A stop way is for emergency use only, and not for routine landings. Where a stop way is provided, the edge lights are red and facing one way so only the landing traffic is able to see them. One or two Omni-directional blue lights may replace or supplement the edge lights to indicate an exit taxiway. The area in front of the threshold is narrower than the associated runway width, the edges are lighted in blue. On a runway with a displaced landing threshold (an available area in front of the threshold for the take-off run and not the landing), the runway edge lights from the beginning of the pavement up to the displaced threshold are red.
Yellow caution zone lights are installed on ILS equipped runways without centreline lights, on the last 600m, or one third of the lighted runway length available, whichever is less. Runway Edge Lights are white lights situated along the edges of the declared runway width spaced at 60 meters. Note that centreline and touchdown zone lights are additional guidance in support of low visibility operations. ¶ TVASIĪ variation of the VASI is the T-VASI, which presentation is as shown below:Īll runways certified for night operations shall have: An aircraft with a high cockpit would have to see one red bar and two white bars. For a normal aircraft the correct approach path in this case would be indicated by two red bars and one white bar. There also exists a VASI consisting of three rows. On correct approach path, pilot must see a red light row and a white light row. It consists of two rows of two red and white lights which presentation is as shown below: ¶ Visual Approach Slope Indicator (VASI)Ī VASI system does much the same as a PAPI system. On runways where no public jet transport is carried out an Abbreviated PAPI (APAPI) may be installed. Any additional restrictions shall be published in the appropriate section in the local AIP. 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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