an American inventor, a patriot, a scholar, and a veteran of the Revolutionary War. He had invented the first submarine to be used in battle. Bushnell is credited with creating the first submarine ever used in combat, while studying at Yale in 1775. He called it Turtle because of its look in the water. His idea of using water as ballast for submerging and raising his submarine is still in use, as is the screw propeller, which was used in Turtle.
