What procedure should be followed if an aircraft loses communication during an emergency?

In the event that an aircraft loses communication during an emergency, attempting to re-establish contact is the most appropriate procedure. This approach is crucial as it allows the pilot to seek assistance, receive updates on the situation, and clarify any instructions relevant to the emergency. The priority is to regain communication with Air Traffic Control (ATC) to ensure that the flight and its passengers remain safe.

This action is aligned with standard operating procedures that emphasize the importance of maintaining communication. Pilots are trained to utilize various communication methods, including switching frequencies or calling out on emergency frequencies, to attempt to get back in touch with ATC. Successfully re-establishing contact can provide vital information that could assist in managing the emergency more effectively.

The other options, while they might seem feasible in isolation, do not provide the immediate benefits of communication restoration. For instance, returning to base or continuing to a rendezvous point would likely depend on the communication with ATC to ensure it's the right decision. Following the last assigned clearance without communication may also lead to risky situations, as the flight may not be aware of any changes in traffic or airspace restrictions that could impact safety. Therefore, the best course of action in such emergencies is to prioritize re-establishing communication.