What should a pilot do when they see a flashing white light signal while airborne?

When a pilot observes a flashing white light signal while airborne, it indicates that there is no applicable action required in response to that signal. The flashing white light specifically communicates a specific message that is relevant to the aircraft's current operations in the airspace. It is used primarily for informing pilots who are already in the air that they are not being directed to take any particular action or to alter their current course or altitude.

It is crucial for pilots to be familiar with the meanings behind various light signals, as these can greatly affect operations, including landing protocols and airspace management. In this case, the flashing white light does not imply any immediate action is needed, which is why understanding and recognizing this signal is essential for maintaining flight safety and compliance with air traffic protocols.