Garmin GPSMAP 278 - Manual (Page 125)

How Can Garmin Help You with DSC?
To receive distress calls or position reports, you must have a
DSC-equipped chartplotter as well as a VHF radio with DSC
support. During normal, non-emergency position report
communication, Channel 70 (156.525 MHz) has been set aside as
the VHF/DSC digital call channel.
For a distress call, press the MayDay button on the VHF radio. The
call transmits on an emergency channel with the MMSI number
attached to the call, if the receiver has DSC support. Any DSC-
equipped mariner (on sea or land) within range can receive the call.
When the GPSMAP 278 is connected to a VHF with DSC support,
the GPSMAP 278 shows a call list, log, and a directory. Basic wiring
is required for the Garmin unit and VHF radio to send and receive
NMEA data from each other.
Declaration of Conformity (DoC)
Hereby, Garmin, declares that this GPSMAP 278 is in compliance
with the essential requirements and other relevant provisions of
Directive 1999/5/EC.
To view the full Declaration of Conformity, see the Garmin Web site
for your Garmin product: www.garmin.com .
GPSMAP 278 Owner’s Manual 7
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