The SS AMERICAN MARINER has drafts of: FWD...

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Question 1 of 2066636eec28f7522a1c51cb94

The SS AMERICAN MARINER has drafts of: FWD 28'-00", AFT 30'-04". Use the white pages of the Stability Data Reference Book to determine the drafts if you ballast the forepeak with 110.8 tons of seawater.

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Question 1 of 20

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🔍 Key Concepts

• Trim and mean draft: how adding weight at the bow affects both drafts and the vessel’s trim • Using TPC (tons per centimeter immersion) or TS (tons per inch) and LCF (longitudinal center of flotation) from the Stability Data Reference Book white pages • Effect of adding weight at a known longitudinal position relative to LCB/LCF on forward and aft drafts

💭 Think About

• First, find how much the mean draft will change when you add 110.8 tons of seawater using the appropriate TPC/TS value for the starting draft • Then determine how much trim is created by adding this weight in the forepeak (consider its distance from LCF), and how that trim distributes between the forward and aft drafts • Apply the trim correction to the new mean draft to get individual forward and aft drafts, then compare with the answer choices

✅ Before You Answer

• Be sure you are using the correct displacement/TPC (or TS) and LCF for the vessel’s initial draft condition from the white pages • Check the sign of trim: adding weight in the forepeak should change which end goes deeper and which becomes shallower • Verify your final forward + aft drafts give the correct mean draft change that matches the added weight and TPC/TS values

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