Originally posted by Ksan
И это называется QFE.

Indicated Altitude – the altitude read on the altimeter when the current local altimeter setting is displayed in the Kohlsman window
Calibrated Altitude – the indicated altitude corrected for instrumental error
Mean Sea Level, Altitude – the actual distance above mean sea level and is found by correcting calibrated altitude for temperature deviations from the standard atmosphere
Above Level Ground Altitude – the aircraft’s height above the terrain directly beneath the aircraft and is measured in feat above ground level
Pressure Altitude – the height above the standard datum plane where barometric pressure is 29.92 in-Hg
Density Altitude – the altitude in the standard atmosphere that has the same density as the local air. It is found by correcting the pressure altitude for non standard temperature deviations (gives an idea of engines performance)