A concentration of weight has been shifted inboard to the center line of the vessel. Generally speaking, what effect will this have on the vessel?

Correct Answer: Option B — the vessel's rolling period will decrease

Shifting weight inboard toward the centerline increases the vessel's transverse metacentric height (GM). As GM increases, the vessel's righting arm becomes more powerful, resulting in a faster, more responsive reaction to heeling forces, which manifests as a decrease in the natural rolling period of the ship.