EASA NAV(A)basic
Select ALL correct statements about speed and time calculations.
Answer
Distance equals groundspeed multiplied by time, Time equals distance divided by groundspeed, A tailwind normally increases groundspeed, A headwind normally decreases groundspeed
Explanation
The core relationships are $D=GS\times t$ and $t=D/GS$. Wind components along the track either assist or oppose movement over the ground. These estimates assume the groundspeed is representative for the leg. **Key takeaway:** Calculate with groundspeed, not airspeed, when estimating route time.\n\n**Glossary:** **Tailwind component**: wind component assisting progress along track.
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