What best describes the purpose of filed flight plans?

The purpose of filed flight plans is primarily to inform air traffic control of intended flight paths. When pilots file a flight plan, they provide important information regarding their route, altitude, and estimated times of departure and arrival. This communication is crucial for managing air traffic safely and efficiently. It allows air traffic controllers to monitor aircraft movements, provide necessary instructions, and ensure that airspace is used safely and effectively.

This system helps maintain situational awareness for both pilots and controllers, facilitating coordination during the flight. In the event of an emergency, flight plans can also assist search and rescue teams in locating an aircraft, as they provide predetermined routes and destinations. The other options presented do not capture the primary function of flight plans, as they pertain to other aspects of aviation operations that are separate from the immediate purpose of communicating intended flight paths to air traffic management.