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Thread: why always high Qnh in mountain airports?
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Old 10th February 2002 | 14:28
  #15 (permalink)  
max motor
 
Joined: Apr 2000
Posts: 30
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From: london
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"This is true even if the actual pressure remains the same"

INCORRECT

A Barometric altimeter is calibrated to detect changes in pressure only. In fact great care is taken to ensure that temperature DOES NOT affect the reading.

Max
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