Palestine International Airport (Al-Auja)
10 .2.3 Approach Lighting System
- Approach lighting
- Approach lighting systems (ALS) are designed specifically to provide guidance for aircraft
approaching a particular runway under nighttime or other low-visibility conditions. While
under nighttime conditions it may be possible to view approach lighting systems from
several miles away. ALS is a configuration of signal lights starting at the landing threshold
and extending into the approach area a distance of 2400-3000 feet for precision instrument
runways.
- In the high-intensity ALSs, the 4m crossbars of five-bulb white light are placed at 30m
intervals for a distance of 731m from the runway threshold on the extended runway
centerline.
- The high-intensity ALSs have a long crossbar of green lights at the edge of the runway
threshold.
- The ALS system, shown in Figure 10- 23 , has two additional crossbars consisting of
three-bulb white light crossbars which are placed symmetrically about the runway
centerline at a distance of 150m from the runway threshold.
- Two additional three-bulb red light crossbars are placed symmetrically about the
extended runway centerline at 30m intervals for the inner 300m to delineate the edges of
the runway surface.