bathyalsonen
The bathysphere was a spherical diving vehicle used for deep-sea exploration. Invented by Otis Barton and developed with William Beebe, it was one of the earliest submersibles capable of reaching significant ocean depths. The bathysphere was lowered and raised by a cable from a surface vessel, and occupants viewed the underwater world through thick quartz windows.
The first manned descent in a bathysphere occurred in 1930, reaching a depth of 1,400 feet. Subsequent