Which statement is true about light gun signals?

Which statement is true about light gun signals?

• A. Radio communications are functioning normally
• B. Radio communications have failed between ATC and an airfield driver
• C. ATC is directing all movements with hand signals
• D. Only visual signals from the cockpit are used

Answer: (B)

Light gun signals are used when radio communications fail, giving ATC a backup way to direct ground movements and aircraft on the airfield. If you’re an airfield driver and you see the ATC signal with the light gun, follow those instructions and proceed only as directed until radio communications are restored. That’s why the statement about radio communications having failed is the correct one—the gun signals are specifically there for that situation. The other ideas don’t fit: normal radio operation would not rely on the gun signals, hand signals alone aren’t the standard method for directing all movements, and you don’t rely only on cockpit visual cues when ground vehicles need ATC guidance.

Light gun signals are used when radio communications fail, giving ATC a backup way to direct ground movements and aircraft on the airfield. If you’re an airfield driver and you see the ATC signal with the light gun, follow those instructions and proceed only as directed until radio communications are restored. That’s why the statement about radio communications having failed is the correct one—the gun signals are specifically there for that situation. The other ideas don’t fit: normal radio operation would not rely on the gun signals, hand signals alone aren’t the standard method for directing all movements, and you don’t rely only on cockpit visual cues when ground vehicles need ATC guidance.