

heading.

Lap Speed: The average speed for the current lap.

Lap Stride Length: The average stride length for the current

lap.

Lap Stroke Rate: Swimming. The average number of strokes

per minute (spm) during the current lap.

56 Appendix

Lap Stroke Rate: Paddle sports. The average number of

strokes per minute (spm) during the current lap.

Lap Strokes: Swimming. The total number of strokes for the

current lap.

Lap Strokes: Paddle sports. The total number of strokes for the

current lap.

Lap Swolf: The swolf score for the current lap.

Lap Time: The stopwatch time for the current lap.

Lap Vertical Oscillation: The average amount of vertical

oscillation for the current lap.

Lap Vertical Ratio: The average ratio of vertical oscillation to

stride length for the current lap.

Last Lap %HRR: The average percentage of heart rate reserve

(maximum heart rate minus resting heart rate) for the last

completed lap.

Last Lap 500m Pace: The average rowing pace per 500 meters

for the last lap.

Last Lap Ascent: The vertical distance of ascent for the last

completed lap.

Last Lap Cadence: Cycling. The average cadence for the last

completed lap.

Last Lap Cadence: Running. The average cadence for the last

completed lap.

Last Lap Descent: The vertical distance of descent for the last

completed lap.

Last Lap Distance: The distance traveled for the last completed

lap.

Last Lap Distance Per Stroke: Swimming. The average

distance traveled per stroke during the last completed lap.

Last Lap Distance Per Stroke: Paddle sports. The average

distance traveled per stroke during the last completed lap.

Last Lap Heart Rate: The average heart rate for the last

completed lap.

Last Lap Heart Rate %Max.: The average percentage of

maximum heart rate for the last completed lap.

Last Lap Normalized Power: The average Normalized Power

for the last completed lap.

Last Lap Pace: The average pace for the last completed lap.

Last Lap Power: The average power output for the last

completed lap.

Last Lap SOG: The average speed of travel for the last

completed lap, regardless of the course steered and

temporary variations in heading.

Last Lap Speed: The average speed for the last completed lap.

Last Lap Stroke Rate: Swimming. The average number of

strokes per minute (spm) during the last completed lap.

Last Lap Stroke Rate: Paddle sports. The average number of

strokes per minute (spm) during the last completed lap.

Last Lap Strokes: Swimming. The total number of strokes for

the last completed lap.

Last Lap Strokes: Paddle sports. The total number of strokes

for the last completed lap.

Last Lap Swolf: The swolf score for the last completed lap.

Last Lap Time: The stopwatch time for the last completed lap.

Last Length Pace: The average pace for your last completed

pool length.

Last Length Stroke Rate: The average number strokes per

minute (spm) during the last completed pool length.

Last Length Strokes: The total number of strokes for the last

completed pool length.

Last Length Stroke Type: The stroke type used during the last

completed pool length.

Last Length Swolf: The swolf score for the last completed pool

length.

Lat/Lon: The current position in latitude and longitude

regardless of the selected position format setting.

Left Peak Power Phase: The current power phase peak angle

for the left leg. Power phase peak is the angle range over

which the rider produces the peak portion of the driving force.

Left Power Phase: The current power phase angle for the left

leg. Power phase is the pedal stroke region where positive

power is produced.

Lengths: The number of pool lengths completed during the

current activity.

Load: The training load for the current activity. Training load is

the amount of excess post-exercise oxygen consumption

(EPOC), which indicates the strenuousness of your workout.

Location: The current position using the selected position

format setting.

Max. Nautical SOG: The maximum speed of travel in knots for

the current activity, regardless of the course steered and

temporary variations in heading.

Maximum Ascent: The maximum rate of ascent in feet per

minute or meters per minute since the last reset.

Maximum Depth: The maximum depth descended during a

dive.

Maximum Descent: The maximum rate of descent in meters

per minute or feet per minute since the last reset.

Maximum Elevation: The highest elevation reached since the

last reset.

Maximum Lap Power: The top power output for the current lap.

Maximum Nautical Speed: The maximum speed in knots for

the current activity.

