Pressure altitude
From Wikipedia, the free encyclopedia.

Pressure altitude, an aviation term, is the indicated altitude when an altimeter is set to 1013 hPa (29.92 inHg US and Canada). It is primarily used in aircraft performance calculations, and in high-altitude flight (Class A airspace in the United States).

See also:

• flight level

The original article can be found at: http://en.wikipedia.org/wiki/Pressure_altitude.
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