Apparent wind (with respect to True North)
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definition: A wind vector with a speed referenced to the vessel and a direction referenced to True North

graphic
figure apparent wind with respect to True North (no scale drawing)

legend:
A = Ships ground course
B = Apparent wind direction with respect to True North
C = True wind direction
0-1 =Ships ground speed
2-0 = Apparent wind speed
3-0 = True wind speed