Question 2187 Deck Safety

The correct answer is C) righting arm. When a vessel has positive stability, the distance between the line of force through the center of buoyancy (B) and the line of force through the center of gravity (G) is called the righting arm. This righting arm creates a righting moment, which is the product of the righting arm and the weight of the vessel, and allows the vessel to return to an upright position when heeled. The other options are incorrect because the metacentric radius is the distance between the center of gravity and the metacenter, the righting moment is the product of the righting arm and the weight of the vessel, and the metacentric height is the distance between the center of gravity and the metacenter.