[Answer] Which of these is a common alternative to the distress signal "Mayday"?

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Which of these is a common alternative to the distress signal "Mayday"?

• Pan-Pan:The radiotelephony message Pan-Pan is the international standard emergency signal that someone onboard a boat, ship or aircraft, uses to declare there is an emergency but for the time being, does not pose an immediate danger to anyone's life or to the vessel itself. This is referred to as a state of "urgency". This is distinct from a mayday call which indicates that there is imminent danger to life or the vessel itself. Radioing "pan-pan" informs potential rescuers that an urgent situation exists, whereas "mayday" commands them to immediately begin a rescue. Pan-Pan is derived from the French word "panne," which means failure or breakdown.

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