Your vessel measures 125 feet long by 17 feet in beam. If the natural rolling period at a draft of 7'-09" is 6 seconds, what is the GM?

Correct Answer: Option C — 1.55 feet

Using the standard empirical roll period formula GM = (f * B / T)^2, a 17-foot beam and 6-second roll period results in a calculated metacentric height of 1.55 feet.