Define the procedure of "dispatcher release."

The dispatcher release is a crucial component in flight operations, specifically relating to the authority that allows an aircraft to depart safely. This procedure involves the Aircraft Dispatcher issuing a release that indicates the airplane is ready for flight based on various checks, including route planning, weather conditions, fuel requirements, and aircraft performance. The release not only signifies that the dispatcher has assessed all necessary data and affirmatively determines that the flight can proceed but also serves as a legal document that represents compliance with aviation regulations.

In this context, the other choices do not capture the essence of what a dispatcher release entails. A method for creating a backup flight plan is an unrelated concept, as it does not relate to the authorization for departure. The procedure for recalibrating flight instruments is focused on equipment maintenance rather than flight authorization. Similarly, a checklist for pre-flight inspections is a safety protocol but does not encompass the dispatcher’s validation and release function. Therefore, the essence of the dispatcher release lies in its direct role in granting approval for the flight, making it a foundational aspect of aviation safety and operations.