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USS Chicago (SSN-721) is a Los Angeles-class submarine, the fourth ship of the United States Navy to be named for the city of Chicago, Illinois.The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 13 August 1981 and her keel was laid down on 5 January 1983.
A 16th-century Islamic painting depicting Alexander the Great being lowered in a glass submersible. The concept of underwater transport has roots deep in antiquity. There are images of men using hollow sticks to breathe underwater for hunting at the temples at Thebes, and the first known military use occurred during the siege of Syracuse (415–413 BC), where divers cleared obstructions ...
There are three major types of submarines in the United States Navy: ballistic missile submarines, attack submarines, and cruise missile submarines. All submarines currently in the U.S. Navy are nuclear-powered. Ballistic missile submarines have a single strategic mission of carrying nuclear submarine-launched ballistic missiles.
Last conventionally powered submarine built for the US Navy. Laid after Blueback but launched and commissioned before SSN-583 Sargo: SSN-584 Seadragon: First submarine to complete a submerged circumnavigation of the Northwest Passage. SSN-585 Skipjack: Lead boat of a class of 6. First nuclear powered submarine with a teardrop hull. SSRN-586 Triton
Prototype "fleet submarines"—submarines fast enough (21 knots (11 m/s)) to travel with battleships. Twice the size of any concurrent or past U.S. submarine. A poor tandem engine design caused the boats to be decommissioned by 1923 and scrapped in 1930.
Development began in 1958, with the technical evaluation being completed in 1963. SUBROC reached Initial Operation Capability (IOC) aboard the attack submarine Permit in 1964. [ 5 ] [ 6 ] When SUBROC reached IOC, the US Navy's admiral in charge of weapons procurement stated that SUBROC was "…a more difficult technical problem than Polaris ."
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USS Chicago (CA-29) was a Northampton-class heavy cruiser commissioned in 1931 and active in World War II, until lost at the Battle of Rennell Island in January 1943. USS Chicago (CA-136) was a Baltimore-class heavy cruiser, commissioned in 1945; later converted to an Albany-class guided missile cruiser and redesignated CG-11, then struck in 1984.