What should you do if cleared to a fix and communications are lost?

When cleared to a fix and communications are lost, it is important to follow established protocols for IFR operations. The correct course of action is to leave the fix at the expected departure time if communications are lost. This procedure helps maintain safety and ensures compliance with operational timelines.

If you remain at the fix indefinitely without further instructions or the ability to communicate, you may impede the flow of air traffic and could also lead to complications such as the lack of available navigation information or updates. By departing the fix at the designated time, you contribute to maintaining the expected schedule, thereby reducing the potential for traffic congestion and ensuring a smoother flight continuation.

Maintaining adherence to the expected departure time provides clarity for both the pilot and air traffic control, creating a structured plan in the absence of communication. The other options, while they may sound reasonable in certain contexts, do not align with IFR protocols for handling lost communications effectively.