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USS District Of Columbia (SSBN-826)
USS ''District of Columbia'' (SSBN-826) will be the lead boat of the United States Navy's ballistic missile submarines and the Navy's first vessel to be named for the District of Columbia. On 25 July 2016, U.S. Navy Secretary Ray Mabus announced that the new submarine would be named USS ''Columbia.'' The Navy already had a , an attack submarine commissioned in 1995, which was expected to retire before the missile submarine was commissioned. But after the Navy decided to prolong the attack sub's service, the new submarine's name was changed to avoid having two active vessels with the same name. On 3 June 2022, the Navy announced that the new submarine would be named USS ''District of Columbia''. In 2021, construction began on ''District of Columbia'' at General Dynamics' Electric Boat facility in Quonset Point, Rhode Island. A keel laying ceremony was held at the shipyard on 4 June 2022. Completion of ''District of Columbia'' is scheduled for 2030, followed by her entry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington, D
Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on Washington, D.C. * George Washington (1732–1799), the first president of the United States Washington may also refer to: Places England * Washington, Tyne and Wear, a town in the City of Sunderland metropolitan borough ** Washington Old Hall, ancestral home of the family of George Washington * Washington, West Sussex, a village and civil parish Greenland * Cape Washington, Greenland * Washington Land Philippines *New Washington, Aklan, a municipality *Washington, a barangay in Catarman, Northern Samar *Washington, a barangay in Escalante, Negros Occidental *Washington, a barangay in San Jacinto, Masbate *Washington, a barangay in Surigao City United States * Washington, Wisconsin (other) * Fort Washington (other) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congressional Research Service
The Congressional Research Service (CRS) is a public policy research institute of the United States Congress. Operating within the Library of Congress, it works primarily and directly for members of Congress and their committees and staff on a confidential, nonpartisan basis. CRS is sometimes known as Congress' think tank due to its broad mandate of providing research and analysis on all matters relevant to national policymaking. CRS has roughly 600 employees reflecting a wide variety of expertise and disciplines, including lawyers, economists, reference librarians, and scientists. In the 2016 fiscal year, it was appropriated a budget of roughly $106.9 million by Congress. CRS was founded during the height of the Progressive Era as part of a broader effort to professionalize the government by providing independent research and information to public officials. Its work was initially made available to the public, but between 1952 and 2018 was restricted only to members of Congr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service. From the middle decades of the 17th century, and through the 18th century, the Royal Navy vied with the Dutch Navy and later with the French Navy for maritime supremacy. From the mid 18th century, it was the world's most powerful navy until the Second World War. The Royal Navy played a key part in establishing and defending the British Empire, and four Imperial fortress colonies and a string of imperial bases and coaling stations secured the Royal Navy's ability to assert naval superiority globally. Owing to this historical prominence, it is common, even among non-Britons, to ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northrop Grumman
Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military technology providers. The firm ranks on the 2022 ''Fortune'' 500 list of America's largest corporations. Northrop Grumman and its industry partners have won the Collier Trophy eight times, most recently for developing the X-47B, the first unmanned, autonomous air system to operate from an aircraft carrier. Northrop Grumman currently leads the development of the B-21 Raider, a long-range, stealth strategic bomber that can drop conventional and nuclear weapons; it will replace Northrop's own B-2 Spirit, the world's only known stealth bomber. Among its other current projects are development and production of the James Webb Space Telescope, an orbiting observatory launched in 2021, and production of the solid rocket boosters for NASA's Space ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Government Accounting Office
The U.S. Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluative, and investigative services for the United States Congress. It is the supreme audit institution of the federal government of the United States. It identifies its core "mission values" as: accountability, integrity, and reliability. It is also known as the "congressional watchdog". Powers of GAO The work of the GAO is done at the request of congressional committees or subcommittees or is mandated by public laws or committee reports. It also undertakes research under the authority of the Comptroller General. It supports congressional oversight by: * auditing agency operations to determine whether federal funds are being spent efficiently and effectively; * investigating allegations of illegal and improper activities; * reporting on how well government programs and policies are meeting their objectives; * performing policy analyses and outlining options for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Signature
The term acoustic signature is used to describe a combination of acoustic emissions of sound emitters, such as those of ships and submarines. In addition, aircraft, machinery, and living animals can be described as having their own characteristic acoustic signatures or sound attributes, which can be used to study their condition, behavior, and physical location. Military use The analysis of acoustic signatures is an important adjunct to passive sonar used to track naval warships and weapons. Similar methods have been used to identify aircraft, especially before the development of sophisticated radar tracking. Sound characteristics The acoustic signature is made up of a number of individual elements. These include: *Machinery noise: noise generated by a ship's engines, propeller shafts, fuel pumps, air conditioning systems, etc. *Cavitation noise: noise generated by the creation of gas bubbles by the turning of a ship's propellers. *Hydrodynamic noise: noise generated by the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bloomberg L
