Digital Selective Calling
Chartplotter and NMEA 0183 VHF Radio Functionality
When your chartplotter is connected to a NMEA 0183 VHF radio, 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.
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 Nav Info > Other Vessels > 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.
1 Select Nav Info > Other Vessels > DSC List > Add Contact.
2 Enter the Maritime Mobile Service Identity (MMSI) of the vessel.
3 Enter the name of the vessel.
Incoming Distress Calls
If your compatible chartplotter and VHF radio are connected using NMEA 0183, 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.
1 Select Nav Info > Other Vessels > DSC List.
2 Select a position-report call.
3 Select Review > Navigate To.
4 Select Go To or Route To.
Position Tracking
You can connect a VHF radio to the same NMEA 2000 network as the chartplotter to send position reports and
track vessels that send position reports. The vessel must send the correct PGN data (PGN 129808; DSC Call
Information) to use this feature.
You can connect the chartplotter to a VHF radio using NMEA 0183, to send position reports and track vessels
that send position reports.
Every position report call received is logged in the DSC list (
).
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Digital Selective Calling
