What does a red flag typically indicate on the flight line?

A red flag on the flight line signifies an emergency situation. This visual cue indicates to personnel and pilots that there is an urgent issue that requires immediate attention and caution. In such cases, operations may need to be paused or handled with extra care due to potential hazards, whether it's an emergency landing, an aircraft in distress, or a safety risk that has been identified on the ground.

The presence of a red flag is a universally recognized signal in aviation and helps ensure that everyone on the flight line is aware of the serious nature of the situation. It is crucial for maintaining safety and effective communication among all personnel involved in flight operations. By clearly marking an emergency situation, the red flag serves as a prompt for staff to take necessary precautions and respond appropriately.