Distress and Urgency Calls Flashcards

After sending a DSC distress alert, on which channel should you immediately follow up with a voice MAYDAY call?

Answer: Channel 16

After a DSC distress alert on Ch 70, you must immediately switch to Ch 16 and transmit a voice MAYDAY call.

What is the correct procedure if you hear a MAYDAY call but the coast guard does not appear to have received it?

Answer: Transmit a MAYDAY RELAY on behalf of the vessel in distress

If the coastguard has not acknowledged the MAYDAY, any vessel that hears it should transmit a MAYDAY RELAY to alert rescue services.

How is a MAYDAY RELAY call prefixed when transmitted by a third party?

Answer: MAYDAY RELAY spoken three times

A relay distress call is introduced with the words 'MAYDAY RELAY' repeated three times before the call.

Which authority has the right to impose silence on all stations during a distress situation?

Answer: The coastguard or rescue coordination centre

The coastguard or rescue coordination centre can impose radio silence using the signal SEELONCE MAYDAY on Ch 16.

What phrase is used to indicate that radio silence may be relaxed during a distress incident?

Answer: PRUDONCE

PRUDONCE (from French 'prudence') is broadcast to indicate that restricted working may resume but caution is still needed.

A vessel reports a crew member with a suspected broken leg. Which type of call should be made?

Answer: PAN PAN

A medical emergency that is serious but does not immediately threaten the vessel or life warrants a PAN PAN urgency call.

When cancelling a PAN PAN after the situation is resolved, which channel should the cancellation be broadcast on?

Answer: Channel 16 and any working channel used

A PAN PAN cancellation must be broadcast on Ch 16 and any other channel on which the urgency call was made.