The FAA extends the flight operational window to include civil twilight if there is _____.

The FAA extends the flight operational window to include civil twilight if there is _____.

• A. A waiver from the FAA
• B. Operating at or below 400 feet AGL
• C. Visual line of sight must be maintained
• D. Proper anti-collision lighting

Answer: (D)

Extending the operating window into civil twilight relies on making the UAS easy to see. Civil twilight is that period after sunset or before sunrise when there’s still light, but not full daylight. In lower light, a small unmanned aircraft can be hard to spot, increasing the risk of collisions. Proper anti-collision lighting on the aircraft addresses this visibility issue by making the drone conspicuous to other airspace users and people on the ground. With those lights functioning, the FAA allows operations during civil twilight, provided other safety rules (like maintaining visual line of sight) are followed. A waiver isn’t what enables this extension, and while staying under altitude limits and keeping sight of the drone are important, the anti-collision lighting specifically enables flights during civil twilight.

Extending the operating window into civil twilight relies on making the UAS easy to see. Civil twilight is that period after sunset or before sunrise when there’s still light, but not full daylight. In lower light, a small unmanned aircraft can be hard to spot, increasing the risk of collisions. Proper anti-collision lighting on the aircraft addresses this visibility issue by making the drone conspicuous to other airspace users and people on the ground. With those lights functioning, the FAA allows operations during civil twilight, provided other safety rules (like maintaining visual line of sight) are followed. A waiver isn’t what enables this extension, and while staying under altitude limits and keeping sight of the drone are important, the anti-collision lighting specifically enables flights during civil twilight.