See: Submarine
See also: Diving Vessel

Designed by Auguste Piccard. This vessel began construction in 1946. After years of tests and re-builds, the Navy caught on. In 1960, Jacques Piccard and Don Walsh descended to 10,916 m (35,810 feet) in the Mariana Trench.

The vessel is a two chambered construction. Area for sailors and fuel storage, or ballasts. Its basic construction is still in use today, but the technology involved is much more complex.

See also: bathysphere