What should a controller do if radar identification is questionable?

When radar identification is questionable, the most effective and immediate course of action is to take steps to re-identify the aircraft. This can involve asking the pilot to perform specific maneuvers or changes in altitude, or using other methods such as relying on secondary radar indications to confirm the identity of the aircraft. Ensuring accurate identification is critical for maintaining safety, managing air traffic effectively, and preventing potential conflicts with other aircraft.

By taking immediate action to re-establish identification, the controller effectively mitigates risks associated with misidentified targets, which can lead to dangerous situations in the airspace. Maintaining continuous and confirmed identification helps ensure that the airspace remains safe for all users.

Other options do not prioritize immediate identification, which is necessary in situations where there may be uncertainty about the target's identity. Maintaining visual flight rules or waiting for communication may not address the urgency required to clarify whether the aircraft is where it is supposed to be.