What function does ATC play regarding filed flight plans within 30 minutes of scheduled departure?

The role of Air Traffic Control (ATC) regarding filed flight plans is crucial for maintaining safety and efficiency in the airspace. When it comes to potential discrepancies with filed flight plans, it is essential that ATC is aware, especially if there are two conflicting flight plans filed for the same flight.

If a crew has made changes to a flight plan that is either filed or amended close to the scheduled departure time, ATC must ensure that the flight crew is informed if there are two flight plans. This situation can lead to confusion or miscommunication regarding the flight’s intended route, which is why ATC proactively evaluates and confirms the current plan with the crew. Keeping both ATC and the flight crew aligned on the correct flight plan helps prevent potential security risks and operational errors.

Recognizing multiple flight plans is a critical aspect of ATC's function in coordinating air traffic and ensuring flight safety, reinforcing the need for effective communication and procedural compliance between ATC and flight crews.