EASA NAV(A)advanced
64. At FL75, OAT is −9°C and QNH altitude is 6500 ft. What is true altitude?
Answer
6250 ft
Explanation
The air is colder than standard, so true altitude is lower than the indicated/QNH altitude for the stated conditions; the supplied correction gives **6250 ft**. **Key takeaway:** Cold air makes true altitude lower than indicated altitude. **Glossary:** True altitude: actual height above mean sea level.
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