What is the minimum fuel reserve requirement for USAF aircraft on each flight?

The minimum fuel reserve requirement for USAF aircraft emphasizes ensuring sufficient fuel remains after reaching the destination or an alternate airfield in case of unforeseen circumstances. The choice that states either 30 minutes or 20 percent between air refueling points is correct, as it establishes a safety net that accounts for variations in fuel consumption and potential changes in flight scenarios.

Choosing either 30 minutes or 20 percent allows for flexibility while still maintaining a high standard of operational safety. These parameters ensure that a minimum level of fuel is consistently retained, reducing the risk of running out of fuel during critical phases of the flight. It considers various factors, such as anticipated fuel needs based on flight conditions and the necessity for potential diversions.

This requirement ensures that pilots have enough fuel for contingencies, thereby supporting flight safety regulations and operational readiness in the USAF. The phrasing also provides clarity on adhering to the more stringent requirement for fuel reserve calculations, which is vital for effective mission planning and execution.