Maximum Power: The top power output for the current activity.

Maximum SOG: The maximum speed of travel for the current

activity, regardless of the course steered and temporary

variations in heading.

Maximum Speed: The top speed for the current activity.

Minimum Elevation: The lowest elevation reached since the

last reset.

Moving Time: The total time moving for the current activity.

Multisport Time: The total time for all sports in a multisport

activity, including transitions.

Muscle O2 Saturation %: The estimated muscle oxygen

saturation percentage for the current activity.

N2/He Load: Your current nitrogen and helium tissue load level.

Nautical Distance: The distance traveled in nautical meters or

nautical feet.

Nautical SOG: The actual speed of travel in knots, regardless of

the course steered and temporary variations in heading.

Nautical Speed: The current speed in knots.

Next Split Distance: Running. The total distance of the next

split.

Next Split Target Pace: Running. The target pace for the next

split.

Next Waypoint: The next point on the route. You must be

navigating for this data to appear.

Normalized Power: The Normalized Power

™

for the current

activity.

Off Course: The distance to the left or right by which you have

strayed from the original path of travel. You must be

navigating for this data to appear.

OTU: Your current oxygen toxicity units.

Appendix 57

Overall Ahead/Behind: Running. The overall time ahead or

behind of the target pace.

Pace: The current pace.

PacePro Gauge: Running. Your current split pace and your

target split pace.

Pedal Smoothness: The measurement of how evenly a rider is

applying force to the pedals throughout each pedal stroke.

Performance Condition: The performance condition score is a

real-time assessment of your ability to perform.

Platform Center Offset: The platform center offset. Platform

center offset is the location on the pedal platform where force

is applied.

Power: The current power output in watts.

Power Gauge: A color gauge showing your current power zone.

Power to Weight: The current power measured in watts per

kilogram.

Power Zone: The current range of power output (1 to 7) based

on your FTP or custom settings.

Rear: The rear bike gear from a gear position sensor.

Repeat On: The timer for the last interval plus the current rest

(pool swimming).

Reps: During a strength training activity, the number of

repetitions in a workout set.

Respiration Rate: Your respiration rate in breaths per minute

(brpm).

Rest Timer: The timer for the current rest (pool swimming).

Right Peak Power Phase: The current power phase peak angle

for the right leg. Power phase peak is the angle range over

which the rider produces the peak portion of the driving force.

Right Power Phase: The current power phase angle for the

right leg. Power phase is the pedal stroke region where

positive power is produced.

Set Timer: During a strength training activity, the amount of time

spent in the current workout set.

Speed: The current rate of travel.

Speed Over Ground: The actual speed of travel, regardless of

the course steered and temporary variations in heading.

Split Distance: Running. The total distance of the current split.

Split Distance Remaining: Running. The remaining distance of

the current split.

Split Pace: Running. The pace for the current split.

Split Target Pace: Running. The target pace for the current

split.

Stopped Time: The total time stopped for the current activity.

Stress: Your current stress level.

Stride Length: The length of your stride from one footfall to the

next, measured in meters.

Stroke Rate: Swimming. The number of strokes per minute

(spm).

Stroke Rate: Paddle sports. The number of strokes per minute

(spm).

Strokes: Swimming. The total number of strokes for the current

activity.

Strokes: Paddle sports. The total number of strokes for the

current activity.

Sunrise: The time of sunrise based on your GPS position.

Sunset: The time of sunset based on your GPS position.

Swim Time: The swimming time for the current activity, not

including rest time.

Temperature: The temperature of the air. Your body

temperature affects the temperature sensor. You can pair a

tempe sensor with your device to provide a consistent source

of accurate temperature data.

Time in Zone: The time elapsed in each heart rate or power

zone.

Time of Day: The time of day based on your current location

and time settings (format, time zone, daylight saving time).

Timer: The current time of the countdown timer.

Time Seated: The time spent seated while pedaling for the

current activity.

Time Seated Lap: The time spent seated while pedaling for the

current lap.

Time Standing: The time spent standing while pedaling for the

current activity.

