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2. DSC DISTRESS COMMUNICATION
2-7
2.5 Receiving Distress Alert from Other Vessel,
Transmitting DIST ACK Signal
In no case is a ship permitted to transmit a DSC distress relay call upon receipt
of a DSC distress alert on VHF channel 70.
Procedure when in area A1
1. When the FM-8800D/8800S receives a distress alert from another vessel, the
ALARM LED (red) blinks and the FM-8800D/8800S sounds the distress
alarm.
2. Silence the alarm by pressing the CANCEL key.
3. Wait up to five minutes until the DIST ACK signal from a coast station is
received. Be prepared to follow the instructions of the coast station.
4. If you do not receive the DIST ACK signal, follow the flow chart shown on
page 2-8 to determine if your vessel should acknowledge a distress alert.
If further DSC alerts are received from the same source and the ship in distress
is beyond doubt in the vicinity, a DSC acknowledgement may, after consultation
with an Rescue Co-ordination Center (RCC) or Coast Station, be sent to
terminate the distress call.
Note 1: An asterisk (*) in a received distress alert message indicates error or
unknown at the location marked with the asterisk.
Note 2: Do not send DIST ACK in response to receipt of distress alert having the
nature of distress as “EPIRB emission”.
About 20 to 30 miles
(Sea area A1)
Your Ship
Coast station
Distress Alert
Transmission
Vessel in Distress
Receiving distress alert from other vessel