While underway in a field move with the lower hulls awash, a semisubmersible has an allowable KG of 63.69 feet; KMT is 65.12 and KML is 64.92. The KGT is 56.13 and KGL is 55.89. What is the GML?

Correct Answer: Option D — 9.03 feet

Longitudinal metacentric height (GML) is found by subtracting the longitudinal center of gravity (KGL) from the longitudinal metacenter height (KML). Using KML of 64.92 feet and KGL of 55.89 feet yields a GML of 9.03 feet, essential for evaluating trim and longitudinal stability under 46 CFR.