The SS AMERICAN MARINER arrived in port with...

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Question 1 of 2066636eec28f7522a1c51cb5c

The SS AMERICAN MARINER arrived in port with drafts of: FWD 17'-10", AFT 19'-06". Cargo was loaded and discharged as indicated in table ST-0134 below. Use sheet 2 in the white pages of the Stability Data Reference Book to determine the final drafts.

Load 95 tons---210 feet fwd of amidships Discharge 160 tons---60 feet fwd of amidships Load 140 tons---60 feet aft of amidships Load 170 tons---190 feet aft of amidships

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Question 1 of 20

66636eec28f7522a1c51cb5c

Load 95 tons---210 feet fwd of amidships Discharge 160 tons---60 feet fwd of amidships Load 140 tons---60 feet aft of amidships Load 170 tons---190 feet aft of amidships

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🔍 Key Concepts

• Use sheet 2 – Trim Problems in the Stability Data Reference Book and identify the ship’s displacement and TPC (tons per inch immersion) at the original mean draft • Compute the total longitudinal moment of all load and discharge operations about amidships; remember load = +moment, discharge = –moment • Convert the net trimming moment into change of trim using the vessel’s MCT 1-inch (moment to change trim 1 inch) from sheet 2, then split that trim between bow and stern

💭 Think About

• What is the vessel’s initial mean draft and how do you find the corresponding displacement, TPC, and MCT 1-inch on sheet 2? • After you calculate each individual longitudinal moment (weight × distance), what is the algebraic sum of all those moments and does that net moment tend to trim the vessel by the head or by the stern? • Once you know the total change in trim (in inches), how do you convert that into change at the bow draft and change at the stern draft, and then apply any change in mean draft due to net weight change?

✅ Before You Answer

• Be sure you are using distances forward as positive and aft as negative (or vice versa) consistently for all four weight changes • Verify the net weight change (total load minus total discharge) and apply it to the mean draft using TPC before you apply the trim correction to bow and stern drafts • Double-check that the final drafts you compute still give a trim difference (aft draft – forward draft) that is consistent with your calculated total change in trim

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Question 1 of 2066636eec28f7522a1c51cb5c

Load 95 tons---210 feet fwd of amidships Discharge 160 tons---60 feet fwd of amidships Load 140 tons---60 feet aft of amidships Load 170 tons---190 feet aft of amidships

Back

Question 1 of 20

66636eec28f7522a1c51cb5c

Load 95 tons---210 feet fwd of amidships Discharge 160 tons---60 feet fwd of amidships Load 140 tons---60 feet aft of amidships Load 170 tons---190 feet aft of amidships

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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