Uniden UM385 Owner's Manual page 30

If you want the radio to automatically reply to all test call, you can enable automatic test
Enabling automatic test call reply
call reply.
1. Press and hold CALL-MENU to display the normal menu.
2. Select Setup and then Test Reply. Choose Auto and press ENT-1W/25W. The radio will
automatically send an acknowledgement when it receives a test call.
CALL
3. To disable automatic test call reply, repeat the steps above and select Manual.
Requesting another station's position (POS Request)
Position Request and Reply
Anytime you need to know where another boat currently is—to find your boating partners,
to respond to a request for assistance, etc.—you can send a position request to their radio:
1. Press CALL-MENU to display the call menu.
2. Select DSC Call sub-menu, then select POS Request.
3. The radio displays the names listed in your directory; use CHANNEL UP and
CHANNEL DOWN to choose the directory entry you want to contact and press ENT-
1W/25W. If you want to contact a station that is not in your directory, select Manual.
The radio prompts you to enter the MMSI number you want to call. Enter the MMSI
number the same way you enter directory entries (see page 22). Enter all nine
digits and press ENT-1W/25W.
4. The radio displays the MMSI number you are about to contact and asks you to
confirm. If you want to request the position of the displayed MMSI number, select
Send. To cancel the request, select Cancel.
5. When the other station responds, the radio displays the MMSI number, the
longitude, and the latitude of the other station. If your radio is connected to
a chartplotter through the NMEA OUT connection (see page 43), the position
information will also be displayed on the plotter screen.
6. If the other station does not have valid GPS data, the radio displays No Position.
ENT
1W/25W
1W/25W
16
ENT
24