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 metacentric height corrected for longitudinal free surface effects?

Correct Answer: Option A — 5.66 feet

Longitudinal metacentric height is calculated by subtracting the longitudinal free surface correction from the longitudinal metacentric radius and uncorrected center of gravity height. Using the provided moments (VM, LM, FSML) per 46 CFR stability principles yields a corrected longitudinal metacentric height of 5.66 feet.