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- Q330 - Navigation Problems: Chart Plot
39. At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102°T. If the height of the tide is +1.0 foot, what is the approximate depth of the water under the keel?
The correct answer is 19 ft (5.8 meters). This is determined by adding the tide height to the charted depth and then subtracting the vessel's draft, resulting in the under-keel clearance.
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