EASA NAV(A)intermediate
55. Distance 75 NM, TAS 105 kt, headwind 12 kt, ETD 1242 UTC. What is ETA?
Answer
1330 UTC
Explanation
GS is 93 kt. The flight takes $75/93≈0.806$ h, about 48 minutes. Add 48 minutes to 1242 to obtain **1330 UTC**. **Key takeaway:** $ETA=ETD+d/GS$. **Glossary:** ETA: estimated time of arrival.
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