EASA NAV(A)intermediate
TC 283°, distance 75 NM, TAS 105 kt, headwind 12 kt, ETD 1242 UTC. What is ETA?
Answer
1330 UTC
Explanation
GS = 105 − 12 = 93 kt. Time = 75/93 hours, approximately 48 minutes. Adding about 48 minutes to 1242 gives 1330 UTC. **Key takeaway:** A headwind reduces groundspeed and lengthens flight time. **Glossary:** **Headwind component**: Wind component opposing the direction of travel; **GS**: Speed over the ground.
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