What is a direct effect of a vessel having a high GM?

A vessel with a high metacentric height (GM) indicates greater stability. When the GM is high, it means that the center of gravity is significantly lower compared to the metacenter, providing a strong righting moment when the vessel is tilted. This righting moment helps the vessel return to an upright position more effectively after being heeled by waves or other forces.

Greater stability in rough seas is a crucial advantage, as it allows the vessel to mitigate the effects of rolling and pitching caused by turbulent water. The ability to remain upright and stable in challenging conditions enhances the safety of both the vessel and its crew. Therefore, the choice referring to greater stability in rough seas is directly correct because it relates to the mechanical principles governing vessel stability, where a higher GM contributes positively to the overall stability and performance of the vessel in adverse conditions.

The focus on stability is essential in maritime operations, particularly for a Chief Mate, since ensuring the vessel remains upright and stable directly influences safety, cargo integrity, and operational efficiency.