What should happen if a controller learns of a GPS anomaly?

If a controller learns of a GPS anomaly, the correct course of action is to report the anomaly to the Flight Line Manager (FLM). The reason for this is that the FLM is responsible for coordinating operational responses to safety-related issues and has the authority to assess the situation and take necessary actions to ensure safety for all aircraft operations.

Notifying the pilots directly might seem like a quick way to address the issue, but it is not the standard procedure. Controllers have protocols in place for reporting such anomalies to ensure that the right level of authority is informed for a thorough assessment and that a uniform message is communicated to all affected parties.

Continuing operations as normal in the presence of a GPS anomaly poses potential risks to safety, as the anomaly could impact navigation and situational awareness. Similarly, transferring responsibility immediately may not be appropriate without proper context or coordination, as it could create confusion and lead to a lack of clarity regarding the current situation. Thus, the most effective response is to escalate the issue through the proper channels by reporting it to the FLM.