Time Standing Lap: The time spent standing while pedaling for

the current lap.

Time to Next: The estimated time remaining before you reach

the next waypoint in the route. You must be navigating for

this data to appear.

Time to Surface: The amount of time required to safely ascend

to the surface.

Torque Efficiency: The measurement of how efficiently a rider

is pedaling.

Total Ascent: The total elevation distance ascended since the

last reset.

Total Ascent/Descent Gauge: The total elevation distances

ascended and descended during the activity or since the last

reset.

Total Descent: The total elevation distance descended since

the last reset.

Total Hemoglobin: The estimated total hemoglobin

concentration in the muscle.

Training Effect Gauge: The impact of the current activity on

your aerobic and anaerobic fitness levels.

Training Stress Score: The Training Stress Score

™

for the

current activity.

Velocity Made Good: The speed at which you are closing on a

destination along a route. You must be navigating for this

data to appear.

Vertical Dist. to Dest.: The elevation distance between your

current position and the final destination. You must be

navigating for this data to appear.

Vertical Oscillation: The amount of bounce while you are

running. The vertical motion of your torso, measured in

centimeters for each step.

Vertical Oscillation Gauge: A color gauge showing the amount

of bounce while you are running.

Vertical Ratio: The ratio of vertical oscillation to stride length.

Vertical Ratio Gauge: A color gauge showing the ratio of

vertical oscillation to stride length.

Vertical Speed: The rate of ascent or descent over time.

Vertical Speed to Target: The rate of ascent or descent to a

predetermined altitude. You must be navigating for this data

to appear.

Work: The accumulated work performed (power output) in

kilojoules.

VO2 Max. Standard Ratings

These tables include standardized classifications for VO2 max. estimates by age and gender.

58 Appendix

Males Percentile 20–29 30–39 40–49 50–59 60–69 70–79

Superior 95 55.4 54 52.5 48.9 45.7 42.1

Excellent 80 51.1 48.3 46.4 43.4 39.5 36.7

Good 60 45.4 44 42.4 39.2 35.5 32.3

Fair 40 41.7 40.5 38.5 35.6 32.3 29.4

Poor 0–40 <41.7 <40.5 <38.5 <35.6 <32.3 <29.4

Females Percentile 20–29 30–39 40–49 50–59 60–69 70–79

Superior 95 49.6 47.4 45.3 41.1 37.8 36.7

Excellent 80 43.9 42.4 39.7 36.7 33 30.9

Good 60 39.5 37.8 36.3 33 30 28.1

Fair 40 36.1 34.4 33 30.1 27.5 25.9

Poor 0–40 <36.1 <34.4 <33 <30.1 <27.5 <25.9

Data reprinted with permission from The Cooper Institute. For more information, go to www.CooperInstitute.org.

FTP Ratings

These tables include classifications for functional threshold

power (FTP) estimates by gender.

Males Watts per Kilogram (W/kg)

Superior 5.05 and greater

Excellent From 3.93 to 5.04

Good From 2.79 to 3.92

Fair From 2.23 to 2.78

Untrained Less than 2.23

Females Watts per Kilogram (W/kg)

Superior 4.30 and greater

Excellent From 3.33 to 4.29

Good From 2.36 to 3.32

Fair From 1.90 to 2.35

Untrained Less than 1.90

FTP ratings are based on research by Hunter Allen and Andrew

Coggan, PhD, Training and Racing with a Power Meter

(Boulder, CO: VeloPress, 2010).

Wheel Size and Circumference

Your speed sensor automatically detects your wheel size. If

necessary, you can manually enter your wheel circumference in

the speed sensor settings.

The tire size is marked on both sides of the tire. This is not a

comprehensive list. You can also measure the circumference of

your wheel or use one of the calculators available on the

internet.

