A vessel's drafts are FWD 23'-01", AFT...

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Question 1 of 2066636eec28f7522a1c51d141

A vessel's drafts are FWD 23'-01", AFT 24'-11". Use the information in Section 1, the blue pages, of the Stability Data Reference Book to determine the final drafts if: (1) 142 tons are discharged 122 feet forward of amidships; (2) 321 tons are loaded 82 feet forward of amidships; and (3) 74 tons are discharged 62 feet aft of amidships.

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Question 1 of 20

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🔍 Key Concepts

• Trimming moment and how moving weight forward or aft affects drafts at the bow and stern • Using the MT1 (Moment to Change Trim 1 inch) or equivalent data from Section 1 (blue pages) of the Stability Data Reference Book • Converting between tons × feet (moment), trim in inches, and then distributing that trim between forward and aft drafts

💭 Think About

• For each weight movement (loading or discharging), decide: does it trim the vessel by the bow or by the stern? How do you know? • Calculate the trimming moment (tons × feet) for each step, then combine them to find the net trimming moment. What does the sign (forward/aft) tell you about the final trim? • Once you have the total change in trim in inches, how do you split that change between the forward and aft drafts using the distance between perpendiculars (LPP) or the length between draft marks?

✅ Before You Answer

• Be sure you are using the correct MT1 / MCT 1-inch value for this vessel from the blue pages, not a sample or another ship’s data • Confirm that discharging weight reduces displacement and loading weight increases displacement and that this affects mean draft separately from trim • Double‑check your arithmetic when converting feet to inches and when adding/subtracting trim at the forward and aft draft marks

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