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submersible
A submersible is a small vehicle designed to operate underwater. The term submersible is often used to differentiate from other underwater vehicles known as submarines, in that a submarine is a fully autonomous craft, capable of renewing its own power and breathing air, whereas a submersible is usually supported by a surface vessel, platform, shore team or sometimes a larger submarine. In common usage by the general public, however, the word submarine may be used to describe a craft that is by the technical definition actually a submersible. There are many types of submersibles, including both crewed and uncrewed craft, otherwise known as remotely operated vehicles or ROVs.〔The Canadian Encyclopedia. 2011. http://www.thecanadianencyclopedia.com/index.cfm?PgNm=TCE&Params=A1ARTA000776〕 Submersibles have many uses worldwide, such as oceanography, underwater archaeology, ocean exploration, adventure, equipment maintenance/recovery or underwater videography.〔Ocean Outpost: The Future of Humans Living Underwater, by Erik Seedhouse. 2010. http://books.google.ca/books?id=eU4wsg-QCxsC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false〕
==Operation==
Apart from size, the main technical difference between a "submersible" and a "submarine" is that submersibles are not fully autonomous and may rely on a support facility or vessel for replenishment of power and breathing gases. Submersibles typically have shorter range, and operate primarily underwater, as most have little function at the surface. Some submersibles operate on a "tether" or "umbilical", remaining connected to a tender (a submarine, surface vessel or platform). Submersibles have been able to dive to over 10 km (6 mi) below the surface.
Submersibles may be relatively small, hold only a small crew, and have no living facilities.
A submersible often has very dexterous mobility, provided by propeller screws or pump-jets.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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