Navigation and Seamanship

4.2.7.1. Reception of Safety Messages

Any message which you hear prefixed by one of the following words concerns SAFETY

MAYDAY                 Indicates that a ship, aircraft or other vehicle is threatened by grave and Imminent danger and requests immediate assistance

(Distress)                  

PAN PAN              Indicates that the calling station has a very urgent message to transmit concerning the safety of a ship, aircraft or other vehicle, or the safety of a person

(Urgency)                 

SECURITE              Indicates that the station is about to transmit a message concerning the safety of navigation or giving important meteorological warnings.

(safety)                      

If you hear any of these words, pay particular attention to the message and call the master of the officer on watch.