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- Master & Chief Mate (Oceans or Near Coastal (Unlimited Tonnage)) »
- Q108 - Navigation Problems: Near Coastal
392. You are underway and intend to make good a course of 170° T. You experience a current with a set and drift of 050° T at 2.8 knots, and a easterly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 18.5 knots. What will be your speed made good over your intended course of 170° T?
To determine speed made good, resolve the current into components, calculate the crab angle needed to counteract the current's sideways effect, and then combine the ship's speed through the water with the current's opposing component along the intended course, resulting in a speed made good of 17.2 knots.
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