Distress signal :-
The distress signal mayday indicates that a ship, aircraft or other vehicle is threatened by grave or imminent danger and require immediate assistance.
Distress alert :-
The transmission of distress alert in GMDSS indicate a ship or aircraft or any other vehicle or other person is threatened by grave and imminent and requires immediate assistance.
The Radio telephone distress procedure consist of :-
- The alarm signal (whenever possible) followed by
- The distress call
- The distress message with full implementation of GMDSS in Feb 1999.
The automatic alarm device used on 2182 Khz are no longer required.
FORMAT of RADIO Telephony distress call :-
Name (x3) / Call sign / MMSI no. of ship.
Radiotelephony distress message
Name/ Call sign/ MMSI
Nature of distress .
Type of assistance required any other information which might facilitate the rescue.
Format of NBDP distress call and message
Name/ Call Sign
Nature of distress
Type of distress/ assistance required
Additional information that may facilitate rescue.
NAME/ Call sign