When must the anti-collision light system be operational during flight?

The anti-collision light system, commonly known as strobe lights or beacon lights, is designed to enhance the visibility of an aircraft to others, particularly during critical phases of flight. The requirement for this system to be operational at all times during flight—both day and night—is rooted in safety protocols.

Operating the anti-collision lights continuously ensures that the aircraft is visible to other pilots and ground personnel, reducing the risk of mid-air collisions and accidents during taxiing or takeoff. This is especially crucial in busy airspace or around airports, where many aircraft are operating simultaneously.

While the other scenarios might suggest appropriate times for the anti-collision lights to be operational, the safety standard mandates that the lights should be on during all flight operations regardless of visibility conditions. This continuous operation contributes to the overall safety and situational awareness surrounding the aircraft.