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- Q122 - Deck Safety: Stability Problems
221. Your vessel measures 128 feet long by 21 feet in beam. If the natural rolling period at a draft of 7'-06″ is 6 seconds, what is the GM?
The correct answer is 2.37 feet. This is calculated using the formula GM = (0.44 * B / T)2, where B is the beam and T is the rolling period. Substituting the given values (B = 21 feet, T = 6 seconds) into the formula yields a GM of approximately 2.37 feet.
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