Norwegian investigators have determined that weak altimeter procedures resulted in a Wideroe De Havilland Dash 8-300 crew’s forgetting to set and check the correct QNH pressure during an approach to ...
French investigation authority BEA believes the prevalence of ILS approaches has obscured an underlying vulnerability of aircraft to the risk of terrain collision arising from incorrect altimeter ...
Altimeters measure atmospheric pressure, not true altitude, and are prone to inherent errors because real-world conditions rarely match the "standard atmosphere" they are calibrated against.
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