What is considered a suitable value for metacentric height (GM) for conventional vessels?

The range of metacentric height (GM) that is considered suitable for conventional vessels typically falls between 0.5 to 1.5 meters. This range indicates a balance between stability and seaworthiness for vessels. A GM in this range provides adequate stability to ensure that the vessel can return to an upright position efficiently after being heeled by external forces, such as waves or wind.

A metacentric height that is too low may result in reduced stability and increased risk of capsizing, while a GM that is too high could make the vessel overly stiff, leading to uncomfortable motions and potential structural stress. Therefore, a GM value in the range of 0.5 to 1.5 meters is ideal for conventional vessels, as it provides the necessary stability without compromising comfort and safety.

Values outside this range could indicate a vessel design that might not perform effectively against the various forces it encounters at sea, either being too unstable or uncomfortable to operate.