Bathysphere
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
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