The SS AMERICAN MARINER is ready to load the cargo listed in table ST-0130 below. There is already 4260 tons of cargo on board with a KG of 25.8 feet. Use the white pages of the Stability Data Reference Book to determine the final KG of all the cargo after loading is completed.
• Use the combined KG formula: total moments divided by total weight • Each cargo item’s moment = weight in tons × its stowage location vertical center of gravity (KG) from the white pages for AMERICAN MARINER • Don’t forget to include the existing cargo on board (4260 tons at KG 25.8 ft) as one more weight–moment pair
• From table ST-0130 and the white pages, what is the KG for each deck or tank top listed (No. 1 Second Deck, No. 1 Third Deck, etc.)? • After you find each location’s KG, can you set up a small table of: weight, KG, and moment, and then sum all the weights and all the moments? • Once you compute the final combined KG, is it higher or lower than the original 25.8 ft, and does that trend make sense based on whether you are loading mostly high or low in the ship?
• Be sure you used the correct KG values for each specific hold and deck from the AMERICAN MARINER white pages (they differ by hold and level). • Confirm that the total final displacement you divide by equals: existing 4260 tons + all new cargo weights from ST-0130. • Before picking a choice, re-check that the direction of change in KG (up or down from 25.8 ft) is consistent with where the majority of the new weight is stowed (higher decks vs. tank tops).
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