Definition
A condition in which an aircraft is threatened by serious and/or imminent danger and requires immediate assistance. It is the highest level of emergency and is declared on the radio with the spoken word 'Mayday,' repeated three times.
Plain English
The aircraft is in serious trouble right now and needs help immediately. This is the most urgent kind of emergency a pilot can declare.
Context Anchor
Used in emergency procedures and radio communication when deciding whether the situation calls for an immediate emergency call and priority help from air traffic control.
Derivation
From the Old French 'destresse,' meaning 'constraint' or 'affliction,' which itself comes from the Latin 'distringere,' meaning 'to pull apart' or 'stretch.' The sense of being pulled in a dangerous direction carries through to the aviation use: the aircraft is being pulled toward a serious outcome and needs help to prevent it.
Why Pilots Care
Declaring it prompts air traffic control to give absolute priority and coordinate emergency response.
Intuition Check
Do not read distress condition as simply being worried, uncomfortable, or having a minor problem. In aviation, it means serious immediate danger that requires immediate help.
Example Sentence 1
After the engine failed over mountainous terrain, the pilot declared a distress condition by transmitting 'Mayday, Mayday, Mayday' on the active frequency.
Example Sentence 2
ATC cleared the area and dispatched rescue services upon hearing the distress condition.