What action should controllers take after an aircraft has responded to an RA?

After an aircraft has responded to a Resolution Advice (RA), it is essential for air traffic controllers to provide traffic alerts and inform their supervisor. The primary goal is to ensure that all involved parties are aware of the situation and can take necessary actions to maintain safe separation between aircraft. Controllers need to monitor the airspace closely, as the RA typically indicates a potential conflict that has needed immediate pilot action to avert.

Informing the supervisor is crucial as it helps maintain oversight of traffic management and safety protocols. This step ensures that appropriate resources are available for any subsequent actions that might be necessary, such as revising traffic advisories or adjusting flight paths. Consequently, this choice is grounded in the need for continued vigilance and coordination in air traffic control to uphold safety standards after an aircraft has executed an RA maneuver.