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- Master & Mate (Rivers (Limited Tonnage: Less Than 200 GRT)) »
- Q397 - Navigation General: Rivers
207. Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?
The true wind speed is calculated using the law of cosines, considering the ship's speed and the apparent wind as vectors with an included angle of 140 degrees, resulting in a true wind speed of approximately 11.0 knots.
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