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Quiet Electric Drive
Quiet Electric Drive (QED)—sometimes called by the misnomer Quiet Electronic Drive—is an Office of Naval Research (ONR)-sponsored program to develop technologies for silent maritime propulsion for the United States Navy. According to the ONR, QED's role is to "address the Navy's operational gaps in surface ship and submarine maneuverability and acoustic signature. Quiet Electric Drives, or QEDs, are quiet, efficient and power dense. The primary objective of QED is demonstrating the utility of the motor as an actuator to obtain signature reduction performance while increasing tactical speed and maneuverability". Its existence is known particularly via a 2005 court case in which five ethnic Chinese suspects have been accused of attempting to smuggle data from a U.S. defense contractor. An FBI affidavit stated QED to be "an extremely sensitive project ... considered by the Navy to be significant military equipment and therefore banned for export to countries specifically denied ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office Of Naval Research (ONR)
The Office of Naval Research (ONR) is an organization within the United States Department of the Navy responsible for the science and technology programs of the U.S. Navy and Marine Corps. Established by Congress in 1946, its mission is to plan, foster, and encourage scientific research to maintain future naval power and preserve national security. It carries this out through funding and collaboration with schools, universities, government laboratories, nonprofit organizations, and for-profit organizations, and overseeing the Naval Research Laboratory, the corporate research laboratory for the Navy and Marine Corps. NRL conducts a broad program of scientific research, technology and advanced development. ONR Headquarters is in the Ballston neighborhood of Arlington, Virginia. ONR Global has offices overseas in Santiago, Sao Paulo, London, Prague, Singapore, and Tokyo. Overview ONR was authorized by an Act of Congress, Public Law 588, and subsequently approved by Preside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...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] |
Tactical Speed
Tactical speed is the highest speed of a submarine at which the boat is quiet enough for detecting other ships. Tactical speed is limited by the acoustic noise generated by the ship itself, which affects the ability to detect external sources of sound. One of the main contributors to internal sources of noise is the propulsion system. Tactical speed for modern submarines with nuclear propulsion is at the level of 8–13 knot A knot is an intentional complication in cordage which may be practical or decorative, or both. Practical knots are classified by function, including hitches, bends, loop knots, and splices: a ''hitch'' fastens a rope to another object; a ' ...s, but the newest ships of IV generation can achieve tactical speeds over 20 knots. The actual maximum speed of a submarine can be much greater than its tactical speed. For instance, the maximum speed (when submerged) of USS Scranton (SSN-756) is 33 knots, whereas its tactical speed is only 12 knots. Referenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Bureau Of Investigation
The Federal Bureau of Investigation (FBI) is the domestic intelligence and security service of the United States and its principal federal law enforcement agency. Operating under the jurisdiction of the United States Department of Justice, the FBI is also a member of the U.S. Intelligence Community and reports to both the Attorney General and the Director of National Intelligence. A leading U.S. counterterrorism, counterintelligence, and criminal investigative organization, the FBI has jurisdiction over violations of more than 200 categories of federal crimes. Although many of the FBI's functions are unique, its activities in support of national security are comparable to those of the British MI5 and NCA; the New Zealand GCSB and the Russian FSB. Unlike the Central Intelligence Agency (CIA), which has no law enforcement authority and is focused on intelligence collection abroad, the FBI is primarily a domestic agency, maintaining 56 field offices in major cities throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Affidavit
An ( ; Medieval Latin for "he has declared under oath") is a written statement voluntarily made by an ''affiant'' or '' deponent'' under an oath or affirmation which is administered by a person who is authorized to do so by law. Such a statement is witnessed as to the authenticity of the affiant's signature by a taker of oaths, such as a notary public or commissioner of oaths. An affidavit is a type of verified statement or showing, or in other words, it contains a verification, which means that it is made under oath on penalty of perjury, and this serves as evidence for its veracity and is required in court proceedings. Definition An affidavit is typically defined as a written declaration or statement that is sworn or affirmed before a person who has authority to administer an oath. There is no general defined form for an affidavit, although for some proceedings an affidavit must satisfy legal or statutory requirements in order to be considered. An affidavit may include, * a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of State
The United States Department of State (DOS), or State Department, is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs of other nations, its primary duties are advising the U.S. president on international relations, administering diplomatic missions, negotiating international treaties and agreements, and representing the United States at the United Nations conference. Established in 1789 as the first administrative arm of the U.S. executive branch, the State Department is considered among the most powerful and prestigious executive agencies. It is headed by the secretary of state, who reports directly to the U.S. president and is a member of the Cabinet. Analogous to a foreign minister, the secretary of state serves as the federal government's chief diplomat and representative abroad, and is the first Cabinet official in the order of precedence and in the pres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chi Mak
Chi Mak (; born 28 September 1940) was a Chinese-born naturalized American citizen who worked as an engineer for California-based defense contractor Power Paragon, a part of L-3 Communications. In 2007, Mak was found guilty of conspiring to export sensitive defense technology to China. He was not formally charged with espionage as the information was not officially classified. Mak's legal defense was that he thought there was nothing improper about leaving the U.S. with a CD carrying his own published work on U.S. defense technology, despite his training from his employer indicating quite the opposite. He had intentionally released it without his employer's permission at a 2004 international engineering conference. He had been briefed every year on regulations regarding documents designated "For Official Use Only" (FOUO) and items restricted by export controls. His defense argued that making the data accessible to scrutiny by the general public negated its military value and made i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetohydrodynamic Drive
A magnetohydrodynamic drive or MHD accelerator is a method for propelling vehicles using only electric and magnetic fields with no moving parts, accelerating an electrically conductive propellant ( liquid or gas) with magnetohydrodynamics. The fluid is directed to the rear and as a reaction, the vehicle accelerates forward. The first studies examining MHD in the field of marine propulsion date back to the early 1960s. Few large-scale working prototypes have been built, as marine MHD propulsion remains impractical due to its low efficiency, limited by the low electrical conductivity of seawater. Increasing current density is limited by Joule heating and water electrolysis in the vicinity of electrodes, and increasing the magnetic field strength is limited by the cost, size and weight (as well as technological limitations) of electromagnets and the power available to feed them. Stronger technical limitations apply to air-breathing MHD propulsion (where ambient air is ioniz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equipment Of The United States Navy
The equipment of the United States Navy have been subdivided into: watercraft, aircraft, munitions, vehicles, and small arms. Surface ships Commissioned surface ships and submarines (arranged by class and displacement) Small boats Submarines Aircraft Munitions Land vehicles In addition to the vehicles listed here, the Navy Seabees operate a number of unlisted trucks and construction vehicles. Small arms Individual equipment See also * Equipment of the United States Armed Forces * Equipment of the United States Air Force * Equipment of the United States Army * Equipment of the United States Coast Guard * Equipment of the United States Marine Corps **List of weapons of the United States Marine Corps * List of active United States military aircraft References {{US Navy navbox Equipment United States Navy Navy A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval warfare, naval and amphibious ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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