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A signal sent by radiotelephony consisting of the words "MAYDAY MAYDAY MAYDAY" means..
  • A
    the aircraft has a very urgent message to transmit concerning the safety of a ship, aircraft or vehicle.
  • B
    imminent danger threatens the aircraft and immediate assistance is required.
  • C
    the aircraft is forced to perform a fuel dumping procedure.
  • D
    the aircraft has a message to transmit concerning adverse weather conditions along its route.

A distress situation is by definition a condition of being threatened by serious and/or imminent danger and of requiring immediate assistance. A distress situation needs immediate assistance and this is the difference between distress and urgency (urgency does not require immediate assistance).

If a pilot of an aircraft encounters an emergency, this situation shall be indicated by a radio call starting with the phrase "MAYDAY" spoken three times.

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