What should you do if an aircraft reports a GPS anomaly?

When an aircraft reports a GPS anomaly, the most appropriate action is to report the anomaly to the Front Line Manager (FLM). This is essential because the FLM can take necessary steps to investigate the incident further, assess the risk involved, and communicate with other relevant parties, ensuring that all safety protocols are observed. Reporting the anomaly allows for better situational awareness and helps maintain safety in the airspace.

Addressing a GPS issue is critical because it can affect the aircraft's navigation and overall safety. By informing the FLM, it enables a coordinated response, including potentially updating other controllers or alerting additional resources that may be necessary for the management of the situation.

Other options, while they might seem feasible in isolated contexts, do not prioritize safety and communication to the extent needed in aviation operations. Ignoring the situation could lead to further complications, instructing a switch to another system without acknowledging the issue might not address the root cause, and seeking confirmation from ground control might delay the appropriate responses that the FLM can provide.