Which API describes positions that are required to fly?

• A. API 6
• B. API 3
• C. API 1
• D. API 4

Answer: (A)

The idea being tested is understanding which documentation defines the crew roles that must be staffed for a flight. The API that lists positions required to fly is the one that specifies the mandatory flight crew for safe and legal operation, guiding dispatch, rostering, and readiness checks. This matters because you cannot commence a flight unless all required positions are filled for that aircraft and configuration, ensuring proper command, supervision, and workload management. For example, depending on the aircraft, the set might include Captain and First Officer as the minimum, with additional positions like a Flight Engineer or relief crew added only when the configuration requires them; the API that describes these must-fill roles covers exactly that. The other APIs describe different, non-mandatory or ancillary roles and concepts, so they don’t define the essential crew complement needed to fly.