Tire Size Wheel Circumference (mm)

20 × 1.75 1515

20 × 1-3/8 1615

22 × 1-3/8 1770

22 × 1-1/2 1785

24 × 1 1753

24 × 3/4 Tubular 1785

24 × 1-1/8 1795

24 × 1.75 1890

24 × 1-1/4 1905

24 × 2.00 1925

24 × 2.125 1965

26 × 7/8 1920

26 × 1-1.0 1913

26 × 1 1952

26 × 1.25 1953

Tire Size Wheel Circumference (mm)

26 × 1-1/8 1970

26 × 1.40 2005

26 × 1.50 2010

26 × 1.75 2023

26 × 1.95 2050

26 × 2.00 2055

26 × 1-3/8 2068

26 × 2.10 2068

26 × 2.125 2070

26 × 2.35 2083

26 × 1-1/2 2100

26 × 3.00 2170

27 × 1 2145

27 × 1-1/8 2155

27 × 1-1/4 2161

27 × 1-3/8 2169

29 x 2.1 2288

29 x 2.2 2298

29 x 2.3 2326

650 x 20C 1938

650 x 23C 1944

650 × 35A 2090

650 × 38B 2105

650 × 38A 2125

700 × 18C 2070

700 × 19C 2080

700 × 20C 2086

700 × 23C 2096

700 × 25C 2105

700C Tubular 2130

700 × 28C 2136

700 × 30C 2146

700 × 32C 2155

700 × 35C 2168

700 × 38C 2180

700 × 40C 2200

700 × 44C 2235

700 × 45C 2242

700 × 47C 2268

Symbol Definitions

These symbols may appear on the device or accessory labels.

Appendix 59

WEEE disposal and recycling symbol. The WEEE symbol is

attached to the product in compliance with the EU directive

2012/19/EU on Waste Electrical and Electronic Equipment (WEEE).

It is intended to deter the improper disposal of this product and to

promote reuse and recycling.

