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BookmarkA submarine is a specialized watercraft that can operate underwater.
Most major navies use submarines.
Submarines are also used for marine and freshwater science and for work at depths too great for human divers..
For more information about the topic Submarine, read the full article at Wikipedia.org, or see the following related articles:
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Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Submarine at Wikipedia.org. See the Wikipedia copyright page for more details.
