How to Guide

9. When you finish entering the name, the radio displays the new MMSI number and
name and asks you to confirm. To save this directory entry, select Yes; to cancel this
directory entry, select No. The radio returns to the directory list.
10. To change an existing directory entry, select the entry you want to change.
11. To delete the directory entry, select Delete. To edit the code, select Edit, then use
CHANNEL UP and CHANNEL DOWN to edit the MMSI number and the name.
12. When you are satisfied with the directory list, select Exit to close the menu screen.
MAKING DSC CALLS
There are essentially four different types of DSC voice calls:
Call
Type
What it does When to use it
Distress
Alerts all stations that you need
assistance and sends them your
current position.
In an emergency only.
Individual
Calls a single station using the
User MMSL.
Any time you want to talk to another
station.
Group
Calls all the stations that have the
same Group MMSL as yours.
Any time you want with the whole group
you are traveling with at the same time.
All Ships
Calls all stations within range of
your radio.
Safety warnings (e.g., debris in the
water) or any urgent situation.
Suppose you are coordinating safety for a sailboat race. Before the race starts, you instruct
all the racers to enter your group MMSI number into their radios. During the race:
x Throughout the race, you use group calling to update the racers on the time, race
status, and any course corrections.
x A power boat full of spectators comes a little too close to the race path. You use
individual calling to contact the power boat and advise them to stay clear of the race.
x You see a rowboat entering the area, but since it doesn’t have a radio, you can’t
communicate with the rowboat. You use all ships calling to alert all the other boats in
the area of the possible danger.
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