Canada’s Transportation Safety Board (TSB) believes that many pilots — if not most — are unaware of two important concepts. The first of them is that not all visual glideslope indicator systems (PAPI, VASI, etc.) are created equal; and secondly, that knowledge of an aircraft’s visual perspective, measured as eye-to-wheel-height (EWH), is necessary to assess whether a given visual glideslope indicator is appropriate for the aircraft being flown. In fact, even if a pilot knows the importance ...


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