When would a controller suppress a Conflict Alert?

A controller suppresses a Conflict Alert primarily when appropriate action has been taken or will be taken to resolve a potential conflict between aircraft. This action might include issuing an instruction to either of the involved aircraft to alter their altitude, flight path, or speed, which effectively mitigates the risk of a collision. The suppression indicates that the controller is actively managing the situation and monitoring the procedures in place to ensure safe separation.

In contrast, other situations like granting clearance to a pilot or confirming that a runway is clear do not directly address the need for immediate conflict resolution. While being out of radar coverage does eliminate the need to address conflicts based on radar data, it does not represent an active conflict management scenario. Therefore, the most relevant condition for suppressing a Conflict Alert is when the controller has implemented necessary actions to maintain safety.