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					 			      	The Submarine, How it Works - Submarine Diary
					 			      	 
 USS Birmingham - Surfacing in style Submarines are incredible pieces of technology. Not so long ago, a naval force worked entirely above the water; with the addition of the sÂubmarine to the standard naval arsenal, the world below the surface became a battleground as well. http://sundodgers.com/the-submariner/the-submarine-how-it-works/
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					 			      	The US Navy Submarines
					 			      	 
 Information about US Navy Ships, Past and Present. http://www.navy.mil/navydata/ships/subs/subs.asp
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					 			      	Nuclear Submarine Facts, Information, Pictures - Encyclopedia
					 			      	 
 A nuclear submarine is a ship powered by atomic energy that travels primarily under-water, but also on the surface of the ocean. Previously, conventional submarines used diesel engines that required air for moving on the surface of the water, and battery-powered electric motors for moving beneath it. http://www.encyclopedia.com/topic/Nuclear_Submarine.aspx
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					 			      	Maritime International - BAE Systems
					 			      	 
 We design and manufacture naval ships and submarines, as well as their combat systems and equipment. http://www.baesystems.com/en/our-company/our-businesses/maritime
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					 			      	UW A Local Company Building Innovative Deep-Sea Manned Submarine - UW Today
					 			      	 
 For the past 70 years, the University of Washington's Applied Physics Laboratory has conducted ocean research and engineering. Now they are teaming up with a local submersible company to build an innovative five-person submarine that would travel to almost 2 miles below the ocean's surface. http://www.washington.edu/news/2013/10/08/uw-local-company-building-innovative-deep-sea-manned-submarine/
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					 			      	Submarine: Development of the Modern Submarine - Infoplease
					 			      	 
 Development of the Modern Submarine  The first submarine used in combat  was invented in 1773 by David Bushnell, an American. http://www.infoplease.com/encyclopedia/history/submarine-development-modern-submarine.html
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					 			      	Diving and Surfacing, How Submarines Work - HowStuffWorks
					 			      	 
 Diving and Surfacing - Submarines are essentially containers that hold people and air. Learn how these remarkable vessels dive, surface and maneuver through the ocean. http://science.howstuffworks.com/transport/engines-equipment/submarine1.htm
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					 			      	Submarine History 1945-2000: A Timeline of Development
					 			      	 
 Illustrated submarine history from 1945-2000. http://www.submarine-history.com/NOVAfour.htm
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					 			      	Submarines - How do They Work?
					 			      	 
 An easy-to-understand look at submarines, with photos and artworks. What are they made from? How do they withstand water pressure at extreme depths? http://www.explainthatstuff.com/submarines.html
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					 			      	History and Design of Submarines - About
					 			      	 
 The evolution of submarine design from the submarine beginning as a compressed air or human powered warship to today's nuclear powered subs. http://inventors.about.com/od/sstartinventions/a/Submarines.htm
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					 			      	Fun Submarine Facts for Kids - History, Uses, Military, Navy, Interesting Trivia
					 			      	 
 Check out our fun submarine facts for kids and enjoy learning about their history. Find information on what submarines are used for, how long they can remain submerged, how many crew they typically have, when they were first developed and much more. http://www.sciencekids.co.nz/sciencefacts/vehicles/submarines.html
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					 			      	Submarine - Wikipedia, the free encyclopedia
					 			      	 
 A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed, autonomous vessel. https://en.wikipedia.org/wiki/Submarine