The SS AMERICAN MARINER is ready to load the cargo listed in table ST-0008 below. There is already 4184 tons of cargo on board with a KG of 27.8 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 center of gravity (KG) formula to mix existing cargo with new cargo • From the white pages of the Stability Data Reference Book, each stowage location (e.g., No. 2 Tank Top, No. 4 Second Deck) has its own VCG or vertical moment per ton • Adding weight high raises KG; adding weight low lowers KG—estimate whether the final KG should be higher or lower than 27.8 ft
• First, add up the total tons of new cargo from all the listed locations, then combine that with the 4184 tons already on board—what is the new total cargo weight? • For each stowage location, what is the VCG or moment per ton from the white pages, and what happens when you multiply it by the tons loaded there? • Before you divide to get the new KG, think: are most of these tons going on tank tops/low decks or on second/third decks—so should the combined KG move up or down from 27.8 ft?
• Be sure you use the existing cargo moment: (4184 tons × 27.8 ft) before adding moments from new cargo • Confirm you have included every line of the loading table in your total weight and total moment sums • After you compute the final KG, check if its trend (higher or lower than 27.8 ft) matches where the majority of the new weight was stowed
No comments yet
Be the first to share your thoughts!