what is ballast stone
Ship's Ballast. River cobbles of all different shapes were stored in the ship's hold to enhance stability. Wooden sailing vessels were inherently buoyant, and tall masts made them extremely top-heavy. Ballast stones were added or removed as the weight of cargo, supplies, or ordinance changed. Anchors and extra cannon were also sometimes used as ballast. Click the images below to learn about the different types of ballast stones that have been recovered thus far.