A typical T-VASIS lightbox - this one is from the transverse part of the 'T'. The transverse lights remain visible at all times, unlike those from the 'stem' of the T which become visible only when the aircraft deviates above or below the visual glideslope. The lightboxes have different covers and internal fittings depending on their role and position within the system.
Although widely regarded as the best visual approach slope guidance system in the world, one of the disadvantages of T-VASIS is cost of laying and maintaining pads so as to accurately level the lightboxes.
This photo was taken abeam the touchdown point of Runway 14 at Bundaberg, Qld., in July 2003. The aircraft at the terminal is a Sunstate Airlines Canadair Dash 8.
Click here to see the earlier Type A style of light unit
(Photo: Phil Vabre collection)
Click here to read about the history of T-VASIS
Click here to read the Pilots' Notes on T-VASIS
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