Digital Selective Calling

Position Tracking

When you connect your Garmin chartplotter to a VHF radio using NMEA 0183, you can track vessels that send position reports. This feature is also available with NMEA 2000, provided that the vessel sends the correct PGN data (PGN 129808; DSC Call Information).

Every position report call received is logged in the DSC List (page 50).

To view a list of position reports:

1.From the Home screen, select Information > DSC List.

2.Select from the following options:

•Call with Radio—set up an individual routine call (page 52) with the radio to call the vessel that sent the position report. This option is only available if you are using a Garmin NMEA 2000-compatible VHF radio.

•Edit—edit the vessel name and add a comment. If your radio is tracking the position of the vessel, select Trail to show or hide the trail line for the vessel, and select Trail Line to change the line color.

•Clear Report—delete the call report.

•Navigate To—Go To or Route To the location sent with the position report (page 21).

•Create Waypoint—set a waypoint at the location sent with the position report.

•Next Page/Previous Page—toggle between details of the position report and a Navigation Chart marking the location.

Configuring Vessel Trails on the Navigation Chart

If you have your chartplotter configured to show trails, the Navigation Chart displays a black dot for each reported position, a black line indicating the path of the vessel, and a Blue Flag symbol indicating the last reported position.

Last-reported vessel position

Position-report location

Vessel trail

Vessel Trail

To set the duration of displayed trail points:

1.From a chart screen, select Menu > Other Vessels > DSC > DSC Trails.

2.Select the number of hours to show tracked vessels on the Navigation Chart. For example, if you select 4 Hours, all trail points (less than four hours old) for tracked vessels are displayed.

To turn trail lines off for tracked vessels:

1.From a chart screen, select Menu > Other Vessels > DSC > DSC Trails.

2.Select Off to turn trails off for every vessel.

DSC

GPSMAP® 4000/5000 Series Owner’s Manual

51