This form will compute the difference between ship heading and true wind direction and true wind speed. Difference between ship heading and apparent wind direction and apparent wind speed must be provided. Note that if apparent wind speed is supplied in knots, it is necessary to supply the ship speed in knots.

Difference Between Heading and Apparent Wind Direction:	(degrees)
Apparent Wind Speed: (Specify Units)
	Units of Ship's Speed	Knots
Ship's Speed:	(knots)
Difference Between Heading and True Wind Direction:	(degrees)
True Wind Speed:	(units of ship's speed)
	(knots)