FAA Ground School Practice Test

What is indicated by two quick white flashes between green flashes from a military air station?

1. Landing clearance

2. A military air station identification

3. A warning to stay clear

4. Emergency signaling

The correct answer is: A military air station identification

The indication of two quick white flashes between green flashes from a military air station is specifically used for military air station identification. This signaling is part of the visual communication protocols that aid pilots in identifying the particular type of facility they are dealing with. In the context of air traffic, the green flashes generally convey a positive signal, often associated with permission to land or proceed, while military operations utilize these unique flash patterns to convey their identification distinctly. Thus, when pilots observe two quick white flashes amidst green signals, it is a clear sign that they are in the vicinity of a military air station, helping them understand their operational context and take necessary precautions. Other interpretations, such as landing clearance, warnings to stay clear, or emergency signaling, do not align with the specific meaning attributed to that sequence of flashes. The established communication protocols for military air facilities ensure that pilots can safely navigate around these critical installations.