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- Q122 - Deck Safety: Stability Problems
185. Your vessel displaces 740 tons and measures 141'L by 34'B. What is the reduction in GM due to free surface if the fish hold (41'L by 30'B by 9'D) is filled with 2.5 feet of water? (Each foot of water weighs 35.1 tons)
The reduction in GM due to free surface is calculated using the formula (weight per foot of liquid x tank breadth2) ÷ (12 x current displacement). This requires the tank's breadth and the vessel's displacement including the weight of the liquid, resulting in a reduction of 3.18 feet.
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