In the event of lost communication, what is the preferred route protocol?

The preferred route protocol in the event of lost communication is to follow the AVEF acronym, which stands for Assigned, Vectored, Expected, and Filed. This sequence helps pilots systematically determine the correct route to follow when they lose contact with air traffic control.

When a pilot loses communication, they should first comply with any route that was assigned to them by air traffic control. If that is not available, they would move on to the last vectored route that was given. The next step would be to follow any expected route that was provided to them and finally refer to the filed flight plan if the previous options are not applicable. This approach provides a structured method that prioritizes the most current and relevant routing information available, ensuring that the pilot remains on the safest and most efficient course possible until communication can be re-established.

Utilizing the AVEF protocol helps mitigate the risks associated with lost communication by ensuring that pilots are adhering to the most authoritative and timely guidance they have received regarding their flight path.