A bathysphere is a spherical deep-sea diving submersible which is lowered into bodies of water with a cable. Bathyspheres have a variety of uses, usually including the study of underwater life.

At extreme depths, the cable becomes unmanageable. Deeper dives must be performed by self-propelled vehicles such as the bathyscaphe.

The term bathysphere is composed from the greek words βάθος (bathys), "depth" og σφαίρα (sphaira), "sphere".

See also

• Timeline of underwater technology
• Diving bell

External links

• An article about deep sea explorer William Beebe