What does flashing white mean to an aircraft in flight?

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Multiple Choice

What does flashing white mean to an aircraft in flight?

The concept here is that light signals differ depending on whether the aircraft is on the ground or in the air. A flashing white signal is part of the ground-signaling system and has a specific instruction for aircraft taxiing on the airport surface: return to the starting point on the airport. There isn’t any defined meaning for this signal when an aircraft is in flight. So, in flight, the signal is not applicable. In contrast, in-flight guidance comes from ATC clearances and other in-air signals, not from this ground signal.

The concept here is that light signals differ depending on whether the aircraft is on the ground or in the air. A flashing white signal is part of the ground-signaling system and has a specific instruction for aircraft taxiing on the airport surface: return to the starting point on the airport. There isn’t any defined meaning for this signal when an aircraft is in flight. So, in flight, the signal is not applicable. In contrast, in-flight guidance comes from ATC clearances and other in-air signals, not from this ground signal.

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