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AUV
An autonomous underwater vehicle (AUV) is a robot that travels underwater without requiring input from an operator. AUVs constitute part of a larger group of undersea systems known as unmanned underwater vehicles, a classification that includes non-autonomous remotely operated underwater vehicles (ROVs) – controlled and powered from the surface by an operator/pilot via an umbilical or using remote control. In military applications an AUV is more often referred to as an unmanned undersea vehicle (UUV). Underwater gliders are a subclass of AUVs. History The first AUV was developed at the Applied Physics Laboratory at the University of Washington as early as 1957 by Stan Murphy, Bob Francois and later on, Terry Ewart. The "Special Purpose Underwater Research Vehicle", or SPURV, was used to study diffusion, acoustic transmission, and submarine wakes. Other early AUVs were developed at the Massachusetts Institute of Technology in the 1970s. One of these is on display in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unmanned Underwater Vehicle
Unmanned underwater vehicles (UUV), sometimes known as underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input. Classifications Remotely operated underwater vehicle Remotely Operated Underwater Vehicles (ROUVs) is a subclass of UUVs with the primary purpose of replacing humans for underwater tasks due to the difficult underwater conditions. ROUVs are designed to perform educational or industrial missions. They are manually controlled by an operator to perform tasks that include surveillance and patrolling. The structure of ROUVs disqualify it from being able to operate autonomously. In addition to a camera, actuators, and sensors, ROUVs often include a “gripper” or something ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Glider
An underwater glider is a type of autonomous underwater vehicle (AUV) that employs variable-buoyancy propulsion instead of traditional propellers or thrusters. It employs variable buoyancy in a similar way to a profiling float, but unlike a float, which can move only up and down, an underwater glider is fitted with hydrofoils (underwater wings) that allow it to glide forward while descending through the water. At a certain depth, the glider switches to positive buoyancy to climb back up and forward, and the cycle is then repeated. While not as fast as conventional AUVs, gliders offer significantly greater range and endurance compared to traditional AUVs, extending ocean sampling missions from hours to weeks or months, and to thousands of kilometers of range. The typical up-and-down, sawtooth-like profile followed by a glider can provide data on temporal and spatial scales unattainable by powered AUVs and much more costly to sample using traditional shipboard techniques. A wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malaysia Airlines Flight 370
Malaysia Airlines Flight 370 (MH370/MAS370) was an international passenger flight operated by Malaysia Airlines that disappeared on 8 March 2014 while flying from Kuala Lumpur International Airport in Malaysia to its planned destination, Beijing Capital International Airport. The crew of the Boeing 777-200ER registered as 9M-MRO, last communicated with air traffic control (ATC) around 38 minutes after takeoff when the flight was over the South China Sea. The aircraft was lost from ATC radar screens minutes later, but was tracked by military radar for another hour, deviating westward from its planned flight path, crossing the Malay Peninsula and Andaman Sea. It left radar range northwest of Penang Island in northwestern Peninsular Malaysia. With all 227 passengers and 12 crew aboard presumed dead, the disappearance of Flight 370 was the deadliest incident involving a Boeing 777 and the deadliest in Malaysia Airlines' history until it was surpassed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air France Flight 447
Air France Flight 447 (AF447 or AFR447) was a scheduled international passenger flight from Rio de Janeiro, Brazil, to Paris, France. On 1 June 2009, inconsistent airspeed indications led to the pilots inadvertently stalling the Airbus A330 serving the flight, failing to recover from it and eventually crashing into the Atlantic Ocean at 02:14 UTC, killing all 228 passengers and crew on board. The Brazilian Navy recovered the first major wreckage, and two bodies, from the sea within five days of the accident, but the investigation by France's Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA) was hampered because the aircraft's flight recorders were not recovered from the ocean floor until May 2011, nearly two years later. The BEA's final report, released at a news conference on 5 July 2012, concluded that the aircraft suffered temporary inconsistencies between the airspeed measurements—likely resulting from ice crystals obstructing the aircraft's pitot tubes— ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orca (AUV)
The Orca is an autonomous underwater vehicle (AUV) that is under development by Boeing and Huntington Ingalls Industries (HII) for the United States Navy. The Orca dates back to September 2017, when the Navy issued contracts worth about US$40 million each to Boeing, which had partnered earlier in the year with HII to build unmanned submarines, and Lockheed Martin to develop competing designs for an extra-large unmanned undersea vehicle (XLUUV) capable of autonomous operation on missions up to several months in duration. In February 2019, the Navy awarded the Boeing/HII consortium a $43 million contract to begin work on building four of their XLUUVs, the design of which would be based on Boeing's earlier AUV '' Echo Voyager''. The following month, the Navy added a fifth vehicle to the order, with the total value of the contract reaching $274.4 million. Orca deliveries were planned to be completed by the end of 2022. The basic Orca design shares a length with ''Echo Voyager'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaglider
The Seaglider is a deep-diving Autonomous Underwater Vehicle (AUV) designed for missions lasting many months and covering thousands of miles. In military applications the Seaglider is more commonly referred to as an Unmanned Underwater Vehicle (UUV). Seaglider was initially developed by the University of Washington. iRobot received an exclusive five-year license to produce the Seaglider for customers outside the University of Washington in June 2008. May 2013 Kongsberg Underwater Technology, Inc. (part of Kongsberg Maritime) announced that they have completed negotiations with the University of Washington's Center for Commercialization to obtain the sole rights to produce, market and continue the development of Seaglider ™ technology. Systems Seaglider measures temperature, salinity and other quantities in the ocean, sending back data using global satellite telemetry. Seaglider UUVs are in use worldwide, collecting oceanic physical properties and performing various other missi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluefin-21
The Bluefin-21 is an autonomous underwater vehicle (AUV) developed by Bluefin Robotics for defence, commercial or scientific use. It found its most famous use in April 2014 in the search for the wreckage of the missing Malaysia Airlines Flight 370. Design The Bluefin-21 is torpedo shaped and has interchangeable payload and battery components. This allows for the rapid deployment of the robot in time-bound missions. It has a modular design that can be adapted to carry a variety of sensors and payloads at one time, making it suitable for diverse deep-sea missions including offshore survey, marine salvage detection, marine archeology survey, oceanography, mine countermeasures, and the detection of unexploded ordnance. It is said to take two hours to descend to the bottom of the ocean and a further two hours to surface, with the ability to search for sixteen hours. Bluefin-21 is powered by nine lithium-polymer batteries, each rated at . This allows the robot to reach a top spee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SPURV
SPURV, or Self-Propelled Underwater Research Vehicle, was an Autonomous Underwater Vehicle built in 1957 at the University of Washington's Applied Physics Laboratory. The research and development of this vehicle was funded by the United States Office of Naval Research (ONR), and it became the US Navy’s first autonomous underwater vehicle (AUV). The navy used a total of 7 SPURV vehicles until 1979. Construction The original engineers of SPURV were Bob Van Wagennen (mechanical) and Wayne Nodland (electrical). Terry Ewart calculated the hydrodynamics design on a Berkeley EASE analog computer. SPURV was machined by Boeing from a forging of 7078-T6 aluminum. Capability SPURV had an operating depth of at least 3000 meters and a maximum depth of 3600 meters. It could go about 4-5 knots for about 4 hours. A propulsion battery consisting of 2 sets of 16 silver zinc cells connected in a parallel through diodes was the primary power source for SPURV. The battery provided a 24-volt, 200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bile Salts
Bile acids are steroid acids found predominantly in the bile of mammals and other vertebrates. Diverse bile acids are synthesized in the liver. Bile acids are conjugated with taurine or glycine residues to give anions called bile salts. Primary bile acids are those synthesized by the liver. Secondary bile acids result from bacterial actions in the colon. In humans, taurocholic acid and glycocholic acid (derivatives of cholic acid) and taurochenodeoxycholic acid and glycochenodeoxycholic acid (derivatives of chenodeoxycholic acid) are the major bile salts. They are roughly equal in concentration. The salts of their 7-alpha-dehydroxylated derivatives, deoxycholic acid and lithocholic acid, are also found, with derivatives of cholic, chenodeoxycholic and deoxycholic acids accounting for over 90% of human biliary bile acids. Bile acids comprise about 80% of the organic compounds in bile (others are phospholipids and cholesterol). An increased secretion of bile acids produces an inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MK 18 MOD 2 Swordfish UUV
MK or mk may refer to: In arts, entertainment and media Fictional characters * Moon Knight, a Marvel Comics superhero * M.K., an '' ''Into the Badlands'' (TV series) character * Mary Katherine "M.K." Bomba, the protagonist in ''Epic'' (2013 film) Video games * '' Makai Kingdom: Chronicles of the Sacred Tome'', a tactical role-playing game * ''Mario Kart'', a series of racing video games developed and published by Nintendo featuring characters from the ''Mario'' franchise * ''Mortal Kombat'', a series of fighting video games developed and published by Midway Games, and later Warner Bros Other media * MK (channel), a defunct, South African, Afrikaans-language music television channel * Moskovskij Komsomolets, a Russian newspaper In business and finance * Markup (business), a term for the difference between the cost of a good or service and its selling price * Mark (designation), a designation used to identify versions of a product or item, e.g. Mk. II * Finnish markka (symbol: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MK18 Mod 2 Kingfish Underwater Unmanned Vehicle
Mark XVIII or Mark 18 often refers to the 18th version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk." Mark XVIII or Mark 18 can specifically refer to: In technology In military and weaponry * De Havilland Mosquito NF Mk XVIII; a Royal Air Force night fighter radar modification * De Havilland Mosquito FB Mk XVIII, also called ''Tsetse''; RAF ground-attack aircraft carrying a QF 6 pounder (57 mm) anti-tank gun * Supermarine Spitfire Mk 18; a further development of the Mk XIV, arriving too late to serve in World War II *Mark 18 torpedo, 1944 US Navy electric torpedo *Mark 18 nuclear bomb; 1953 American nuclear bomb *CQBR The Close Quarter Battle Receiver (CQBR) is a replacement Receiver (firearms), upper receiver for the M4 carbine, M4A1 Carbine, developed by the US Navy. The CQBR features a 10.3 in (262 mm) length Gun barrel, barrel (similar to the CAR-15 ... Mark 18 Mod 0; a modification of the M4 Carbine * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
