What documents are considered supplements required for flight?

The answer encompasses the requirement that all listed documents are essential supplements for flight operations. Each document serves a critical function in ensuring the aircraft's safety, compliance, and operational efficiency.

The airworthiness certificate confirms that the aircraft meets all safety standards and is authorized for operation. It is a legal document issued by the aviation authority and must be onboard during all flight operations.

The operating handbook, often referred to as the Pilot’s Operating Handbook (POH) or the flight manual, provides necessary information about the aircraft's performance, limitations, and operating procedures. It is vital for pilots to reference this handbook for specific operating conditions and safety information during a flight.

Weight and balance data is crucial in determining the overall safety and performance capability of the aircraft. Ensuring that the aircraft is loaded within its weight and balance limits is essential for controlling the aircraft's center of gravity and preventing in-flight issues.

In combination, these documents are critical in maintaining the aircraft’s airworthiness and ensuring compliance with regulations, thereby influencing the safety of the operation.