Your vessel measures 128 feet long by 21 feet in beam. If the natural rolling period at a draft of 7'-06" is 6 seconds, what is the GM?

Correct Answer: Option B — 2.37 feet

Transverse stability is calculated using GM = (f * B / T)^2. For a vessel with a 21-foot beam and a 6-second roll period, the resulting metacentric height is 2.37 feet.