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- Q131 - Deck Safety: Stability Problems
84. You are on a Mariner class cargo vessel. Your drafts are: FWD 17'-04″, AFT 19'-04″. You wish to increase the calculated GM of 3.0' to 4.2'. What tanks should you ballast? (Use the white pages in the Stability Data Reference Book.)
Ballasting tanks DB3 and DB4 lowers the ship's center of gravity (KG) sufficiently to increase the metacentric height (GM) from 3.0' to 4.2', as determined by referencing the Stability Data Reference Book.
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