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3. DSC DISTRESS OPERATIONS
3-6
How to transmit a distress acknowledge call over CH16
Procedure when in area A1
When you receive a distress alert from a ship in distress, the audio alarm sounds and
the LED flashes in red. The icon for DISTRESS receiving ( ) appears in the tab area
and the pop-up message "DISTRESS ALERT message received! [CANCEL]: Stop
alarm" appears on the screen.
Press the CANCEL key to silence the audio alarm. Wait for the distress acknowledge
call from a coast station. If you do not receive the distress acknowledge call from a
coast station, which usually takes about five minutes from the time of receiving a dis-
tress alert, follow the flow charts on page 3-5.
If further DSC alerts are received from the same source and the ship in distress is be-
yond doubt in the vicinity, a DSC acknowledgement may, after consultation with a
Rescue Coordination Center (RCC) or Coast Station, be sent to terminate the distress
call.
Note 1: An asterisk (*) appearing in a distress alert message indicates an error at the
asterisk’s location.
Note 2: Do not send the distress acknowledge call in response to receipt of distress
alert having the nature of distress as "EPIRB emission".
Select VHF CH16 and transmit the distress acknowledge call to
the ship in distress.
Relay the distress alert to a coast station over DSC.
Follow the instructions of the coast station.
Transmit the distress acknowledge call
to the ship in distress over DSC CH70.
Communicate with the ship in distress.
No reply
Reply received
Begin search and rescue operation for the ship in distress.
About 20 to 30 miles
(Sea area A1)
Your ship
Coast station
Distress alert
transmission
Ship in distress