runway centerline lighting system

runway centerline lighting system

runway centerline lighting systemclick for a larger image
The runway centerline lighting system consists of a single light installed at uniform intervals along the runway centerline to provide a continuous lighting reference from threshold to threshold. The lights start from 75 ft (25 m) from the landing threshold and extend to within 75 ft of the end of the runway—the lights themselves are spaced at 50-ft (15 m) intervals. When viewed from the landing threshold, the runway centerline lights are white until the last 3000 ft (900 m) of the runway. The white lights begin to alternate with red for the next 2000 ft (600 m), and for the last 1000 ft (300 m) of the runway, all centerline lights are red. If the runway centerline lights are spaced at 25-ft (7.5 m) intervals, alternate pairs of red and white lights should be used on the section from 3000 to 1000 ft (900–300 m) from the runway end. Where the runway are less than a 6000-ft (1800 m) length, the alternate red and white extends from the midpoint of the runway usable for landing to 1000 ft (300 m) the runway end.
References in periodicals archive ?
Kandel questioned, "If ICAO claims that the Nepalese Airport is good and functional, as denoted from the 66% rating, even though it operates on a 62 years old runway, then we have to question further why it has standardized the life of an International Runway to be 15-20 years maximum?" He also added that it would have been possible for Turkish Airlines Flight TK 726 pilot to land through the dense fog, rather than skid off the runway as it did-ceasing flights to and from Nepal for multiple days if Runway Centerline Lighting System were available.