EASA NAV(A)intermediate
TC 245°, distance 210 NM, TAS 130 kt, headwind 15 kt, ETD 0915 UTC. What is ETA?
Answer
1105 UTC
Explanation
Estimated GS is 130 − 15 = 115 kt. Flight time is 210/115 = 1.826 hours, approximately 1 hour 50 minutes. Adding this to 0915 gives about 1105 UTC. **Key takeaway:** Calculate GS before dividing distance by speed. **Glossary:** **TAS**: True airspeed; **GS**: Groundspeed; **ETD**: Estimated time of departure; **ETA**: Estimated time of arrival.
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