What must be determined regarding aircraft before any flight?

Airworthiness is a critical aspect that must be determined before any flight. This refers to the status of the aircraft regarding its readiness and safety for operation. An aircraft is considered airworthy when it conforms to its type certificate, is in condition for safe operation, and is equipped with all necessary documents and maintenance records that confirm it meets regulatory standards.

Ensuring airworthiness involves checking various components of the aircraft, such as its physical structure, systems, and equipment, to confirm that everything is functioning properly and safely. This process is essential for the safety of the crew, passengers, and those on the ground, as it reflects the overall reliability and capability of the aircraft to complete the flight successfully and without incident.

Other options, while relevant to overall flight operations or efficiency, do not take priority over ensuring an aircraft is airworthy, making airworthiness the foremost consideration prior to flight.