Garmin GPSMAP 278 - Manual (Page 123)

New Directory Item Page
Enter the
MMSI number,
name, and a
comment (if
needed) in the
fields.
Highlight OK
and press
ENTER to save
the directory
entry.
After creating a New Directory Item, the name created is attached
to that particular MMSI number. If you return to the Log, the new
name appears under the corresponding MMSI number.
Another way to input a name is from the Entry Review Page or the
DSC Distress Call or DSC Position Report pages. The Name and
MMSI are sent to other Garmin GPS units: Only the MMSI numbers
are sent to other non-Garmin DSC users.
Making a Distress Call
To make a Distress Call, press the MayDay (or Distress Call) button
on your VHF radio. The call transmits on an emergency channel
with the MMSI number attached to the call, if you have DSC
support. Any DSC-equipped mariner (on sea or land) within range
can receive the call.
Setting Up DSC
Use the Setup sub tab to turn DSC on and off. If you have more
than one chartplotter and only want DSC to display on another
chartplotter, turn DSC off on this unit.
This Setup sub tab also allows you to simulate Distress Calls and
Position Reports while the unit is in Simulator Mode. Simulating
calls is helpful for practice before connecting to the real system. The
Distress Call simulator also helps to check if alarms are working
properly.
DSC Setup
GPSMAP 278 Owner’s Manual 
A
PPendIx
> d
IgItAl
s
electIve
c
AllIng
(dsc)