The SS AMERICAN MARINER is ready to bunker...

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Question 1 of 2066636eec28f7522a1c51cbf6

The SS AMERICAN MARINER is ready to bunker with drafts of FWD 18'-06", AFT 20'-06". After all bunkers are on board, soundings indicate the tonnages shown in table ST-0099 below. Use the white pages of The Stability Data Reference Book to determine the free surface correction.

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Question 1 of 20

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🔍 Key Concepts

• Free surface effect (FSE) and how it reduces GM (metacentric height) and is applied as a free surface correction (FSC) in the stability book tables • How to use the white pages of the Stability Data Reference Book for the SS AMERICAN MARINER to find the Free Surface Moments (FSM) for each slack double bottom (DB) and deep tank (DT) given in table ST-0099 • The relationship between total FSM, ship’s displacement at the given drafts, and the resulting correction to GM in feet

💭 Think About

• From the ST-0099 table, which specific DB and DT tanks appear to contain bunkers after the operation, and are these likely to be completely full, completely empty, or slack? • Once you identify which tanks are slack, how do you look up the correct FSM values on the white pages, and what do you need to do with those individual FSMs to get a ship-wide value? • After you obtain the total FSM, what quantity from the hydrostatic data (at drafts FWD 18'-06" and AFT 20'-06") must you divide by to convert that FSM into a free surface correction in feet and compare with the answer choices?

✅ Before You Answer

• Confirm from the white pages tables which tanks are slack and that you are using the correct FSM column (not capacity or sounding-to-capacity tables). • Make sure you use the correct displacement (Δ) that corresponds to the vessel’s actual mean draft after bunkering (use the hydrostatic curves/tables, not a guessed value). • Verify that your final step is FSC = (Total FSM) / Δ, and that your units agree so the result is in feet of GM correction, then compare the magnitude with the multiple-choice options.

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