The DEEP DRILLER, at 60.0 feet draft in sea water, has VM = 974,441 foot-long tons, LM = 40,301 foot-long tons, TM = 3 foot-long tons, FSML = 30,572 foot-long tons, and FSMT = 18,732 foot-long tons. What is the KG corrected for longitudinal free surface effects?

Correct Answer: Option C — 55.47 feet

Corrected vertical center of gravity accounts for free surface effects. Adding the longitudinal free surface correction (1.69 feet) to the uncorrected KG (53.78 feet) produces the final corrected KG of 55.47 feet, confirming compliance with structural and stability criteria outlined in 46 CFR.