The SS AMERICAN MARINER arrived in port with...

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Question 1 of 2066636eec28f7522a1c51cb5f

The SS AMERICAN MARINER arrived in port with drafts of: FWD 18'-06", AFT 21'-10". Cargo was loaded and discharged as indicated in table ST-0123 below. Use sheet 2 in the white pages of the Stability Data Reference Book to determine the final drafts.

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Question 1 of 20

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🔍 Key Concepts

• Use amidships as the reference point: treat weights forward of amidships as one sign and aft of amidships as the opposite when summing trimming moments. • Separate change in mean draft (from net weight loaded/discharged using TPI/tons per inch immersion) from change in trim (from total trimming moment using MT1"/moment to change trim 1 inch). • After finding the new mean draft and new trim, use the ship’s length between perpendiculars (LBP) and the relationship between mean draft, trim, and end drafts on Sheet 2 – AMERICAN MARINER hydrostatic data to get the final forward and aft drafts.

💭 Think About

• What is the net change in displacement after all four weight movements, and how does that alone change the mean draft using the TPI from Sheet 2? • When you compute each weight’s moment about amidships (tons × distance), what is the algebraic sum of trimming moments, and how many inches of trim does that correspond to using MT1" for the original mean draft? • Given the new mean draft and total trim, how do you split that trim between the forward and aft drafts using LBP so you can compare your calculated drafts to the multiple‑choice options?

✅ Before You Answer

• Be sure that loads are positive and discharges are negative when summing both weight and trimming moments. • Check that forward distances are given one sign and aft distances the opposite, and that you have converted feet of distance into the correct units if Sheet 2 requires it. • After you compute the new forward and aft drafts, confirm that their average equals your new mean draft and that the difference equals your total trim before choosing from the answer options.

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