Marine radio emergency procedure
An alarm signal is used to attract the attention of operators to the incoming message. It produces a two-toned warbling sound which can be easily distinguished, even in poor reception conditions.
How to call for help
Distress messages prefixed "MAYDAY" repeated three times are used only in grave and imminent danger.
Urgency messages prefixed "PAN PAN" repeated three times are used when you or your vessel are not in grave and imminent danger.
Safety signals prefixed "SECURITE" repeated three times (pronounced SAY-CURE-E-TAY) are used when a station wants to pass important information concerning safety such as navigational warnings or weather warnings.
Distress and urgency communications can be made on the following channels:
|VHF||16 (67 alternative)|
|27MHz||88 (86 alternative)|
|HF (frequency)||4125, 6215 and 8291kHz|