Which two points are necessary to determine the maximum righting arm value?

To determine the maximum righting arm value, it's essential to have information about the center of gravity (G) and the center of buoyancy (B). The righting arm is the horizontal distance between the center of gravity and the center of buoyancy when a vessel is heeled over.

G represents the center of gravity, which indicates the balance point of the vessel where its weight is considered to act. The center of buoyancy, denoted by B, is where the buoyant force acts when the vessel is floating in water. When the vessel heels, the center of buoyancy shifts, and the righting arm can be calculated based on how these two points interact.

By understanding the positions of G and B, you can calculate the righting arm at various angles of heel and identify the angle at which the maximum righting arm occurs. This is crucial for stability analysis as it helps determine how well a vessel can recover from a heeled position. The correct combination of G and B is therefore foundational for assessing stability and optimal design in naval architecture.