White over red navigation lights indicate which event?

• A. Pilot ahead
• B. Not under command
• C. Towing at night
• D. Fishing at night

Answer: (A)

White over red indicates a harbor pilot is aboard or about to take control of the vessel. This signaling tells other vessels in the area to slow down, give way, and follow the pilot’s directions as the ship is guided through restricted waters or around harbor entrances. The other choices don’t fit because their corresponding light patterns involve different configurations: not under command uses a different red-light arrangement, towing at night requires a yellow towing light, and fishing at night has its own distinct lighting pattern that does not include white over red.