Your vessel displaces 479 tons. The existing deck cargo has a center of gravity of 3.0 feet above the deck and weighs 16 tons. If you load 23 tons of anchor and anchor chain with an estimated center of gravity of 9 inches above the deck, what is the final height of the CG above the deck?
• Shift of center of gravity with added weights • Using the moment = weight × distance relationship • Combining multiple weights to find a combined (resultant) center of gravity
• How do you find the vertical CG of two different weights located at different heights above the same reference (the deck)? • What is the proper way to convert 9 inches to feet before using it in your calculations? • After finding the combined CG of the deck cargo and new load relative to the deck, how do you check if your value is reasonable compared to each individual CG height?
• Be sure to convert all distances into the same unit (feet) before multiplying by weight • Use the formula Total moment ÷ Total weight to get the combined CG height • Check whether your final CG height should lie between 0.75 ft (9 in) and 3.0 ft, closer to the heavier effective moment contribution.
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