EASA NAV(A)advanced
62. CAS is 155 kt at FL80 and OAT +15°C. What TAS is given by the question bank?
Answer
180 kt
Explanation
The item applies the supplied high-altitude temperature and airspeed conditions to produce **180 kt**. TAS differs from CAS because air density and compressibility affect the relationship. **Key takeaway:** TAS is not generally equal to CAS at altitude. **Glossary:** CAS: calibrated airspeed; FL: flight level; OAT: outside-air temperature.
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