In what form must the flight release specify an alternate airport?

The correct response is that the flight release must specify an alternate airport by formal documentation. This requirement is in place to ensure clarity and standardization in flight operations, particularly for safety reasons. Formal documentation helps to establish a clear and traceable record of the planned route, including alternate airports that may be necessary due to unforeseen circumstances, such as inclement weather or emergency situations.

In aviation, it is critical that pilots and flight planners have access to accurate and explicit information regarding alternatives, which can only be guaranteed through documented procedures. This practice ensures that all parties involved—pilots, dispatchers, and air traffic control—are on the same page regarding the flight plan and potential alternate landing options.

Other methods such as verbal agreements, pre-flight briefings, or not specifying an alternate at all do not meet the necessary regulatory requirements and can lead to confusion or miscommunication during flight operations. The emphasis on formal documentation reinforces the importance of thorough planning and operational safety in aviation.