Manual Garmin GPSMAP 7400 series (page 39 of 62) (English)

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Digital Selective Calling

Networked Chartplotter and VHF Radio

Functionality

If you have a NMEA

0183 VHF radio or a NMEA 2000 VHF

radio connected to your chartplotter, these features are enabled.

• The chartplotter can transfer your GPS position to your radio.

If your radio is capable, GPS position information is

transmitted with DSC calls.

• The chartplotter can receive digital selective calling (DSC)

distress and position information from the radio.

• The chartplotter can track the positions of vessels sending

position reports.

If you have a Garmin NMEA 2000 VHF radio connected to your

chartplotter, these features are also enabled.

• The chartplotter allows you to quickly set up and send

individual routine call details to your Garmin

VHF radio.

• When you initiate a man-overboard distress call from your

radio, the chartplotter shows the man-overboard screen and

prompts you to navigate to the man-overboard point.

• When you initiate a man-overboard distress call from your

chartplotter, the radio shows the Distress Call page to initiate

a man-overboard distress call.

Turning On DSC

Select

Settings > Other Vessels > DSC.

DSC List

The DSC list is a log of the most recent DSC calls and other

DSC contacts you have entered. The DSC list can contain up to

100 entries. The DSC list shows the most recent call from a

boat. If a second call is received from the same boat, it replaces

the first call in the call list.

Viewing the DSC List

Before you can view the DSC list, the chartplotter must be

connected to a VHF radio that supports DSC.

Select Info >

DSC List

Adding a DSC Contact

You can add a vessel to your DSC list. You can make calls to a

DSC contact from the chartplotter.

Select Info

> DSC List > Add Contact

Enter the Maritime Mobile Service Identity (MMSI) of the

vessel.

Enter the name of the vessel.

Incoming Distress Calls

If your compatible chartplotter and VHF radio are connected

using

NMEA 0183 or NMEA 2000, your chartplotter alerts you

when your VHF radio receives a DSC distress call. If position

information was sent with the distress call, that information is

also available and recorded with the call.

designates a distress call in the DSC list and marks the

position of the vessel on the Navigation chart at the time of the

DSC distress call.

Navigating to a Vessel in Distress

designates a distress call in the DSC list and marks the

position of a vessel on the Navigation chart at the time of the

DSC distress call.

Select Info > DSC List.

Select a position-report call.

Select Review > Navigate To.

Select Go To or

Route To.

Man-Overboard Distress Calls Initiated from a VHF

Radio

When the chartplotter is connected to a compatible VHF radio

with NMEA 2000, and you initiate a man-overboard DSC

distress call from the radio, the chartplotter shows the man-

overboard screen and prompts you to navigate to the man-

overboard point. If you have a compatible autopilot system

connected to the network, the chartplotter prompts you to start a

Williamson’s turn to the man-overboard point.

If you cancel the man-overboard distress call on the radio, the

chartplotter screen prompting you to activate navigation to the

man-overboard location disappears.

Man-Overboard and SOS Distress Calls Initiated from

the Chartplotter

When your chartplotter is connected to a Garmin

NMEA 2000

compatible radio and you mark an SOS or man-overboard

location, the radio shows the Distress Call page so you can

quickly initiate a distress call.

For information on placing distress calls from your radio, see the

VHF radio owner’s manual. For information about marking an

MOB or SOS location, see

Marking an SOS Location,

page

12.

Position Tracking

When you connect the chartplotter to a VHF radio using NMEA

0183, you can track vessels that send position reports.

This feature is also available with NMEA 2000, when the vessel

sends the correct PGN data (PGN 129808; DSC Call

Information).

Every position report call received is logged in the DSC list

(

DSC List

, page

31).

Viewing a Position Report

Select Info > DSC List.

Select a position-report call.

Select

Review.

Select an option:

• To switch to a Navigation chart marking the location,

select Next Page.

• To view the position report details, select Previous Page.

Navigating to a Tracked Vessel

Select Info

> DSC List

Select a position-report call.

Select Review

> Navigate To

Select

Go To or Route To.

Creating a Waypoint at the Position of a Tracked

Vessel

Select Info > DSC List.

Select a position-report call.

Select Review

> Create Waypoint

Editing Information in a Position Report

Select Info > DSC List.

Select a position-report call.

Select Review >

Edit

• To enter the name of the vessel, select Name

• To select a new symbol, select Symbol, if available.

• To enter a comment, select Comment.

• To show a trail line for the vessel if your radio is tracking

the position of the vessel, select Trail.

• To select a color for the trail line, select Trail Line.

Digital Selective Calling 31

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