The white tail-light of an aircraft shows through how many degrees from dead astern?

The correct answer, which is 70 degrees, is based on the standard visibility range for aircraft tail lights. The white tail-light of an aircraft is designed to aid in maintaining visual situational awareness during operations. Specifically, it is visible from directly behind the aircraft (dead astern) out to a range of 70 degrees on either side of the centerline of the aircraft.

This means that a pilot observing from behind the aircraft can see the white tail-light approximately 35 degrees to each side of the dead astern position, which totals 70 degrees. This placement is critical for collision avoidance, especially during night flying, as it allows aircraft to be seen from behind and contributes to overall safety in the airspace. Understanding the orientation and visibility of aircraft lights is essential for pilots to accurately assess their surroundings and avoid potential hazards.