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- Q131 - Deck Safety: Stability Problems
200. Your vessel displaces 840 tons and measures 146'L x 38'B. You ship a large wave on the after deck. What is the reduction in GM due to free surface before the water drains overboard, if the after deck measures 65'L x 38'B and the weight of the water is 76 tons?
Calculate the reduction in GM due to free surface by using the free-surface dimensions of the water on deck and the ship's total displacement, which includes the weight of the shipped water.
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