Bloomberg may refer to: People * Daniel J. Bloomberg (1905–1984), audio engineer * Georgina Bloomberg (born 1983), professional equestrian * Michael Bloomberg (born 1942), American businessman and founder of Bloomberg L.P.; politician and mayor of New York City (2002–2013) * Ramon Bloomberg (born 1972), American artist and film director Other uses * Bloomberg L.P., financial news and media company founded by Michael Bloomberg ** Bloomberg News, a news agency ** ''Bloomberg Businessweek'', weekly business magazine and website ** ''Bloomberg Markets,'' a monthly financial magazine ** Bloomberg Radio, a business radio network ** Bloomberg Television, a business news channel ***Bloomberg TV Canada ***Bloomberg TV Philippines ***Bloomberg TV Malaysia ** Bloomberg Terminal, desktop terminal and software widely used in the financial industry ** Bloomberg Data, API product using sftp or web service protocols to retrieve market data ** Bloomberg Government, online news service c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arms Control Association
The Arms Control Association is a United States-based nonpartisan membership organization founded in 1971, with the self-stated mission of "promoting public understanding of and support for effective arms control policies." The group publishes the monthly magazine ''Arms Control Today''. It contains topical news updates as well as extended, footnoted articles. Projects Through its online content, print materials, and events, the Arms Control Association provides policymakers, media, and the interested public with information, analysis and commentary on arms control proposals, negotiations and agreements, and related national security issues. Staff and funding The Arms Control Association is supported by grants from the Ploughshares Fund, the John D. and Catherine T. MacArthur Foundation, the Carnegie Corporation of New York, the Colombe Foundation, the New Land Foundation, the Prospect Hill Foundation], the Stewart R. Mott Foundation, and the William and Flora Hewlett Foundation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Refueling
The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the ''front end'', which are the preparation of the fuel, steps in the ''service period'' in which the fuel is used during reactor operation, and steps in the ''back end'', which are necessary to safely manage, contain, and either reprocess or dispose of spent nuclear fuel. If spent fuel is not reprocessed, the fuel cycle is referred to as an ''open fuel cycle'' (or a ''once-through fuel cycle''); if the spent fuel is reprocessed, it is referred to as a ''closed fuel cycle''. Basic concepts Nuclear power relies on fissionable material that can sustain a chain reaction with neutrons. Examples of such materials include uranium and plutonium. Most nuclear reactors use a moderator to lower the kinetic energy of the neutrons and increase the probability that fission will occur. This allows reactors to use material with far low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGM-133 Trident II
The UGM-133A Trident II, or Trident D5 is a submarine-launched ballistic missile (SLBM), built by Lockheed Martin Space in Sunnyvale, California, and deployed with the US Navy, American and Royal Navy, British navies. It was first deployed in March 1990, and remains in service. The Trident II Strategic Weapons System is an improved SLBM with greater accuracy, payload, and range than the earlier UGM-96 Trident I, Trident C-4. It is a key element of the U.S. strategic nuclear triad and strengthens U.S. deterrence theory, strategic deterrence. The Trident II is considered to be a durable sea-based system capable of engaging many targets. It has payload flexibility that can accommodate various treaty requirements, such as New START. The Trident II's increased payload allows nuclear deterrence to be accomplished with fewer submarines, and its high accuracy—approaching that of intercontinental ballistic missile, land-based missiles—enables it to be used as a pre-emptive nuclear str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newport News Shipbuilding
Newport News Shipbuilding (NNS), a division of Huntington Ingalls Industries, is the largest industrial employer in Virginia, and sole designer, builder and refueler of United States Navy aircraft carriers and one of two providers of U.S. Navy submarines. 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, its facilities span more than , strategically positioned in one of the great harbors of the East Coast. 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 the s and . In 2013, Newport News Shipbuilding began the deactivation of the first nuclear-powered aircraft carrier, , which it also built. Newport Ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Boat
An electric boat is a powered watercraft driven by electric motors, which are powered by either on-board battery packs, solar panels or generators. While a significant majority of water vessels are powered by diesel engines, with sail power and gasoline engines also popular, boats powered by electricity have been used for over 120 years. Electric boats were very popular from the 1880s until the 1920s, when the internal combustion engine became dominant. Since the energy crises of the 1970s, interest in this quiet and potentially renewable marine energy source has been increasing steadily, especially as more efficient solar cells have become available, for the first time making possible motorboats with a theoretically infinite cruise range like sailboats. The first practical solar boat was probably constructed in 1975 in England. The first electric sailboat to complete a round-the-world tour (including a transit of the Panama Canal) using only green technologies is EcoSail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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