Pressure and altimetry · Question 6 of 12
You fly from a high into a low without resetting the altimeter. What applies to your actual altitude?
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Answer
- D You are lower than the altimeter indicates
Explanation
When the pressure falls, the altimeter holds a pressure level that lies closer to the ground in the low. The aeroplane therefore descends unnoticed. Mnemonic: "From high to low, look out below." That is why the QNH is updated regularly en route.