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Garmin Edge 830 Manual

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The compass indicates your directional heading .
2
Select to set the heading.
The compass indicates deviations from the set heading .
3
Select , 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.
Viewing Additional Gas Dive Data
During a single-gas, multi-gas, closed-circuit rebreather, or
gauge dive, scroll to the third data screen.
Your current heart rate zone (About Heart Rate Zones,
page 18).
NOTE: You can view only wrist heart rate monitor data during a
dive.
Gray: Zone 1.
Blue: Zone 2.
Green: Zone 3.
Orange: Zone 4.
Red: Zone 5.
Your central nervous system (CNS) oxygen toxicity level during
a single-gas, multi-gas, or closed-circuit rebreather dive.
Green: 0 to 79% CNS oxygen toxicity.
Yellow: 80 to 99% CNS oxygen toxicity.
Red: 100% or greater CNS oxygen toxicity.
Using the Dive Stopwatch
TIP: You can add a simplified stopwatch screen to any of the
gas dive modes (Customizing the Data Screens, page 26).
1
Start a Gauge dive.
2
Scroll to the stopwatch screen.
3
Select > Reset Avg. Depth to set the average depth to
your current depth.
4
Select > Start Stopwatch.
5
Select an option:
• To stop using the stopwatch, select > Stop Stopwatch.
• To restart the stopwatch, select > Reset Stopwatch.
Diving with the Map
You can view the map during apnea surface intervals.
1
During an apnea dive activity, scroll to the map.
2
Select , and select an option:
• To pan or zoom the map, select Pan/Zoom.
TIP: You can select to toggle between panning up and
down, panning left and right, or zooming. You can hold
to select the point indicated by the crosshairs.
• To mark your location, select Save Location.
TIP: You can select 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.
1
From the watch face, select UP.
2
Select to view tissue details and oxygen toxicity units
(OTU).
NOTE: The OTU accumulated during a dive expire after 24
hours.
Viewing the Dive Log Widget
The widget displays a brief summary of your last recorded dive.
1
From the surface interval widget, select UP.
2
Select to view more information about a dive.
3
Select a dive.
4
Select an option:
• To view additional information about the activity, select
Details.
• 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 view the depth profile of the activity, select Depth
Profile.
• To view the temperature profile of the activity, select
Temperature Profile.
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.
1
Select > Plan Dive > Compute NDL.
2
Enter an oxygen percentage.
3
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.
4 Diving
… 10 …


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