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- Q133 - Deck Safety: Stability Problems
175. Your vessel displaces 368 tons and measures 96'L x 28'B. You ship a large wave on the after deck. What is the reduction to GM due to free surface before the water drains overboard, if the after deck measures 42'L x 28'B and the weight of the water is 36 tons?
The reduction in GM due to free surface is 5.43 feet. This is calculated using the free-surface correction formula, which considers the second moment of area of the water surface and the total displacement volume, accounting for the weight of the shipped water.
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