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Surveillance Towed Array Sensor System
The AN/UQQ-2 Surveillance Towed Array Sensor System (SURTASS), colloquially referred to as the ship's "Tail", is a towed array sonar system of the United States Navy. SURTASS Twin-Line consists of either the long passive SURTASS array or the Twin-line array consisting of two shorter passive arrays towed side by side. The Twin-line Engineering Development Model was installed on USNS ''Assertive'', and the first production model was installed on USNS ''Bold''. Both ships are no longer serving as SURTASS units. , SURTASS was deployed on the four ''Victorious''-class vessels and the (a small-waterplane-area twin hull (SWATH) vessel). History SURTASS began as development program in 1973 using the new research vessel ''Moana Wave''. In 1980 SURTASS passed OPEVAL. The new ''Stalwart''-class ocean surveillance ships had the first contract awarded on 26 September 1980 and were similar to the prototype ship, the ''Moana Wave''. Initially the SURTASS system were passive, receive only s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USNS Invincible (T-AGOS 10) SURTASS Gear
USNS ''Invincible'' (T-AGM-24), also known as ex-''AGOS 10'', is one of two tracking ships operated by the Military Sealift Command. One of the radars it carries is the Cobra Gemini dual band, X band and S band, radar. Like other members of the ''Stalwart'' class of ocean surveillance ships, the original mission of the ''Invincible'' was to patrol the oceans looking for submarines with her Surveillance Towed Array Sensor System (SURTASS), a large passive sonar array. The ship was reclassified from AGOS-10 to AGM-24 on April 4, 2000 after she was refitted as a missile range instrumentation ship. ''Invincible'' provides a platform for the Cobra Gemini dual-band radar developed by the United States Air Force to support data collection requirements on theater ballistic missiles. The Military Sealift Command retains custody for United States Air Force use for deploying a mobile surveillance and tracking radar system. History ''Invincible'' deployed to the Persian Gulf in 2012, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Project Artemis
Project Artemis was a United States Navy acoustics research and development experiment from the late 1950s into the mid 1960s to test a potential low-frequency active sonar system for ocean surveillance. The at sea testing began in 1960 after research and development in the late 1950s. The project's test requirement was to prove detection of a submerged submarine at . The experiment, covering a number of years, involved a large active element and a massive receiver array. The receiving array was a field of modules forming a three dimensional array laid from 1961 to 1963 on the slopes of a seamount, the Plantagenet Bank (), off Bermuda. The modules, attached to ten lines of cable, were masts with floats on top to keep them upright. Each module mounted sets of hydrophones. The receiving array terminated at Argus Island, built on the seamount's top, with data processed at the laboratory that was also constructed for the project. The laboratory was then the Naval Facility Bermuda#Tud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Sonar Equipment Of The United States
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform. It may consist of one or more military branches such as an army, navy, air force, space force, marines, or coast guard. The main task of the military is usually defined as defence of the state and its interests against external armed threats. In broad usage, the terms ''armed forces'' and ''military'' are often treated as synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include both its military and other paramilitary forces. There are various forms of irregular military forces, not belonging to a recognized state; though they share many attributes with regular military forces, they are less often referred to as simply ''military''. A nation's military may f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonar 2087
Sonar 2087 is a towed array sonar designed and manufactured by Thales Underwater Systems at sites in the UK (Cheadle Heath in Stockport and Templecombe in Somerset) and in France (Brest). Sonar 2087 replaces the older Sonar 2031 in the Royal Navy and equips eight Type 23 frigates. The system is also expected to equip the Royal Navy's future Type 26 Global Combat Ship starting around 2020. It is a Low Frequency Active Sonar (LFAS) and consists of both active and passive sonar arrays. Thales describes the system as "a towed-array that enables Type 23 frigates to hunt the latest submarines at considerable distances and locate them beyond the range at which they ubmarinescan launch an attack." During Exercise Auriga in 2010, HMS ''Sutherland's'' capability equipped with Sonar 2087 was described as "world-beating" by the Sutherland's commanding officer. American, British, Canadian and French warships took part in the exercise, including the French nuclear submarine ''Perle''. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambient Noise Level
In atmospheric sounding and noise pollution, ambient noise level (sometimes called background noise level, reference sound level, or room noise level) is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source. Ambient sound levels are often measured in order to map sound conditions over a spatial regime to understand their variation with locale. In this case the product of the investigation is a sound level contour map. Alternatively ambient noise levels may be measured to provide a reference point for analyzing an intrusive sound to a given environment. For example, sometimes aircraft noise is studied by measuring ambient sound without presence of any overflights, and then studying the noise addition by measurement or computer simulation of overflight events. Or roadway noise is measured as ambient sound, prior to introducing a hypothetical noise barrier intended to reduce that ambient noise lev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decibel