60 Appendix

Index

accessories 4, 49, 52, 54

acclimation 29

activities 12–14, 18, 40, 43

custom 13, 15

favorites 13

saving 13

starting 12

activity tracking 32, 33

airplane mode 1

alarms 36, 41

alert 15

alerts 33, 41, 42, 47, 48

heart rate 24

altimeter 39, 46

calibrating 46

altitude 29

ANT+ sensors 49, 50

applications 18–21

smartphone 2

apps 13

assistance 20, 21

auto climb 43

Auto Lap 42

Auto Pause 42

auto rest 16

auto scroll 43

backlight 49

bands 51

barometer 39, 46

calibrating 46

battery 51

charging 2

life 50

maximizing 13, 18, 19, 43, 47, 48, 54

replacing 51, 52

bike sensors 49

Bluetooth sensors 49

Bluetooth technology 15, 18–20, 52

headphones 23, 52

Body Battery 30

buttons 1

cadence 14, 24, 25

alerts 42

sensors 49

calendar 33

calibrating

altimeter 46

compass 46

calorie, alerts 42

charging 1, 2

cleaning the device 51

clock 36, 37

compass 8, 18, 39, 46, 47

calibrating 46

computer 23

Connect IQ 21, 22

connecting 19, 21

contacts, adding 20, 21

controls menu 1, 45

coordinates 37

countdown timer 36

courses 38

creating 37

editing 38

playing 16

selecting 16

customizing the device 2, 41, 45, 46, 49

data

pages 41

screens 9

sharing 49

storing 19, 20

transferring 19, 20

uploading 20

data fields 21

deleting

all user data 51

history 40

personal records 36

device care 51

distance 43

alerts 42, 47

measuring 16, 18

diving 3, 4, 7–12, 51

dogleg 17

drills 15, 16

elevation 29, 34

emergency contacts 20, 21

extended display 49

fitness 27

foot pod 49, 50

Galileo 43

Garmin Connect 18–21, 33, 34

storing data 20

Garmin Express 2, 21

updating software 2

Garmin Pay 22

GLONASS 43, 48

goals 35

GPS 43, 48

settings 43

signal 53

green view, pin location 17, 18

ground contact time 25

GroupTrack 21

handicap 17

heading setting 47

headphones 52

Bluetooth technology 23, 52

connecting 23

heart rate 16, 23, 24

alerts 24, 42

monitor 24, 26, 27, 30

pairing sensors 24

zones 26, 31, 32, 40

history 19, 40

deleting 40

sending to computer 19, 20

holes, changing 16

incident detection 20, 21

indoor training 13

inReach remote 44

installing 4, 5

intensity minutes 33

intervals 15, 16

workouts 34

jumpmaster 15

keys 48, 49

customizing 43

lactate threshold 26, 28

language 48

layup 17

lengths 15

LiveTrack 20, 21

locations 37

deleting 37

editing 37

saving 37, 39

main menu, customizing 44

man overboard (MOB) 38

map 10, 39, 42, 47

settings 47

map points. See points of interest (POI)

maps 41, 47

browsing 39

navigating 38, 39

marine 47

measurements 17

measuring a shot 17

metronome 14

MOB 38

Move IQ 33

multisport 13, 15, 40

music 22, 23

loading 23

playing 23

services 22, 23

music controls 23

navigation 18, 37, 39, 41, 47

Sight 'N Go 38

stopping 39

NFC 22

north reference 46

notifications 18, 19

phone calls 19

text messages 19

odometer 18, 40

oxygen saturation 30, 31

pace 34

pairing 6

ANT+ sensors 24

Bluetooth sensors 52

sensors 49

smartphone 1, 2, 52

payments 22

performance condition 26–28

personal records 36

deleting 36

phone calls 19

pin location, green view 18

points of interest (POI) 37, 39

power (force) 26

alerts 42

meters 27, 28, 49, 59

zones 32

profiles 12

user 31

projected finish time 27

pulse oximeter 23, 30, 31, 33

race predictor 26

racing 35

recovery 26, 28, 30

replacing the battery 52

resetting the device 48, 52, 53

routes 37

settings 42

running dynamics 24–26

safety information 21

satellite signals 43, 53

saving activities 13, 15

scorecard 17

scoring 17

screen 49

segments 35

settings 1, 2, 6, 7, 12, 16, 21, 31, 33, 40,

42–44, 46–49, 53

Index 61

sharing data 49

shortcuts 1, 45

Sight 'N Go 38

skiing

alpine 14

backcountry 14

ski touring 14

snowboarding 14

sleep mode 32

smartphone 19–22, 44, 52

applications 18, 21

pairing 1, 2, 52

snowboarding 14

software

license 49

updating 2, 20

version 49

specifications 50

speed 43

speed and cadence sensors 49

statistics 17

stopwatch 8, 36

storing data 19, 20

stress level 26, 27, 30, 45

stress score 27, 30

stride length 24, 25

strokes 15

sunrise and sunset times 48

swimming 15, 16

swing analysis 17

swolf score 15

system settings 48

target 17, 35

tempe 50, 54

temperature 29, 50, 54

text messages 19

tides 14

time 48

alerts 42

settings 48

zones and formats 48

time zones 48

timer 13, 15, 40

countdown 36

tones 14, 36

TracBack 13, 38

tracking 20, 31

tracks 37

training 18, 29, 34, 35

calendar 33

plans 33

Training Effect 26, 27

training load 28, 29

training status 26, 28, 29

treadmill 13

triathlon training 15

troubleshooting 11, 12, 24, 26, 30, 31, 52–54

UltraTrac 43

unit ID 49

units of measure 49

updates, software 20

uploading data 20

USB 20

user data, deleting 51

user profile 31

vertical oscillation 24, 25

vertical ratio 24, 25

VIRB remote 45

virtual course 13

Virtual Partner 35

VO2 max. 26–28, 58

wallet 22

watch faces 2, 21, 45

watch mode 1, 43

water resistance 51

waypoints 39

projecting 37

wheel sizes 59

Wi‑Fi 21

connecting 21

widgets 1, 21, 24, 30, 44, 45

workouts 33

loading 33

zones

heart rate 31, 32

power 32

time 48

62 Index

support.garmin.com

GUID-4A2D3019-BA14-49BD-B371-4214D187D493 v1October 2020

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Garmin Descent MK2i Manual

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