Changes

The Roll roll moment of inertia defines the amount of torque (think wave pressure) required to rotate a mass (think roll the boat).<ref>https://en.wikipedia.org/wiki/Roll_moment</ref> Increasing inertia (reducing rolling) is accomplished by spreading out weight aboard rather than having it highly concentrated. Because of the leverage or gyroscopic effect, weight at the perimeter of the boat will have a much higher resistance to changes in motion, increasing dynamic stability.<ref>http://www.kastenmarine.com/beam_vs_ballast.htm</ref>