The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 101/10 (approximately ) or root-power ratio of 10 (approximately ). The unit expresses a relative change or an absolute value. In the latter case, the numeric value expresses the ratio of a value to a fixed reference value; when used in this way, the unit symbol is often suffixed with letter codes that indicate the reference value. For example, for the reference value of 1 volt, a common suffix is " V" (e.g., "20 dBV"). Two principal types of scaling of the decibel are in common use. When expressing a power ratio, it is defined as ten times the logarithm in base 10. That is, a change in ''power'' by a factor of 10 corresponds to a 10 dB change in level. When expressing root-power quantities, a change in ''ampl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tonne
The tonne ( or ; symbol: t) is a unit of mass equal to 1000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton to distinguish it from the non-metric units of the short ton ( United States customary units), and the long ton ( British imperial units). It is equivalent to approximately 2204.6 pounds, 1.102 short tons, and 0.984 long tons. The official SI unit is the megagram (symbol: Mg), a less common way to express the same mass. Symbol and abbreviations The BIPM symbol for the tonne is t, adopted at the same time as the unit in 1879.Table 6 . BIPM. Retrieved on 2011-07-10. Its use is also official for the metric ton in the United States, having been adopted by the United States |
USNS Impeccable (T-AGOS-23)
USNS ''Impeccable'' (T-AGOS-23) is an ''Impeccable''-class ocean surveillance ship acquired by the U.S. Navy in 2001 and assigned to Military Sealift Command's Special Missions Program. Construction ''Impeccable'' was built by American Shipbuilding, Tampa, Florida. The contract was awarded on 28 March 1991. The ship's keel was laid down on 15 March 1992, but the Tampa shipyards went bankrupt by November 1993. On 3 December 1992, the General Accounting Office published a report that concluded that T-AGOS 24–27 should not be built. Shortly afterwards the government decided to discontinue this class of ships, but ''Impeccable'' was to be completed as the sole ship in her class. The hull was towed to Gulfport, Mississippi, in 1995 where she was finished by Halter Marine Inc. She was launched on 28 August 1998 and was delivered to the Navy on 22 March 2001 which assigned her to the Military Sealift Command (MSC) Special Missions Program. Design The ship is a designated T-AGOS ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low Frequency Active Sonar
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. "Sonar" can refer to one of two types of technology: ''passive'' sonar means listening for the sound made by vessels; ''active'' sonar means emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. The term ''sonar'' is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extrem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-governmental Organization
A non-governmental organization (NGO) or non-governmental organisation (see spelling differences) is an organization that generally is formed independent from government. They are typically nonprofit entities, and many of them are active in humanitarianism or the social sciences; they can also include clubs and associations that provide services to their members and others. Surveys indicate that NGOs have a high degree of public trust, which can make them a useful proxy for the concerns of society and stakeholders. However, NGOs can also be lobby groups for corporations, such as the World Economic Forum. NGOs are distinguished from international and intergovernmental organizations (''IOs'') in that the latter are more directly involved with sovereign states and their governments. The term as it is used today was first introduced in Article 71 of the newly-formed United Nations' Charter in 1945. While there is no fixed or formal definition for what NGOs are, they are genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stalwart Class Tactical Auxiliary General Ocean Surveillance Ships
''Stalwart''-class auxiliary general ocean surveillance ships ( T-AGOS) were a class of United States Naval Ship (USNS) auxiliary support Ocean Surveillance Ships commissioned between April 1984 and January 1990. Their original purpose was to collect underwater acoustical information using the Surveillance Towed Array Sensor System The AN/UQQ-2 Surveillance Towed Array Sensor System (SURTASS), colloquially referred to as the ship's "Tail", is a towed array sonar system of the United States Navy. SURTASS Twin-Line consists of either the long passive SURTASS array or the Twi ... (SURTASS), a towed array passive sonar. ''Stalwart'', ''Indomitable'', and ''Capable'' were modified to support narcotics interdiction by removing SURTASS equipment and adding an air-search radar and tactical data link equipment. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USNS Able (T-AGOS-20) Aft SURTASS Equipment
USNS ''Able'' (T-AGOS-20) is a ''Victorious''-class oceanographic survey ship in the service of the United States Navy's Military Sealift Command. Construction ''Able'' was laid down on 23 March 1989, at McDermott Shipyard, in Morgan City, Louisiana. Launched on 16 February 1991; sponsored by Mrs. Dorothy E. Thompson, wife of Rear Adm. William Thompson (Ret.); and placed in service with the Military Sealift Command (MSC) on 22 July 1992. ''Able'' is an MSC-manned ocean surveillance ship that uses surveillance towed-array sensor system equipment to gather underwater acoustical data. The command operates the ship as part of its Special Mission Ships Program, using her to support the antisubmarine warfare mission of the commanders of the Atlantic and Pacific Fleets. In addition, ''Able'' carries electronic equipment to process and transmit that data via satellites to shore stations for evaluation. She is built on a small-waterplane, twin-hull design for greater stability at slow spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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