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The Los Angeles class of submarines are nuclear-powered fast attack submarines in service with the United States Navy. Also known as the 688 class (pronounced "six-eighty-eight") after the hull number of lead vessel USS Los Angeles (SSN-688) , 62 were built from 1972 to 1996, the latter 23 to an improved 688i standard.
Ships in that size range can carry between 2.5 million and 3.5 million gallons of fuel. The amount of fuel actually be used on a sailing depends primarily on the ship's speed.
The third USS Los Angeles (CA-135) was a Baltimore-class heavy cruiser, laid down by the Philadelphia Navy Yard, Philadelphia, on 28 July 1943 and launched on 20 August 1944. She was sponsored by Mrs. Fletcher Bowron and commissioned on 22 July 1945, with Captain John A. Snackenberg in command.
USS Los Angeles (SSN-688), lead ship of her class of submarines, was the fourth ship of the United States Navy to be named for Los Angeles, California. The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 8 January 1971 and her keel was laid down on 8 January 1972.
The Builder's Old Measurement formula remained in effect until the advent of steam propulsion. Steamships required a different method of estimating tonnage, because the ratio of length to beam was larger and a significant volume of internal space was used for boilers and machinery. In 1849, the Moorsom System was created in the United Kingdom ...
A conical measure is a type of laboratory glassware which consists of a conical cup with a notch on the top to allow for the easy pouring of liquids, and graduated markings on the side to allow easy and accurate measurement of volumes of liquid. They may be made of plastic, glass, or borosilicate glass. The use of the conical measure usually ...
Both the conical plate centrifuge and chamber bowl centrifuge can be used for liquid/liquid and solid/liquid separation. However, the advantage of conical plate centrifuge over chamber bowl centrifuge is that solid discharge is possible in conical plate. The chamber bowl has a high capacity for solids but there is no solid discharge.
Seawolf-class submarines are larger, faster, and significantly quieter than previous Los Angeles-class submarines; they also carry more weapons and have twice as many torpedo tubes. The boats are able to carry up to 50 UGM-109 Tomahawk cruise missiles for attacking land and sea surface targets.