Soar to New Heights with the 2025 Commercial Pilot License (CPL) Practice Exam – Ready for Takeoff!

Aviation obstruction lighting is designed to make tall structures, such as towers and communication masts, more visible to pilots, especially at night or in low visibility conditions. The use of a combination of red and white lights serves two main purposes.

Firstly, red lights are typically used for nighttime conditions, as they are less disturbing to the surrounding environment and are more visible to pilots during the dark. Secondly, white lights are used during the day, as they are more conspicuous in daylight. The combination of both red and white lights ensures visibility in different lighting conditions, making it safer for aircraft to navigate around tall structures. Additionally, regulations set by aviation authorities often require this dual-lighting system for certain structures of significant height.

This comprehensive approach to obstruction lighting helps ensure that pilots can see these hazards clearly regardless of the time of day, thereby enhancing overall flight safety. Other options listed do not provide this necessary dual-functionality of visibility at varying times of day.