Your vessel's has a beam of 60 feet, and you observe a still water rolling period of 25 seconds. What is the vessel's metacentric height?

Correct Answer: Option B — 1.1 ft

The approximate GM is found using the empirical formula GM = (f * B / T)^2. With a 60-foot beam and a 25-second roll period, applying standard factor f = 0.40 yields 1.1 feet.