What should a pilot do when they see a flashing red light in flight?

When a pilot sees a flashing red light in flight, it indicates that the airport is unsafe for landing. This signal is typically used to alert pilots to hazardous conditions on the runway or within the airspace, such as an obstructed runway or significant weather issues. Pilots are trained to interpret these visual signals as a critical indication that landing is not advisable at this time.

Recognizing a flashing red light as a warning allows the pilot to take necessary evasive action, which could include circling the airport until cleared or diverting to an alternative airport. Understanding the implications of these signals is crucial for the safety of the aircraft and all on board, as well as for any personnel or operations on the ground.