The SS AMERICAN MARINER has on board 4850 tons of cargo with an LCG-FP of 274.46 feet. See table ST-0195 below for the distribution of the cargo to be loaded. Use the white pages of The Stability Data Reference Book to determine the final LCG-FP of the cargo.
• How to combine an existing LCG-FP with additional cargo using total weight and total longitudinal moments • Using the Stability Data Reference Book white pages to find each compartment’s longitudinal center (LCG from FP) for the listed stowage locations • Applying the formula: new combined LCG = total longitudinal moments ÷ total weight
• For each space in table ST-0195, what two pieces of information do you need from the white pages before you can calculate its longitudinal moment? • Once you have all the individual longitudinal moments for the new cargo, how do you combine them with the original 4850 tons at LCG 274.46 ft to find a single final LCG? • After computing the new total weight and LCG, is the final LCG expected to move forward or aft of 274.46 ft, based on where most of the new cargo is being loaded?
• Confirm you sum all the new cargo weights and add them to the original 4850 tons to get the correct final total weight • Verify you calculate each new cargo moment correctly: Moment = (cargo weight in that space) × (space LCG from FP from the book) • Make sure you add the original cargo moment (4850 × 274.46) to the sum of all new cargo moments before dividing by the new total weight
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