Your vessel measures 126 feet (38.41 meters) long by 21 feet (6.4 meters) in beam. If the natural rolling period at a draft of 8 feet (2.44 meters) is 6 seconds, what is the GM?

Correct Answer: Option C — 2.4 feet (0.70 meters)

Applying naval architecture principles for vessel stability, GM = (f * B / T)^2. For a 21-foot beam and 6-second roll period, calculation using standard rolling coefficient yields 2.4 feet (0.70 meters).