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Mayday is an emergency procedure word used internationally as a distress signal in voice-procedure radio communications.. It is used to signal a life-threatening emergency primarily by aviators and mariners, but in some countries local organizations such as firefighters, police forces, and transportation organizations also use the term.
A Mayday message consists of the word "mayday" spoken three times in succession, which is the distress signal, followed by the distress message, which should include: Name of the vessel or ship in distress; Its position (actual, last known, or estimated expressed in lat/long or in distance/bearing from a specific location)
Fishermen rely on mayday calls for emergency help at sea —know how to make one when needed.
The correct format for a Mayday call is as follows: [The first part of the signal is known as the "call"] Mayday, Mayday, Mayday, This is (vessel name repeated three times, followed by call sign if available) [The subsequent part of the signal is known as the "message"] Mayday (vessel name)
Radio silence can be used in nautical and aeronautical communications to allow faint distress calls to be heard (see Mayday). In the latter case, the controlling station can order other stations to stop transmitting with the proword "Seelonce Seelonce Seelonce". (The word uses an approximation of the French pronunciation of the word silence ...
Mayday: This is the most important call that can be made, due to the fact that it directly concerns a threat to life or the vessel. Some instances when this call would be made are, but not limited to death, collision, and fire at sea. When the Mayday call is made, the vessel is requiring immediate assistance. [1]: 36
The aircraft emergency frequency (also known in the USA as Guard) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress.The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD), International Aeronautical Emergency Frequency, [1] or VHF Guard, [1] and 243.0 MHz—the second harmonic of VHF guard—for military ...
As with "mayday" (from venez m'aider, "come help me"), the urgency signal pan-pan derives from French.In French, a panne is a breakdown, such as a mechanical failure. In English, it is sometimes pronounced as / p ɑː n / PAHN and sometimes as / p æ n / PAN.