Safety, Fire & Survival · Distress Communications — SECURITE
The safety signal SECURITE (spoken three times) precedes a message that:
- AConcerns the safety of navigation or an important meteorological warning✓ Correct
- BAnnounces a grave and imminent danger to a vessel requiring immediate assistance
- CIndicates a very urgent message about the safety of a person with no immediate danger to life
- DIs a routine radio check between two stations
Explanation
SECURITE is the safety signal, broadcast before navigational warnings (e.g., a buoy off station, a derelict adrift) or important meteorological messages. MAYDAY is distress (grave/imminent danger) and PAN-PAN is urgency — SECURITE ranks below both.
Authority: ITU Radio Regulations; IAMSAR Manual Vol III
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