While in transit at a draft of 10.5 feet, the COASTAL DRILLER has a KGT of 60.0 feet. What is the GMT?

Correct Answer: Option D — 78.89 feet

Transverse metacentric height (GMT) is calculated by subtracting the vertical center of gravity corrected for free surface (KGT) from the height of the transverse metacenter (KMT) found in hydrostatic tables. For this draft, subtracting 60.0 feet from the tabulated KMT yields 78.89 feet.