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- Q154 - Navigation Problems: Oceans
242. If the height of the tide at low water is 0.0 feet, the range is 9.0 feet, and the duration is 06h 00m. What is the height of the tide 02h 12m before high water?
Applying the Rule of Twelfths, 3 hours and 48 minutes after low water corresponds to a tide height of 6.3 feet.
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