Which of the following correctly describes the concept of "Minimum Equipment List" (MEL)?

The concept of "Minimum Equipment List" (MEL) is crucial in aviation operations as it establishes what equipment can be inoperative while still allowing the aircraft to remain airworthy. The MEL provides guidelines for flight crews, ensuring that even when certain equipment is not functioning, the safety and operational integrity of the flight are maintained.

The MEL is specific to each aircraft type and is based on the aircraft's design and regulatory standards. It assists flight crews in understanding which systems or components can be safely deferred for maintenance without jeopardizing the safety of the flight. This allows for effective operations while ensuring compliance with aviation regulations.

In this context, a mere checklist of needed supplies or a record of flight schedules does not adequately address the safety and operational criteria that the MEL encompasses. Similarly, a guide for pilot training requirements pertains to different aspects of aviation operations, focusing on pilot qualifications rather than equipment status. Thus, the description of the MEL as a list of equipment that can be inoperative for airworthiness accurately captures its purpose within the aviation framework.