The primary function of REIL is to aid pilots in identifying what?

The primary function of Runway End Identifier Lights (REIL) is to assist pilots in identifying the runway ends, particularly during approaches and landings. REIL systems are designed to provide visual cues to pilots, enhancing their ability to locate the runway, especially in low visibility conditions or at night. The lights are typically placed on both sides of the runway threshold and consist of a pair of synchronized lights that flash, making them easily distinguishable.

Their primary purpose is to enhance safety by clearly marking the end of the runway, which is crucial for pilots as they prepare to land. By directing attention to the runway's physical boundary, REIL helps prevent mishaps that could arise from misjudging the runway's location. This makes understanding their function key for airport operations and management, as reliable visual aids are essential for ensuring the safety of flight operations.