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- Q137 - Deck Safety
864. You are hoisting a heavy lift with the jumbo boom. Your vessel displaces 5230 T. The 35-ton weight is on the pier and its center is 60' to starboard of the centerline. The head of the boom is 105' above the base line and the center of gravity of the lift when stowed on deck will be 42' above the base line. As the jumbo boom takes the strain the ship lists to 5°. What is the GM with the cargo stowed?
The ship's GM is calculated by first determining GM with the load hanging, then adjusting for the vertical movement of the weight from the boom head to its stowed position, resulting in a GM of approximately 4.98.
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