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abbreviated T visual approach slope indicator system
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 14 to the Convention on International Civil Aviation. Aerodromes. Volume I: aerodrome design and operation. 6th ed. Montreal, 2013.
- Nota adicional1
- The AT-VASIS shall consist of ten light units arranged on one side of the runway in the form of a single wing bar of four light units with a bisecting longitudinal line of six lights. The light units shall be constructed and arranged in such a manner that the pilot of an aeroplane during an approach will: a) when above the approach slope, see the wing bar(s) white, and one, two or three fly-down lights, the more fly-down lights being visible the higher the pilot is above the approach slope; b) when on the approach slope, see the wing bar(s) white; and c) when below the approach slope, see the wing bar(s) and one, two or three fly-up lights white, the more fly-up lights being visible the lower the pilot is below the approach slope; and when well below the approach slope, see the wing bar(s) and the three fly-up lights red. When on or above the approach slope, no light shall be visible from the fly-up light units; when on or below the approach slope, no light shall be visible from the fly-down light units.
- Nota adicional2
- Acronym in English: AT-VASIS.
- Subárea1
- Airport Infrastructure
- Related Term
- visual approach slope indicator system
- Português
- sistema visual abreviado T indicador de rampa de aproximação
- 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.