Which colors will not be used to mark a night PZ/LZ?

Which colors will not be used to mark a night PZ/LZ?

• A. White
• B. Green
• C. Blue
• D. White, Green, or Blue

Answer: (D)

The key idea is how color signals are chosen for marking a night PZ/LZ to be clear and unambiguous for helicopters using night vision gear. White, green, and blue are not part of the approved night marking palette, so none of these colors are used for night PZ/LZ marks. White can wash out against certain backgrounds or glare, green can be mistaken for aircraft navigation lights, and blue isn’t a standard signaling color for this purpose and can be hard to interpret in NVG conditions. By using the approved colors (the ones specifically designated for night PZ/LZ marking), you maximize contrast and avoid confusion with other signals a pilot might encounter.

The key idea is how color signals are chosen for marking a night PZ/LZ to be clear and unambiguous for helicopters using night vision gear. White, green, and blue are not part of the approved night marking palette, so none of these colors are used for night PZ/LZ marks. White can wash out against certain backgrounds or glare, green can be mistaken for aircraft navigation lights, and blue isn’t a standard signaling color for this purpose and can be hard to interpret in NVG conditions. By using the approved colors (the ones specifically designated for night PZ/LZ marking), you maximize contrast and avoid confusion with other signals a pilot might encounter.