The SS AMERICAN MARINER is ready to bunker with drafts of FWD 12'-07", AFT 16'-01". After all bunkers are on board, soundings indicate the tonnages shown in table ST-0167 below. Use the white pages of The Stability Data Reference Book to determine the free surface correction.
Official USCG Answer & Rule Citation
Correct Answer: Option B — 1.07 foot
Free surface correction is a critical component of the vessel's stability report. Using the data from table ST-0167 and the displacement corresponding to the given drafts, the total free surface moments divided by the displacement results in a correction of 1.07 feet.
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