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DSC
The DSC page of the Main Menu (Marine Mode only) allows you
to control and set up the Digital Selective Calling (DSC) features on
the GPSMAP 276C. Digital Selective Calling (DSC) uses marine
VHF radio and Global Positioning System (GPS) technologies to
transmit and receive location information. DSC is used by mariners
for two major operations: Distress Calls and Position Reporting.
For more information about Digital Selective Calling and Maritime
Mobile Service Identity (MMSI) numbers, refer to pages 113–114 in
the “Appendix.”
DSC Page
Understanding Distress Calls
With your GPSMAP 276C properly connected to a VHF radio with
DSC output, you may receive any DSC Distress Call within range.
An alert message appears and a tone sounds when a Distress Call is
received. The alarm only sounds on a Distress Call; Position Reports
do not sound the alarm. Distress Calls are broadcast to all DSC users
in radio range and appear with a blue and white checkered icon on
the DSC Call List and Log tabs.
You can enter a caller’s name, if it is known. The caller’s name
replaces the MMSI number as a reference once entered.
Understanding Position Reports
The Position Report operates similarly to the Distress Call. This
type of contact is like a phone call; no emergency alarms are set off.
Position Reports are not broadcast to all DSC users and appear with
a gold boat icon.
54 GPSMAP 276C Owner’s Manual
MARINE MODE PAGES AND FEATURES > DSC