What is the primary purpose of runway centerline lights?

The primary purpose of runway centerline lights is to assist pilots in landing under adverse visibility conditions. These lights, which are typically embedded along the runway centerline, provide visual guidance during approach and landing, especially in situations where visibility is compromised due to weather conditions such as fog, rain, or snow. The continuous alignment of centerline lights helps pilots maintain the correct path down the runway, reducing the risk of drift to the sides.

Although there are other lights and markings used for different purposes, the centerline lights specifically enhance situational awareness and safety during landing phases when visibility is low. Their clear visibility ensures that even in challenging weather, pilots can align their aircraft accurately with the runway, thus facilitating safer landings.