Furuno FM-8800D Operator's Manual page 35

Transmitting DIST ACK over CH16
Select VHF CH16 and transmit DIST ACK to vessel in distress.
Transmit DIST ACK to vessel in
distress over DSC CH70.
Relay the distress alert to a coast station over DSC.
Follow the instructions of the coast station.
Begin search and rescue operation for the vessel in distress.
Transmitting DIST ACK signal
If your vessel meets the requirements necessary to transmit the DIST ACK
signal, do the following:
When a distress alert from other ship is received, the following screen appears.
The alarm sounds and the ALARM lamp blinks.
No reply
Communicate with vessel in distress.
Distress
call received.
ID IN DIST : 123456789
NATURE : UNDESIGNATED
°
POS : 12 34'N 123
AT : 12 : 34
SIMP TP
CANCEL ALARM
2. DSC DISTRESS COMMUNICATION
Reply received
°
45'E
2-9