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visual approach slope indicator system
- Definição1
- An arrangement of red and white lights on each side of the runway touchdown point to give the pilot information about the plane’s height on final approach.
- Fonte1
- CROCKER, David. Dictionary of aviation. 2nd ed. London: A&C, 2005.
- Definição2
- An airport lighting facility providing vertical visual approach to landing by radiating a directional pattern of high intensity red and white focused light beams that indicate to the pilot that is “on path” if he sees red/white, “above path” if white/white, and “below path” if red/red. Some airports serving large aircraft have three-bar VASIS that provide two visual glide paths to the same runway.
- Fonte2
- JEPPESEN. The aviation dictionary – for pilots and aviation maintenance technicians. Jeppesen Sanderson, Inc., 2003.
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 14 to the Convention on International Civil Aviation. Aerodromes. Volume I: aerodrome design and operation. 6th ed. Montreal, 2013.
- Fonte4
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 14 to the Convention on International Civil Aviation: aerodromes: volume 1: aerodrome design and operation. 8th ed. Montreal, 2018. (Annex 14).
- Nota Adicional1
- A visual approach slope indicator system shall be provided to serve the approach to a runway whether or not the runway is served by other visual approach aids or by non-visual aids, where one or more of the following conditions exist: a) the runway is used by turbojet or other aeroplanes with similar approach guidance requirements; b) the pilot of any type of aeroplane may have difficulty in judging the approach due to: 1) inadequate visual guidance such as is experienced during an approach over water or featureless terrain by day or in the absence of sufficient extraneous lights in the approach area by night; or 2) misleading information such as is produced by deceptive surrounding terrain or runway slopes; c) the presence of objects in the approach area may involve serious hazard if an aeroplane descends below the normal approach path, particularly if there are no non-visual or other visual aids to give warning of such objects; d) physical conditions at either end of the runway present a serious hazard in the event of an aeroplane undershooting or overrunning the runway; and e) terrain or prevalent meteorological conditions are such that the aeroplane may be subjected to unusual turbulence during approach.
- Nota Adicional2
- Acronym in English: VASIS.
- Contexto
- The presence of other visual or non-visual aids is a very important factor. Runways equipped with ILS or MLS would generally receive the lowest priority for a visual approach slope indicator system installation. It must be remembered, though, that visual approach slope indicator systems are visual approach aids in their own right and can supplement electronic aids. When serious hazards exist and/or a substantial number of aeroplanes not equipped for ILS or MLS use a runway, priority might be given to installing a visual approach slope indicator on this runway.
- Subárea
- Airport Infrastructure
- Related Term
- abbreviated T visual approach slope indicator system
- T visual approach slope indicator system
- visual approach
- Français
- indicateur visuel de pente d’approche
- Imagem
Visual approach slope indicator systems.
Source: INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 14 to the Convention on International Civil Aviation. Aerodromes. Volume I: aerodrome design and operation. 6th ed. Montreal, 2013.
Visual approach slope indicator system.
Fonte: https://heliportlighting.com/products/model-800-led-visual-approach-slope-indicator-vasi/