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PPL Buddy
UK PPL(A)

Wind star

One wind, every leg. Enter the forecast wind (F214 spot wind) and your TAS: the star shows groundspeed all round the compass, and the legs table gives the heading to steer.

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Each spoke is a track; the figure at its tip is your groundspeed along it. The dashed ring is TAS 90 kt, the magenta arrow the wind (240/20).

Legs

Add each leg of your route to read off heading, drift and time.

Headings are °T at the TAS entered: apply variation for a compass heading, and remember the forecast wind is an average. The theory lives in the triangle of velocities in the Navigation study guide.