Making Dsc Calls - Uniden UM425 Owner's Manual

Using Digital Selective Calling (DSC) Features

Making DSC Calls

There are essentially four different types of DSC voice calls:
Call type What it does
Distress Alerts all stations that you need
assistance and sends them your
current position.
Individual Calls a single station using the
User MMSI.
Group Calls all the stations that have the
same Group MMSI as yours.
All ships Calls all stations in range of your
radio.
For examples of how you might use different call types, see the diagram
below:
All ships call
Individual
When to use it
In an emergency only.
Any time you want to talk to
another station.
Any time you want to talk with
the whole group you are traveling
with at the same time.
Safety warnings (e.g., debris
in the water) or an urgency
situation.
call
E-30
All ships call
Group
call