Pressure and altimetry · Question 11 of 12
An aerodrome is 600 ft above sea level and the QNH is 1 013 hPa. Approximately which QFE is to be expected?
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Answer
- C About 993 hPa
Explanation
Near the ground the pressure decreases by about 1 hPa per 30 ft. 600 ft therefore corresponds to about 20 hPa. The QFE applies at aerodrome elevation and is therefore lower than the QNH reduced to sea level: 1 013 − 20 = 993 hPa.