What action is taken if a FLAT track is out of lateral tolerances?

If a FLAT track is out of lateral tolerances, the appropriate action taken is to automatically turn to free track. This response is designed to maintain safe operations by allowing the aircraft to continue on its flight path while reducing the risk associated with being outside the established tolerances. Free track mode typically enables the aircraft to operate autonomously without relying on potentially erroneous track data, thereby ensuring that the pilot retains control over navigational decisions and can make necessary adjustments based on the current situation.

The other options relate to different scenarios that do not align with the standard procedure for handling out-of-tolerance situations. For example, issuing a warning to the pilot might not be immediate enough to ensure safety during critical phases of flight, while initiating manual control could be disruptive and unnecessary if the system can safely transition to free track. Alerting ground control is also a procedure that might follow after ensuring the aircraft is managed effectively without jeopardizing its operations in-flight.