Thread: QNH or QFE ?
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Old 10th Aug 2018, 17:50
  #58 (permalink)  
Join Date: Nov 2005
Location: River Thames & Surrey
Age: 70
Posts: 7,987
Originally Posted by Jan Olieslagers View Post
In which case one pushes the appropriate button on the transponder, and reports what the display shows... Problem solved, indeed.
The altitude encoder transmits a reading based on 1013.2 hpa which is then converted by the radar display on the ground which has the current QNH fed into it and updated when necessary.

Last edited by chevvron; 11th Aug 2018 at 14:37.
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