Which term is defined as the point at which all weight can be concentrated?

Which term is defined as the point at which all weight can be concentrated?

• A. Center of gravity: The point at which all weight can be concentrated
• B. Center of buoyancy: The center of the underwater hull
• C. Metacenter: The point about which rotation occurs
• D. Center of volume: The volume of the hull

Answer: (A)

Center of gravity is the point at which all weight can be considered to act. It is the weighted average location of every gravitational force on the ship, and in a uniform gravitational field it aligns with the body’s center of mass. This is different from center of buoyancy, which is where the buoyant force acts based on the submerged volume and changes with heel; the metacenter, the point about which rotation occurs during small heel angles, is used to assess stability; and center of volume is just the geometric center of the hull’s volume, not a weight-acting point. So, the term defined as the point where all weight can be concentrated is center of gravity. Lowering the CG generally improves stability and trim control.

Center of gravity is the point at which all weight can be considered to act. It is the weighted average location of every gravitational force on the ship, and in a uniform gravitational field it aligns with the body’s center of mass. This is different from center of buoyancy, which is where the buoyant force acts based on the submerged volume and changes with heel; the metacenter, the point about which rotation occurs during small heel angles, is used to assess stability; and center of volume is just the geometric center of the hull’s volume, not a weight-acting point. So, the term defined as the point where all weight can be concentrated is center of gravity. Lowering the CG generally improves stability and trim control.