178. You are providing onboard training to your engineers on the factors affecting trim and stability. What instructions do you give your engineers to stabilize the ship should it experience an unstable rolling behavior?

Adding ballast to a centerline double bottom tank lowers the ship's center of gravity and increases stability, which reduces excessive rolling. This is achieved by lowering the center of gravity without creating list, thereby improving transverse stability. Other options either worsen the list, affect trim instead of stability, or reduce stability by raising the center of gravity.