What is Mayday?
In this glossary, Mayday refers to: International radiotelephony distress signal used to indicate a grave and imminent threat requiring immediate assistance.
How is Mayday used in aviation?
In aviation communication, this term appears in contexts such as: "Mayday, Mayday, Mayday、こちらはデルタ・ワン・スリー・フォー、エンジン故障、緊急着陸のため即時ベクターを要求します。"
Why does Mayday matter in aviation?
Mayday matters because it supports clear communication in Emergencies contexts for Pilots, Air Traffic Controllers, and Cabin Crew. It also connects to aviation training and exam language such as ICAO Level 4, ICAO Level 5, ICAO Level 6, and EASA FCL.055.
Who uses Mayday?
Mayday is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.
What category does Mayday belong to?
In this glossary, Mayday is grouped under Emergencies. Related pages in this category explain adjacent procedures, commands and operational concepts.
Where does this definition come from?
This definition is sourced from ICAO Doc 9432, FAA PCG and published by Protermify Aviation as a static aviation reference page.