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Nimitz Class Aircraft Carrier
The ''Nimitz'' class is a class of ten nuclear-powered aircraft carriers in service with the United States Navy. The lead ship of the class is named after World War II United States Pacific Fleet commander Fleet Admiral Chester W. Nimitz, who was the last living U.S. Navy officer to hold the rank. With an overall length of and a full-load displacement of over , the ''Nimitz''-class ships were the largest warships built and in service until entered the fleet in 2017. Instead of the gas turbines or diesel–electric systems used for propulsion on many modern warships, the carriers use two A4W pressurized water reactors. The reactors produce steam to drive steam turbines which drive four propeller shafts and can produce a maximum speed of over and a maximum power of around . As a result of nuclear power, the ships are capable of operating for over 20 years without refueling and are predicted to have a service life of over 50 years. They are categorized as nuclear-powered air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria, British Columbia
Victoria is the capital city of the Provinces and territories of Canada, Canadian province of British Columbia, on the southern tip of Vancouver Island off Canada's Pacific Ocean, Pacific coast. The city has a population of 91,867, and the Greater Victoria area has a population of 397,237. The city of Victoria is the seventh most densely populated city in Canada with . Victoria is the southernmost major city in Western Canada and is about southwest from British Columbia's largest city of Vancouver on the mainland. The city is about from Seattle by airplane, Harbour Air Seaplanes, seaplane, ferry, or the Clipper Navigation, Victoria Clipper passenger-only ferry, and from Port Angeles, Washington, Port Angeles, Washington (state), Washington, by ferry across the Strait of Juan de Fuca. Named for Queen Victoria, the city is one of the oldest in the Pacific Northwest, with British settlement beginning in 1843. The city has retained a large number of its historic buildings, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Pacific Fleet
The United States Pacific Fleet (USPACFLT) is a theater-level component command of the United States Navy, located in the Pacific Ocean. It provides naval forces to the Indo-Pacific Command. Fleet headquarters is at Joint Base Pearl Harbor–Hickam, Hawaii, with large secondary facilities at Naval Air Station North Island, California. Origins A Pacific Fleet was created in 1907 when the Asiatic Squadron and the Pacific Squadron were combined. In 1910, the ships of the First Squadron were organized back into a separate Asiatic Fleet. The General Order 94 of 6 December 1922 organized the United States Fleet, with the Battle Force as the Pacific presence. Until May 1940, the Battle Force was stationed on the West Coast of the United States. Headquarters, battleships, aircraft carriers and heavy cruisers were stationed at San Pedro close to the Long Beach Naval Shipyard. Light cruisers, destroyers and submarines were stationed at San Diego. During the summer of 1940, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Eagle Claw
Operation Eagle Claw ( Persian: عملیات پنجه عقاب) was a failed U.S. Department of Defense attempt to rescue 52 embassy staff held captive by Revolutionary Iran on 24 April 1980. It was ordered by US President Jimmy Carter after the staff were seized at the Embassy of the United States, Tehran. The operation, one of Delta Force's first, encountered many obstacles and failures and was subsequently aborted. Eight helicopters were sent to the first staging area called ''Desert One'', but only five arrived in operational condition. One had encountered hydraulic problems, another was caught in a sand storm, and the third showed signs of a cracked rotor blade. During the operational planning, it was decided that the mission would be aborted if fewer than six helicopters remained operational upon arrival at the Desert One site, despite only four being absolutely necessary. In a move that is still discussed in military circles, the field commanders advised President Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Commissioning
Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship in active duty with its country's military forces. The ceremonies involved are often rooted in centuries-old naval tradition. Ship naming and launching endow a ship hull with her identity, but many milestones remain before it is completed and considered ready to be designated a commissioned ship. The engineering plant, weapon and Electronics, electronic systems, Galley (kitchen), galley, and other equipment required to transform the new hull into an operating and habitable warship are installed and tested. The prospective commanding officer, ship's officers, the petty officers, and seamen who will form the crew report for training and familiarization with their new ship. Before commissioning, the new ship undergoes sea trials to identify a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virginia
Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States, Atlantic Coast and the Appalachian Mountains. The state's List of capitals in the United States, capital is Richmond, Virginia, Richmond and its most populous city is Virginia Beach, Virginia, Virginia Beach. Its most populous subdivision is Fairfax County, Virginia, Fairfax County, part of Northern Virginia, where slightly over a third of Virginia's population of more than 8.8million live. Eastern Virginia is part of the Atlantic Plain, and the Middle Peninsula forms the mouth of the Chesapeake Bay. Central Virginia lies predominantly in the Piedmont (United States), Piedmont, the foothill region of the Blue Ridge Mountains, which cross the western and southwestern parts of the state. The fertile Shenandoah Valley fosters the state's mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northrop Grumman Newport News
Newport News Shipbuilding (NNS), a division of Huntington Ingalls Industries, is the sole designer, builder, and refueler of aircraft carriers and one of two providers of submarines for the United States Navy. Founded as the Chesapeake Dry Dock and Construction Co. in 1886, Newport News Shipbuilding has built more than 800 ships, including both naval and commercial ships. Located in the city of Newport News, Virginia, its facilities span more than . The shipyard is a major employer, not only for the lower Virginia Peninsula, but also portions of Hampton Roads south of the James River and the harbor, portions of the Middle Peninsula region, and even some northeastern counties of North Carolina. The shipyard is building two s: , and . In 2013, Newport News Shipbuilding began the deactivation of the first nuclear-powered aircraft carrier, , which it also built. Newport News Shipbuilding also performs refueling and complex overhaul (RCOH) work on s. This is a four-year vessel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear-power
Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by nuclear ''fission'' of uranium and plutonium in nuclear power plants. Nuclear ''decay'' processes are used in niche applications such as radioisotope thermoelectric generators in some space probes such as ''Voyager 2''. Reactors producing controlled fusion power, ''fusion'' power have been operated since 1958 but have yet to generate net power and are not expected to be commercially available in the near future. The first nuclear power plant was built in the 1950s. The global installed nuclear capacity grew to 100GW in the late 1970s, and then expanded during the 1980s, reaching 300GW by 1990. The 1979 Three Mile Island accident in the United States and the 1986 Chernobyl disaster in the Soviet Union resulted in increased regulation and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hull Classification Symbol
The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration (NOAA) use a hull classification symbol (sometimes called hull code or hull number) to identify their ships by type and by individual ship within a type. The system is analogous to the pennant number system that the Royal Navy and other European and Commonwealth of Nations, Commonwealth navies use. History United States Navy The U.S. Navy began to assign unique Naval Registry Identification Numbers to its ships in the 1890s. The system was a simple one in which each ship received a number which was appended to its ship type, fully spelled out, and added parenthetically after the ship's name when deemed necessary to avoid confusion between ships. Under this system, for example, the battleship USS Indiana (BB-1), ''Indiana'' was USS ''Indiana'' (Battleship No. 1), the cruiser USS Olympia (C-6), ''Olympia'' was USS ''Olympia'' (Cruiser No. 6), and so on. Beginn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hull Number
A hull number is a serial identification number given to a boat or ship. For the military, a lower number implies an older vessel. For civilian use, the Hull Identification Number (HIN) is used to trace the boat's history. The precise usage varies by country and type. United States usage Civilian use For civilian craft manufactured in the United States, the hull number is given to the vessel when it is built and forms part of the hull identification number, which uniquely identifies the vessel and must be permanently affixed to the hull in at least two places. A Hull Identification Number (HIN) is a unique set of 12 characters, similar to the Vehicle Identification Number which is found on automobiles. In 1972, The United States Coast Guard was asked to create a standardized format for HINs to allow for better tracking of accidents and history of boats. This HIN format is as follows: The first three characters consist of the Manufacturers Index Code (MIC) and should only be lette ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressurized Water Reactor
A pressurized water reactor (PWR) is a type of light-water nuclear reactor. PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being the UK, Japan, India and Canada). In a PWR, water is used both as a neutron moderator and as coolant fluid for the reactor core. In the core, water is heated by the energy released by the fission of atoms contained in the fuel. Using very high pressure (around 155 bar: 2250 psi) ensures that the water stays in a liquid state. The heated water then flows to a steam generator, where it transfers its thermal energy to the water of a secondary cycle kept at a lower pressure which allows it to vaporize. The resulting steam then drives steam turbines linked to an electric generator. A boiling water reactor (BWR) by contrast does not maintain such a high pressure in the primary cycle and the water thus vaporizes inside of the reactor pressure vessel (RPV) before being sent to the turbine. Most PWR designs ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A4W Reactor
The A4W reactor is a United States Naval reactor, naval reactor used by the United States Navy to Nuclear marine propulsion, propel warships and electricity generation, generate onboard electricity. The A4W designation stands for: * A = Aircraft carrier platform * 4 = Contractor's fourth Nuclear reactor core, core design generation * W = Westinghouse, the contracted designer History These nuclear fission pressurized water reactors (PWRs) were jointly designed by Bettis Atomic Power Laboratory and Knolls Atomic Power Laboratory and built by Westinghouse Electric Company. Their Nuclear reactor core, reactor cores are expected to operate for about 25 years before refueling is required. The only ships to use these nuclear reactors are the Nimitz class aircraft carrier, ''Nimitz''-class supercarriers, which have two reactors rated at 550 MWth each. These Steam generator (nuclear power), generate enough steam to produce 140,000 Horsepower#Shaft horsepower, shaft horsepower (104 MW) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel–electric Powertrain
A diesel–electric transmission, or diesel–electric powertrain, is a transmission (mechanics), transmission system powered by diesel engines for vehicles in #Road and other land vehicles, road, #Railway locomotives, rail, and #Ships, marine transport. Diesel–electric transmission is similar to petrol–electric transmission, which is powered by petrol engines. Diesel–electric transmission is used on railways by Diesel locomotive#Diesel–electric, diesel–electric locomotives and Diesel multiple unit#Diesel–electric, diesel–electric multiple units, as electric motors are able to supply full torque from 0 revolutions per minute, RPM. Diesel–electric systems are also used in marine transport, including submarines, and on some other land vehicles. Description The defining characteristic of diesel–electric transmission is that it avoids the need for a gearbox, by converting the mechanical force of the diesel engine into electrical energy (through an alternator), and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
