The DEEP DRILLER, at 60.0 feet draft in sea water, has VM = 974,441 foot-long tons, LM = 3 foot-long tons, FSML = 30,572 foot-long tons, and FSMT = 18,732 foot-long tons. What is the transverse free surface correction to KG?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 1.03 feet
Transverse free surface correction is calculated by dividing the transverse free surface moment (FSMT) by the total vessel displacement (VM). For this mobile offshore drilling unit, dividing 18,732 foot-long tons by 974,441 foot-long tons yields a transverse free surface correction of 1.03 feet to KG.
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