EASA NAV(A)basic
A headwind reduces groundspeed compared with true airspeed when the aircraft maintains the same track.
Answer
true
Explanation
A headwind opposes progress over the ground, so groundspeed is lower than true airspeed by the headwind component in the simple along-track case. A tailwind increases groundspeed. **Key takeaway:** Wind changes groundspeed, and therefore travel time.\n\n**Glossary:** **TAS**: true airspeed; **headwind component**: wind component opposing the route.
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