0 a special radio signal sent from a ship or an aircraft when it needs help --
1 a call for help sent from a ship or aircraft by radio, esp. in an emergency --
In aviation any air traffic controller or pilot who knows of an emergency may relay the mayday.
Water entered the engine department, and a mayday was sent at 16:30.
He issues a mayday distress signal and commands a hard left turn, but it is too late.
A mayday signal was put out by the captain but rough seas produced by the storm hampered rescue efforts.
Channel 16 is used for broadcasting distress calls such as mayday, pan-pan, securite or other urgent safety messages.
Mayday signals must only be used where there is grave and imminent danger to life.
Mayday teams with her father but does not reveal her identity to him, despite desperately wanting to, for fear it may damage the timeline.
The distress beacon was sent five minutes after the mayday call.
