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- Master & Chief Mate (Oceans or Near Coastal (Unlimited Tonnage)) »
- Q104 - Deck Safety: Stability Problems
387. Your vessel's drafts are: FWD 19'-03″, AFT 21'-03″. The LCG of the forepeak is 200 feet forward of amidships. How many tons of ballast must be pumped into the forepeak in order to have a drag of 18 inches? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)
To reduce the vessel's drag from 24 inches to 18 inches, approximately 31 tons of ballast must be pumped into the forepeak, as determined by the change-of-trim formula and hydrostatic table values from the Stability Data Reference Book.
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