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 TM 11-5895-1847-12&P
OPERATOR AND UNIT MAINTENANCE
LCU 2000 GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM
OPERATION UNDER UNUSUAL CONDITIONS
INITIAL SETUP:
Personnel Required
Seaman 88K
PROCEDURE FOR RECEIVING MF/HF DSC CONTROLLER DISTRESS CALL
NOTE
These procedures only apply if there is a MF/HF DSC CONTROLLER radio installed.
International rules state that the obligation to accept distress calls and messages is
absolute in every case of every station without distinction and such messages must be
accepted with priority over all other messages. All distress messages will be answered and
the necessary steps immediately taken to give effect to them.
Coast Guard stations are much better placed to help as they have helicopters, lifeboats,
hospitals and other rescue facilities at their disposal.
Always keep a pencil and notepad by the radio in case you receive a distress alert so you
can write down the distress message.
When a DSC controller receives a distress alert it will sound an audible alarm. The alarm
will continue to sound until a response is made.
1.
Receive a distress message through the DSC controller.
a.
Make no transmissions while waiting for acknowledgement and message.
b.
Continue the watch on channel 16 until the distress alert has been acknowledged.
c.
Plot the casualties position.
d.
Write down the message transmitted on channel 16.
2.
Take the following action to acknowledge an alert from a vessel within range of the coast:
a.
Do nothing. Acknowledgements of a DSC alert by use of DSC is made only by coast stations and vessels
fitted with Class A or Class B DSC controllers. If there is no response after a short interval, contact the coast
guard and inform them of the distress situation. When the alert has been acknowledged, prepare for receiving
the subsequent distress message. Finally, inform the master of the vessel of the contents of the distress
message.
b.
If there is no response after a short interval, contact the coast guard and inform them of the distress situation.
When the alert has been acknowledged, prepare for receiving the subsequent distress message.
c.
Inform the master of the vessel of the contents of the distress message.
3.
Alert from a vessel outside coastal communication range and outside your vicinity:
a.
Wait to see if another vessel, closer to the one in distress, acknowledges the call first.
0048 00 1
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