What is the purpose of Runway Centerline Lights?

Runway Centerline Lights are specifically designed to enhance safety during landings, especially when visibility is compromised. These lights provide pilots with guidance by illuminating the centerline of the runway, ensuring that they can align their aircraft accurately during approach and landing phases. The lights typically consist of white lights that run along the runway's centerline and change to yellow as the aircraft approaches the runway's end, indicating a critical point during landing.

This functionality is particularly crucial when weather conditions are poor, such as during fog, rain, or at night when natural light is limited. By providing a clear visual reference, Runway Centerline Lights help reduce the risk of runway incursions or misalignment, thereby improving overall safety during critical phases of flight.

In contrast, other options focus on different aspects of runway use or aircraft navigation. For instance, indicating runway length pertains to marking the physical dimensions of the runway, while enhancing aircraft navigation could involve various aids but is not specifically the role of centerline lights. Meanwhile, marking runway boundaries relates to the edges of the runway but does not address the specific purpose of the centerline lights themselves.