![]() Where a PAPI is used together with an ILS, it is located to align both glide slopes as much as practicable. There also are aerodromes where PAPI's are placed on both sides of the runway. However, where this is impracticable, it may be installed on the right side of the runway. PAPI's are usually situated to the left side of the runway. PAPI's are not designed to be used outside 15° of the runway centreline. The colour is depending on the vertical angle as shown in the illustration hereunder. It consists of a single row of 4 red and white lights. The PAPI provides a visual aid to determine the correct approach path. ¶ Visual Approach Slope Guidance ¶ Precision Approach Path Indicator (PAPI) Supplementary approach lights are installed the last 300m prior the runway threshold, consisting of a white centreline barrette and two red side barrettes. It commences 900m prior to the runway threshold (see the next figure).Īt aerodromes where CAT II and III approaches are conducted, supplementary approach lights are added to the system. The Calvert system consists of a white centreline and 5 white cross bars. Simple approach light system ¶ Precision version of approach lightsĪirfields can have more complex approach lighting systems used mainly in association with ILS equipped runways.Ī well-known system is the Calvert Approach lighting system. It starts 500m prior to the runway threshold (the green lights). ¶ Runway approach ramps ¶ Simple version of approach lightsĪ simple version of approach lighting consists of a low intensity white centreline and cross bar. This chapter will show the wide variety of approach lighting systems before the runway threshold and systems present on runways. ![]()
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