The first military submarine was designed to sabotage enemy shipping, and underwater designs for the next century.

Capt. Joe Meier spoke for everyone in attendance in Kittery, Maine, on Saturday at a ceremony marking the 62nd anniversary of ...

De Son meant for his almost-submarine—a semi-submerged ram ... (displacement), but he illustrated a totally impractical ballast system in which an operator would increase the boat's weight ...

It also had a streamlined hull for easier underwater travel, a conning tower, separate main and auxiliary ballast systems, and a tube for launching torpedoes. Submarines would get bigger ...