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USS Springfield (SSN-761)
USS ''Springfield'' (SSN-761), a , is the fourth ship of the United States Navy to bear the name. The boat was named in honor of both the cities of Springfield, Illinois and Springfield, Massachusetts. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 21 March 1986, and her keel was laid down on 29 January 1990. She was launched on 4 January 1992 sponsored by Lynn Martin, and commissioned on 9 January 1993. ''Springfield'' is homeported at Naval Base Guam in Agana, Guam and is assigned to Submarine Squadron FIFTEEN. In mid-2004, ''Springfield'' began an extensive overhaul, or Depot Modernization Period (DMP), at the Electric Boat shipyard in Groton. In addition to normal periodic maintenance and repairs, ''Springfield'' received extensive modernization in fire control systems, sonar processing, weapons launch systems, and communications outfit, a ring laser gyro inertial navigation system, as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keel Laying
Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one of the four specially celebrated events in the life of a ship; the others are launching, commissioning and decommissioning. In earlier times, the event recognized as the keel laying was the initial placement of the central timber making up the backbone of a vessel, called the keel. As steel ships replaced wooden ones, the central timber gave way to a central steel beam. Modern ships are most commonly built in a series of pre-fabricated, complete hull sections rather than around a single keel. The event recognized as the keel laying is the first joining of modular components, or the lowering of the first module into place in the building dock. It is now often called "keel authentication", and is the ceremonial beginning of the ship's life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ships Built In Groton, Connecticut
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity, and purpose. Ships have supported exploration, trade, warfare, migration, colonization, and science. After the 15th century, new crops that had come from and to the Americas via the European seafarers significantly contributed to world population growth. Ship transport is responsible for the largest portion of world commerce. The word ''ship'' has meant, depending on the era and the context, either just a large vessel or specifically a ship-rigged sailing ship with three or more masts, each of which is square-rigged. As of 2016, there were more than 49,000 merchant ships, totaling almost 1.8 billion dead weight tons. Of these 28% were oil tankers, 43% were bulk carriers, and 13% were con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Submarines Of The United States Navy
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Nuclear may refer to: Physics Relating to the nucleus of the atom: * Nuclear engineering *Nuclear physics *Nuclear power *Nuclear reactor *Nuclear weapon *Nuclear medicine *Radiation therapy *Nuclear warfare Mathematics *Nuclear space *Nuclear operator *Nuclear congruence *Nuclear C*-algebra Biology Relating to the nucleus of the cell: * Nuclear DNA Society * Nuclear family, a family consisting of a pair of adults and their children Music * "Nuclear" (band), group music. * "Nuclear" (Ryan Adams song), 2002 *"Nuclear", a song by Mike Oldfield from his ''Man on the Rocks'' album * ''Nu.Clear'' (EP) by South Korean girl group CLC See also *Nucleus (other) *Nucleolus * Nucleation * Nucleic acid *Nucular ''Nucular'' is a common, proscribed pronunciation of the word "nuclear". It is a rough phonetic spelling of . The ''Oxford English Dictionary''s entry dates the word's first published appearance to 1943. Dictionary notes This is one of two con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles-class Submarines
LOS, or Los, or LoS may refer to: Science and technology * Length of stay, the duration of a single episode of hospitalisation * Level of service, a measure used by traffic engineers * Level of significance, a measure of statistical significance * Line-of-sight (other) * LineageOS, a free and open-source operating system for smartphones and tablet computers * Loss of signal ** Fading **End of pass (spaceflight) * Loss of significance, undesirable effect in calculations using floating-point arithmetic Medicine and biology * Lipooligosaccharide, a bacterial lipopolysaccharide with a low-molecular-weight * Lower oesophageal sphincter Arts and entertainment * ''The Land of Stories'', a series of children's novels by Chris Colfer * Los, or the Crimson King, a character in Stephen King's novels * Los (band), a British indie rock band from 2008 to 2011 * Los (Blake), a character in William Blake's poetry * Los (rapper) (born 1982), stage name of American rapper Carlos Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arleigh Burke
Arleigh Albert Burke (October 19, 1901 – January 1, 1996) was an admiral of the United States Navy who distinguished himself during World War II and the Korean War, and who served as Chief of Naval Operations during the Eisenhower and Kennedy administrations. , the lead ship of its class of Aegis-equipped guided missile destroyers, was commissioned in Burke's honor in 1991. The honor of naming a vessel after a living figure was only the fourth time it had been bestowed since 1861. Early life and naval career Burke was born in Boulder, Colorado, on October 19, 1901, to Oscar Burke and Clara Mokler. His grandfather, August Björkgren, was a Swedish immigrant to the US and changed his surname to 'Burke', a common Irish surname, to sound more 'American'. Due to the 1918 influenza outbreak, schools were closed in Boulder and he never graduated from high school. Burke won an alternate appointment to the United States Naval Academy given by his local congressman. During his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle E
The Battle Effectiveness Award (formerly the Battle Efficiency Award, commonly known as the Battle "E"), is awarded annually to the small number of United States Navy ships, submarines, aviation, and other units that win their battle effectiveness competition. The criterion for the Battle Effectiveness Award is the overall readiness of the command to carry out its assigned wartime tasks, and is based on a year-long evaluation. The competition for the award is, and has always been, extremely keen. To win, a ship or unit must demonstrate the highest state of battle readiness. The Battle Effectiveness Award recognizes sustained fast and winning performance in an operational environment within a command. To qualify for Battle "E" consideration, a ship must win a minimum of four of the six Command Excellence awards and be nominated by their immediate superior in command. Eligibility for the award demands day-to-day demonstrated excellence in addition to superior achievement during the ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meritorious Unit Commendation
The Meritorious Unit Commendation (MUC; pronounced ''muck'') is a mid-level unit award of the United States Armed Forces. The U.S. Army awards units the Army MUC for exceptionally meritorious conduct in performance of outstanding achievement or service in combat or non-combat, the U.S. Navy and U.S. Marine Corps award units the Navy MUC for valorous or meritorious achievement or service in combat or non-combat, and the U.S. Coast Guard awards units the Coast Guard MUC for valorous or meritorious achievement or service not involving combat. Army ;Army Meritorious Unit Commendation: The Army MUC emblem worn to represent award of the MUC is 1 inches wide and inches in height. The emblem consists of a inch wide gold frame with laurel leaves which encloses a scarlet 67111 ribbon. The previously authorized emblem was a gold color embroidered laurel wreath, 1 inches in diameter on a 2 inches square of olive drab cloth. The Army MUC (previously called the Meritorious Service Unit P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ring Laser Gyro
A ring laser gyroscope (RLG) consists of a ring laser having two independent counter-propagating resonant modes over the same path; the difference in phase is used to detect rotation. It operates on the principle of the Sagnac effect which shifts the nulls of the internal standing wave pattern in response to angular rotation. Interference between the counter-propagating beams, observed externally, results in motion of the standing wave pattern, and thus indicates rotation. Description The first experimental ring laser gyroscope was demonstrated in the US by Macek and Davis in 1963. Various organizations worldwide subsequently developed ring-laser technology further. Many tens of thousands of RLGs are operating in inertial navigation systems and have established high accuracy, with better than 0.01°/hour bias uncertainty, and mean time between failures in excess of 60,000 hours. Ring laser gyroscopes can be used as the stable elements (for one degree of freedom each) in an ine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 navigation, 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 ... [...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] |
