A call of pan-pan means that there is an emergency on board a
boat,
ship,
aircraft or other
vehicle but that, for the time being at least, there is no immediate danger to anyone's life or to the vessel itself. This is distinct from a
Mayday call, which means that there is imminent danger to life or to the continued viability of the vessel itself. Thus 'pan-pan' will inform potential rescuers (including emergency services and other craft in the area) that a safety problem exists whereas 'mayday' will call upon them to drop all other activities and immediately instigate a rescue attempt.
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The international radio-telephony urgency signal. When repeated three times, indicates uncertainty or alert followed by the nature of the urgency.
(See MAYDAY.)
(Refer to AIM.)
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