Damaged stability is evaluated using the same measurements as intact stability—metacentric height, range of positive stability, and righting energy— but with water inside the hull. Anyone who’s stepped from the dock into a small open boat after a rainstorm knows what water in the hull can do to stability. It’s the same with a large yacht as with a small open boat, so the goal is to keep water out of the hull. Failing that, the addition of watertight bulkheads, creating multiple watertight compartments, can limit the amount of water. Containing the water in a smaller portion of the hull limits the adverse effects on stability and gives the bilge pumps a better chance to keep up with it. The more bulkheads and compartments the better, purely from the standpoint of stability, but those extra bulkheads can limit arrangement options and require more watertight doors, which gets expensive in a hurry.