Safety & Environmental Protection (Deck) USCG Question #3306 (Set 94)

The SS AMERICAN MARINER is ready to bunker with drafts of FWD 13'-10", AFT 16'-04". After all bunkers are on board, soundings indicate the tonnages shown in table ST-0179 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 D — 1.01 foot

The virtual rise in the center of gravity due to slack tanks is calculated by dividing the total free surface moments by the vessel's displacement. Using table ST-0179, the sum of the moments divided by the displacement at the given draft results in a correction of 1.01 feet.

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