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ALS (1)
- Usado para
- approach lighting system
- Sinônimos
- approach light system
- Definição1
- An airport lighting facility which provides visual guidance to landing aircraft by radiating light beams in a directional pattern by which the pilot aligns the aircraft with the extended centerline of the runway on his/her final approach for landing.
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Pilot/controller glossary (P/CG). 2014. Disponível em: https://www.faa.gov/air_traffic/publications/atpubs/pcg/index.htm. Acesso em: 10 jun. 2014.
- Definição2
- A system of high-intensity lights located along the approach path of an instrument runway. The lights radiate beams in a directional pattern by which pilot aligns the aircraft with the extended centerline of the runway on the final approach for landing.
- Fonte2
- KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
- Definição3
- In modern large airfields, any of several systems of light extending along projected centerline of runway in use towards approach aircraft to provide visual indication of runway location, distances, alignment, glide path slope and, probably, transverse horizontal.
- Fonte3
- GUNSTON, Bill. The cambridge aerospace dictionary. Cambridge: Cambridge University, 2004. vii, 740 p. (Cambridge aerospace series.)
- Nota adicional1
- Condenser-Discharge Sequential Flashing Lights/Sequenced Flashing Lights may be installed in conjunction with the ALS at some airports. Types of Approach Light Systems are: 1.ALSF-1- Approach Light System with Sequenced Flashing Lights in ILS Cat-I configuration. 2.ALSF-2- Approach Light System with Sequenced Flashing Lights in ILS Cat-II configuration. The ALSF-2 may operate as an SSALR when weather conditions permit. 3.SSALF- Simplified Short Approach Light System with Sequenced Flashing Lights. 4.SSALR- Simplified Short Approach Light System with Runway Alignment Indicator Lights. 5.MALSF- Medium Intensity Approach Light System with Sequenced Flashing Lights. 6.MALSR- Medium Intensity Approach Light System with Runway Alignment Indicator Lights. 7.RLLS- Runway Lead-in Light System Consists of one or more series of flashing lights installed at or near ground level that provides positive visual guidance along an approach path, either curving or straight, where special problems exist with hazardous terrain, obstructions, or noise abatement procedures. 8.RAIL- Runway Alignment Indicator Lights- Sequenced Flashing Lights which are installed only in combination with other light systems. 9.ODALS- Omnidirectional Approach Lighting System consists of seven omnidirectional flashing lights located in the approach area of a nonprecision runway. Five lights are located on the runway centerline extended with the first light located 300 feet from the threshold and extending at equal intervals up to 1,500 feet from the threshold. The other two lights are located, one on each side of the runway threshold, at a lateral distance of 40 feet from the runway edge, or 75 feet from the runway edge when installed on a runway equipped with a VASI.
- Nota adicional2
- They assist the pilot in transitioning from instrument flight conditions to visual conditions at the end of an instrument approach. These lights extend into the approach area up to a distance of 2400 to 3000 ft (730-900 m) for the precision instrument runway and 1400 to 1500 ft (420-450m) for the non-precision runway.
- Nota adicional3
- Information regarding this term is a result of researches developed by DECEA in cooperation with ANAC.
- Português
- sistema de luzes de aproximação