If on the ground an altimeter reads 75 ft higher than the airport elevation, it will be legal for flying.
But at the decision altitude, on a ILS or LPV approach in IFR conditions down to the limits, such an altimeter will read 200 ft AGL when the airplane is actually only 125 ft AGL. How the pilot should deal with this? Should the pilot go missed, if the runway is not in sight at 275 ft (instead of 200 ft) or, before starting the approach, should the pilot adjust the altimeter to read 75 ft lower, after adjusting the altimeter using the setting provided by ATIS?
Or the 200 ft decision altitude takes into account the possibility of altimeter errors up to 75 ft ?
Thanks
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