What should an aircraft do after radar contact is lost or terminated?

After radar contact is lost or terminated, the correct action for an aircraft is to resume normal non-radar compulsory position reporting. This procedure is critical because it helps maintain situational awareness and ensures that both the pilot and air traffic control are aware of the aircraft's position and intentions. When radar contact is no longer available, the aircraft must rely on traditional reporting methods, which involve reporting their position relative to known waypoints or landmarks, altitude, and any other relevant information that can assist in ensuring safe navigation.

By following non-radar reporting procedures, the pilot aids ATC in maintaining a safe and orderly flow of traffic, especially in busy airspace where radar coverage may be spotty. This process helps ATC continue to provide necessary support and traffic advisories, even in a non-radar environment.

The other responses do not adequately address the requirements or best practices for an aircraft that has lost radar contact. For instance, resuming visual flight rules may not be appropriate in all situations, especially if the aircraft is in controlled airspace or conditions require adherence to specific IFR procedures. Remaining on the current frequency could lead to misunderstandings since ATC will likely not be able to provide assistance without radar information. While requesting immediate assistance can be appropriate based on the