In terms of vessel stability, what impact does an increased G have?

An increased center of gravity (G) in a vessel generally has the effect of enhancing the righting moment at all inclinations, which means that the vessel will experience a greater tendency to return to an upright position as it heals over. This is because a higher center of gravity raises the height at which the weight acts, influencing the lever arm created between the center of buoyancy (B) and the center of gravity (G).

When a vessel heels, the center of buoyancy shifts, creating a righting moment against the vessel's heeling. If the center of gravity is raised, the righting arm increases, leading to increased righting forces as the vessel continues to tilt. This is particularly important in maintaining stability throughout the different ranges of inclination the vessel might experience during its operations. It contributes to both the initial stability (when the vessel is close to upright) and the overall stability during larger angles of heel.

In summary, an increased G enhances the righting moment, providing safer operational conditions and reducing the risk of capsize due to increased stability across a broader range of inclinations.