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Old 19th Aug 2013, 09:20
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24Carrot
 
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The correction angle is small, so you can do it fairly accurately with an ordinary calculator:

The headwind is 122-101 = 21 kts, so let's use that as the wind speed.

3 degrees wind correction angle at 122kts = D degrees wind angle at 21 kts.

D = 3 x (122/21) = -17.5

141 - 17.5 = 123.5

so roughly 124/21.
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