The SS AMERICAN MARINER has on board 5540 tons of cargo with an LCG-FP of 272.20 feet. See table ST-0169 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.
• Use the LCG = (sum of moments) / (sum of weights) method for longitudinal centers of gravity • Distinguish between the existing cargo (5540 tons at LCG-FP 272.20 ft) and the additional cargo in each hold/deck from table ST-0169 • From the white pages, for each space (e.g., No. 1 Main Deck, No. 2 Second Deck, etc.), use the listed LCG from FP for that location, not the frame number
• How do you combine an existing weight at a known LCG with several new weights at different LCGs to find a final combined LCG? • When you look up the LCG for, say, No. 1 Main Deck in the Stability Data Reference Book, what two numbers do you multiply together to get that compartment’s moment? • After summing all the moments and all the weights, where do you expect the final LCG to move: slightly forward or aft of 272.2 ft, based on whether more weight is going forward or aft?
• Verify whether the weights listed in the table (120, 120, 130, etc.) are additional tons to be loaded, not the total on board already • Carefully sum all the new cargo weights and add them to 5540 tons to get the correct total weight before dividing • Double‑check that each moment uses the correct LCG from the white pages for that exact hold/deck, not a similar but wrong compartment
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