You are hoisting a heavy lift with the jumbo boom. Your vessel displaces 8560 T. The 45-ton weight is on the pier and its center is 65' to starboard of the centerline. The head of the boom is 95' above the base line and the center of gravity of the lift when stowed on deck will be 55' above the base line. As the jumbo boom takes the strain the ship lists to 5.5°. What is the GM with the cargo stowed?

Question

Accepted Answer

Option A: 3.74 ft.. Initial list moment upon lifting is calculated using weight, distance to centerline, and boom height. Applying the shifted center of gravity formula for heavy lifts per stability reference standards determines the resulting metacentric height (GM) of 3.74 ft after final stowage.