The SS AMERICAN MARINER is ready to bunker with drafts of FWD 11'-01", AFT 15'-01". After all bunkers are on board, soundings indicate the tonnages shown in table ST-0091 below. Use the white pages of The Stability Data Reference Book to determine the free surface correction.

Question

The SS AMERICAN MARINER is ready to bunker with drafts of FWD 11'-01", AFT 15'-01". After all bunkers are on board, soundings indicate the tonnages shown  in table ST-0091 below. Use the white pages of The Stability Data Reference Book to determine the free surface correction.

Accepted Answer

Option D: 0.73 foot. Summing the free surface moments from sounding table ST-0091 for all partially filled bunker tanks and dividing by the final displacement determines the effective vertical rise of the center of gravity, resulting in a free surface correction of 0.73 foot.