Your vessel's drafts are FWD 20'-09", AFT...

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Question 1 of 2066636eec28f7522a1c51d135

Your vessel's drafts are FWD 20'-09", AFT 21'-01". Use the information in Section 1, the blue pages, of the Stability Data Reference Book to determine the final drafts if: (1) 320 tons are loaded 47 feet forward of amidships; (2) 82 tons are discharged 110 feet forward of amidships; and (3) 50 tons of fuel are pumped 60 feet forward.

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Question 1 of 20

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🔍 Key Concepts

• Trimming moment and how longitudinal moments change drafts forward and aft • Using the Stability Data Reference Book – Section 1 (blue pages) for tons-per-inch immersion (TPI) and moment-to-change-trim (MCT) per inch/foot • The sign convention for moments about amidships (forward vs aft of midships)

💭 Think About

• First, determine the net weight change and where the combined center of that weight shift is located relative to amidships. How does that affect trim (bow down or stern down)? • Use the blue pages to find the correct MCT value for the vessel’s mean draft, then compute the total trimming moment from all three operations. How many inches (or feet) of trim does that moment create? • Once you know the total trim change, divide it between forward and aft drafts using the vessel’s length between perpendiculars (LBP). How much does each end change from the original drafts?

✅ Before You Answer

• Confirm you are using the correct MCT and TPI that correspond to the initial (or appropriate mean) draft in the blue pages • Check the sign of each moment: loads/discharges forward of amidships vs aft, and make sure you are adding/subtracting correctly • After you get your new FWD and AFT drafts, verify that the change in mean draft matches the net weight change and TPI from the tables

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