What requirement is in place for moving an aircraft in a night-flight operations area from sunset to sunrise?

In night-flight operations, the requirement that pertains to moving an aircraft from sunset to sunrise emphasizes the importance of safety and visibility. It is crucial for an aircraft to navigate in areas marked by obstruction lights during these hours. Obstruction lights are designed to illuminate obstacles that could pose a hazard to aircraft, enhancing visibility for pilots and ground crews alike. These lights help ensure that any structures, terrain features, or potential hazards are readily visible to prevent accidents during nighttime operations.

Throughout the night, the illumination provided by obstruction lights significantly aids in maintaining situational awareness, which is essential for the safety of the flight operations. Therefore, ensuring that the aircraft is moved within areas that have these designated obstruction lights is a vital practice for night operations, ultimately contributing to the safety and efficient maneuvering of aircraft during the darker hours.