What does a high metacentric height (GM) indicate?

A high metacentric height (GM) signifies greater stability for a vessel. This measurement represents the distance between the center of gravity (G) and the metacenter (M), and it serves as a crucial indicator in determining a ship's ability to return to an upright position after being tilted by external forces, such as wind or waves. A larger GM value implies that the vessel has a greater righting moment, which enables it to recover more effectively from heeling.

When GM is high, the center of buoyancy (B) will work together with the center of gravity to create a robust restoring force that helps to stabilize the vessel. Consequently, it allows the ship to resist capsizing and maintain better performance in rough conditions. This characteristic is vital for ensuring safety and seaworthiness, particularly for vessels operating in challenging environments or carrying heavy loads.

While the other options may touch on various aspects of a vessel’s design, they do not accurately describe the implications of a high metacentric height in terms of stability. Therefore, the association of GM with enhanced stability is critical for understanding naval architecture and marine engineering principles.