You are on a vessel with a 30' mean draft. While maneuvering away from the dock at slow-speed the vessel grounds near the bow area on hard sand. In order to achieve an additional three foot of trim by the stern, you need to shift ballast from the forepeak, which is full, to the after peak, which is empty. Your ballast pump for this operation has a capacity of 85 tons per hour. How much tonnage needs to be shifted and how long should it take?

Question

Accepted Answer

Option D: The tons to shift for a 36" trim exceeds the tank capacity.. Calculating the required shift for a 36-inch trim change involves the vessel's longitudinal metacentric height and tank positions. Given the limited capacity of the fore and after peaks, the required weight shift to achieve such a significant trim change exceeds the physical volume available in those specific tanks.