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    T-Visual Approach Slope Indicator System (T-VASIS) versus Precision Approach Path Indicator (PAPI) – the debate revisited

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    AERP2011-020 Lewis.pdf (1.322Mb)
    Abstract
    Two visual approach slope indicator lighting systems are in use in Australasia. These systems are designed to ameliorate and overcome the visual illusions associated with the approach and landing manoeuvre of aircraft. Using a flight simulator, 14 student pilot candidates, with little actual flying experience, ‘flew’ 10 approaches using PAPI and 10 approaches using T-VASIS. The approaches were ‘flown’ in various flight conditions including low visibility. The visual approach slope indicator lighting system was randomly assigned to each experimental condition. Results indicated that overall, there was less deviation from a correct glidepath when the approaches were ‘flown’ using T-VASIS. A post-flight survey indicated that participants found T-VASIS to be more intuitive. The results are discussed with reference to the prevailing preference of PAPI over T-VASIS by aviation authorities.
    Citation
    T-Visual Approach Slope Indicator System (T-VASIS) versus Precision Approach Path Indicator (PAPI) – the debate revisited. Aviation Education and Research Proceedings, vol 2011, pp 20-30.
    Lewis, Raymond (2011). T-Visual Approach Slope Indicator System (T-VASIS) versus Precision Approach Path Indicator (PAPI) – the debate revisited. Aviation Education and Research Proceedings, vol 2011, pp 20-30.
    Date
    2011
    Author
    Lewis, Raymond
    URI
    http://hdl.handle.net/10179/3712
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