Definition
Radio transmissions made by a pilot to declare that the aircraft is threatened by serious and imminent danger and requires immediate assistance. A distress message is the highest level of urgency in aviation radio communication and is signaled by the spoken word 'Mayday,' repeated three times at the start of the call.
Plain English
A radio call a pilot makes to tell air traffic control or anyone listening that the aircraft is in serious trouble and needs help right now. It begins with 'Mayday, Mayday, Mayday' so everyone knows it is the most serious kind of call.
Context Anchor
Used during serious in-flight emergencies, such as an engine fire, when calling air traffic control or any station that may be able to help.
Derivation
Distress' comes from the Old French 'destresse,' meaning 'constraint, affliction, or being in difficulty.' The word 'Mayday' that begins a distress message comes from the French 'm'aidez' (help me), chosen in the 1920s because it sounded clear over noisy radios. Together the term carries its plain meaning: a message sent by someone in serious trouble asking for help.
Why Pilots Care
Distress messages receive immediate priority handling from ATC and nearby aircraft, which can be lifesaving in situations like fires.
Intuition Check
Do not read “distress” as ordinary worry or discomfort. In aviation radio use, distress means serious and immediate danger that requires immediate help.
Example Sentence 1
When the engine fire warning illuminated and flames became visible, the pilot transmitted a distress message beginning with 'Mayday, Mayday, Mayday' and requested immediate vectors to the nearest airport.
Example Sentence 2
ATC cleared the area immediately upon receiving the distress message from the aircraft.