6867175 Turtle (also called American Turtle), the world\'s first submersible vessel, showing the elevation, top, and the cross section, bottom. Constructed in 1775 by American David Bushnell as a means of attaching explosive charges to ships in a harbor, it was used during the American Revolutionary War. From Bibliotheque Des Merveilles, published 1888 (b/w engraving); (add.info.: Turtle (also called American Turtle), the world\'s first submersible vessel, showing the elevation, top, and the cross section, bottom. Constructed in 1775 by American David Bushnell as a means of attaching explosive charges to ships in a harbor, it was used during the American Revolutionary War. From Bibliotheque Des Merveilles, published 1888.); Photo 穢 Ken Welsh. All rights reserved 2022.