Question

In order to calculate QFE from QNH, what must be known?

a. Temperature at sea level
b. Atmospheric pressure at sea level
c. Humidity at sea level
d. Wind speed at sea level.

Answer 1

To calculate QFE from QNH, you need to know the atmospheric pressure at sea level and the pressure at a specific altitude.For example, if the QNH is 1013 hPa and the atmospheric pressure at a certain altitude is 1005 hPa, then the QFE can be calculated as 1013 - 1005 = 8 hPa.

Step-by-step explanation:

In order to calculate QFE from QNH, you need to know the atmospheric pressure at sea level, which is represented by QNH. QFE is the pressure at a specific altitude, and it can be calculated by subtracting the altitude's atmospheric pressure from QNH.

For example, if the QNH is 1013 hPa and the atmospheric pressure at a certain altitude is 1005 hPa, then the QFE can be calculated as 1013 - 1005 = 8 hPa.