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A submarine is a specialized watercraft that can operate underwater. Submarines, first widely used in World War I, are used by all major navies today, especially the American, British, French and Russian navies. Civilian submarines and submersibles are used for marine and freshwater science and for work at depths too great for human divers.

Nuclear powered submarines and other large submarines are classed as ships, but are customarily referred to by their crews as "boats". The term U-Boat is sometimes used for German submarines in English. This comes from the German word for submarine, 'U-Boot', itself an abbreviation for Unterseeboot ('undersea boat').

Submarines encompass one of the largest ranges in capabilities of any vessel. They range from small two-man vessels that can examine the sea floor for a few hours to the Russian Typhoon class, which can remain submerged for half a year and carry enough nuclear missiles to destroy hundreds of cities. There are also specialized submarines such as rescue submarines (like the DSRV or Priz) and tiny one-person human powered subs intended for competitions between universities. An older device for use in underwater exploration, salvage, construction and rescue is the diving bell.

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Now Playing on Ambient Popsicle: The Submarines ''Ready Or Not'' (from Declare A New State)
groovera (Groovera) Mon, 07 Dec 2009 00:41:08 -0000
Now Playing on Ambient Popsicle: The Submarines ''Ready Or Not'' (from Declare A New State)
To find bands like The Submarines before they become hugely popular what should I be reading/following?
sriramvenkit (Sriram Venkitachalam) Mon, 07 Dec 2009 00:38:15 -0000
To find bands like The Submarines before they become hugely popular what should I be reading/following?
@tqbf You're putting words in my mouth. That said, I would definitely recommend that nuclear-armed submarines not run Microsoft Windows.
cperciva (cperciva) Sun, 06 Dec 2009 22:54:53 -0000
@tqbf You're putting words in my mouth. That said, I would definitely recommend that nuclear-armed submarines not run Microsoft Windows.
Diego-Garcia: Base pour des Guided-Missile Submarines - http://bit.ly/4xbTB2
carrotmadman6 (carrotmadman6) Sun, 06 Dec 2009 22:31:41 -0000
Diego-Garcia: Base pour des Guided-Missile Submarines - http://bit.ly/4xbTB2
Diego-Garcia: Base pour des Guided-Missile Submarines: Des développements majeurs sont à prévoir à la base mili... http://bit.ly/7rdizS
radiomoris (radiomoris) Sun, 06 Dec 2009 22:26:12 -0000
Diego-Garcia: Base pour des Guided-Missile Submarines: Des développements majeurs sont à prévoir à la base mili... http://bit.ly/7rdizS
Playingなう♪ One Of Our Submarines(Thomas Dolby Live Mix) : Thomas Dolby : One Of Our Submarines #TwitMusic 今日は風が強く寒い朝。そろそろマフラーしようかな。
xavier_nw (グザヴィエ) Sun, 06 Dec 2009 22:17:07 -0000
Playingなう♪ One Of Our Submarines(Thomas Dolby Live Mix) : Thomas Dolby : One Of Our Submarines #TwitMusic 今日は風が強く寒い朝。そろそろマフラーしようかな。

 
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Submarines on Eternal Patrol - Honoring those who made the ultimate sacrifice upon the altar of freedom.

Commander, Submarine Force U.S. Atlantic Fleet - Provides staff biographies, submarine force organization and history, fact files by ship type, and resources for COMNAVSUBFOR personnel.
Meta Description: [ Commander Naval Submarine Forces operates, maintains, trains and equips submarines around the world in support of the U.S. Navy's fleet and national tasking. The SubForce maintains combat ready nuclear-powered strategic deterrent and attack submarines. Ballistic missile submarines operate in int... ]

Commander, Submarine Force U.S. Pacific fleet - Offers news, history, resources and events for COMSUBPAC personnel, squadrons and submarine crews.

Commander, Submarine Group 9 - Features news, events, force structure, history, resources and a guestbook for CSG9 personnel aboard its 12 submarine crews based at Naval Submarine Base, Bangor.

How Photonics Masts Will Work - Illustrated article shows how the U.S. Navy's new subs will use photonics masts instead of periscopes.
Meta Description: [ The U.S. Navy's new subs will use photonics masts instead of periscopes. Learn how these imaging devices will work. ]

404 Naval Submarine School, Groton CT - Trains officers and enlisted sailors in the basic knowledge and skills upon which operational submarine commands can build competence and proficiency in operating and maintaining submarines and all their systems.

NAVIMFAC PACNORWEST - Trident Refit Facility - TRIDENT Refit Facility is an enhanced intermediate maintenance activity located at Naval Submarine Base, Bangor.

Ron's Submarine Covers - Worldwide submarines histories, covers, stamps, and insignia.

Submarine Department, NSWC Carderock Division - Total Ship Systems Directorate, Naval Surface Warfare Center, Carderock Division, Submarines Department/
Meta Description: [ The Total Ship Systems Directorate (Naval Surface Warfare Center, Carderock Division) is a diverse organization with work efforts that impact Navy surface ships and submarines, DoD's combatant craft, and Marine Corps Vehicles. Our technology areas include: systems engineering, naval architecture,... ]

Submarine Maintenance Engineering Planning and Procurement Activity - SUBMEPP offers information on the centralized life-cycle support for submarines and submersibles it provides. An independent tenant command located at Portsmouth Naval Shipyard, Portsmouth, New Hampshire.

Submarine Sailor - Shipmate registry, stories, humor, book and video list, tributes, reunion information, photos, and almanac of submarine history.

Subnet - CAUSS - Cyberspace Association of U.S. Submariners

The ThistleGroup - History of the Polaris Tartan and Subron 14 at Holy Loch, Scotland with pictures form 1962 to 1964.
Meta Description: [ ThistleGroup, is a Web Site that is diverse in many ways. ThistleGroup welcomes F4U Corsair links, and Web Page Authoring,, ThistleGroup, is a Web Site that is diverse in many ways. US Navy's SubRon 14 Holy Loch, Scotland History, F4U Corsair links,and Web Page Authoring by Jim Collins ]

Through The Looking Glass - Photo essay about United States Submarines from 1900-1940.
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Tubes Forward - Submarine Veterans Amateur Radio Association supporting all memorial submarines on public display.

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