FAA 107 Commercial Drone Pilot Practice Exam

What must a UAS be equipped with when operating during civil twilight?

1. Strobe lights

2. Anti-collision lights

3. Infrared lighting

4. Navigational beacons

The correct answer is: Anti-collision lights

When operating a UAS (Unmanned Aircraft System) during civil twilight, it is required to have anti-collision lights. These lights serve a critical function by enhancing the visibility of the drone to other pilots and observers, which is especially important in low-light conditions. Civil twilight occurs when the sun is just below the horizon, and visibility can be limited; therefore, having effective lighting helps prevent collisions and ensures safer operations. Anti-collision lights are specifically designed to be visible from a distance and draw attention to the drone's position. They typically blink or emit steady light, making it easier for others in the vicinity to see the drone, thereby reducing the risk of accidents. These lights contribute to the overall safety requirements that unmanned aircraft operators must adhere to, particularly in scenarios where visibility may be compromised. While strobe lights, infrared lighting, and navigational beacons serve various purposes, they do not fulfill the specific requirement for anti-collision lighting during twilight operations. Strobe lights can assist with visibility, but anti-collision lights are explicitly mandated for such conditions by regulations to avoid potential dangers.