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Line Thrower
A line thrower is a device that casts a line to a remote position. It is used in rescues as well as marine operations. A line thrower may employ a variety of launching methods including guns, rockets, and pneumatics. History Roman general Marcus Vipsanius Agrippa created the ''harpax'', a ship-based grapnel that could be fired by a ballista. The ''harpax'' allowed an enemy vessel to be harpooned and then winched alongside for boarding. Appian explains the device as "a piece of wood, five cubits long bound with iron and having rings at the extremities. To one of these rings was attached the grip itself, an iron claw, to the other numerous ropes, which drew it by machine power after it had been thrown by a catapult and had seized the enemy's ships." The ''harpax'' had a distinct advantage over the ''corvus'', the traditional naval boarding bridge, in that it was much lighter; the ''corvus'' boarding bridge is estimated to have weighed a ton. The ''harpax'' could be thrown long dista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rescue
Rescue comprises responsive operations that usually involve the saving of life, or the urgent treatment of injuries after an accident or a dangerous situation. Tools used might include search and rescue dogs, mounted search and rescue horses, helicopters, the "jaws of life", and other hydraulic cutting and spreading tools used to extricate individuals from wrecked vehicles. Rescue operations are sometimes supported by rescue vehicles operated by rescue squads. Rescue is a potent theme in human psychology, both from mortal perils and moral perils, and is often treated in fiction, with the rescue of a damsel in distress being a notable trope. Psychoanalyst Sigmund Freud introduced the concept of "rescue fantasies" by men pursuing "fallen women" in his 1910 work "A Special Type of Choice of Object Made by Men"; Freud's insight into this aspect of male psychology might retain merit, though his proposed Oedipus complex used to frame this concept is no longer in vogue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Trengrouse
Henry Trengrouse (18 March 1772 – 14 February 1854) was a British inventor who invented the "Rocket" lifesaving apparatus. On 24 December 1807 he witnessed the wreck of the frigate ''Anson'' in Mount's Bay, when over a hundred people died, and this disaster led him to devote his life and patrimony to the discovery of some means for saving lives at shipwrecks. He spent much labour in attempting to devise a lifeboat, but produced no satisfactory results, and turned his attention to the "Rocket" lifesaving apparatus, an early form of the Breeches buoy. In addition to this, Trengrouse was dismayed at the then common practice of burying victims of shipwrecks in common graves in unconsecrated ground near the site of the wreck, having seen the dead from the ''Anson'' buried in the dunes at Loe Bar. He persuaded his local MP, Davies Gilbert, to work for a change in the law, and from 1808 the practice was abolished. Early life Trengrouse was born in Helston, Cornwall, was the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Maritime Search And Rescue Service
The German Maritime Search and Rescue Service (german: Deutsche Gesellschaft zur Rettung Schiffbrüchiger - DGzRS, ; lit. ''German Society for the Rescue of Shipwrecked Persons'') is responsible for Search and Rescue in German territorial waters in the North Sea and the Baltic Sea, including the Exclusive Economic Zone. The headquarters and the Maritime Rescue Coordination Centre of the Society are located in Bremen. It was founded in Kiel on 29 May 1865. It owns 60 lifeboats at 55 stations which are operated by 185 employed crew members and 800 volunteers. The society has about 2000 engagements every year. Up to 2019, it rescued approximately 85,000 persons. In 2019 it saved 81 lives, rescued 270 persons from critical situations and carried out 373 medical transports. The ''DGzRS'' is entirely financed by membership fees, private donations and legacies. Writer and honorary member Nikolai von Michalewsky has immortalized the ''DGzRS'' in his series of science fiction novels by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slingshot
A slingshot is a small hand-powered projectile weapon. The classic form consists of a Y-shaped frame, with two natural rubber strips or tubes attached to the upper two ends. The other ends of the strips lead back to a pocket that holds the projectile. One hand holds the frame, while the other hand grasps the pocket and draws it back to the desired extent to provide power for the projectile—up to a full span of the arm with sufficiently long bands. Other names include catapult (United Kingdom), peashooter (United States), gulel (India), getis / guleli (Nepal), (South Africa), or ging, shanghai, pachoonga (Australia and New Zealand), Tirador (Philippines). Use and history Slingshots depend on strong elastic materials, typically vulcanized natural rubber or the equivalent such as silicone rubber tubing, and thus date no earlier than the invention of vulcanized rubber by Charles Goodyear in 1839 (patented in 1844). By 1860, this "new engine" had established a reputation for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumatic Line Thrower
Pneumatic line throwers can be used for a variety of applications including underway replenishment (UNREPS), replenishment at sea (RASing), ship to ship line deployment, ship to shore line deployment, water rescue, high angle rescue, cable running in industrial applications, and tactical line deployment. Line throwers come in two categories: pyrotechnic and pneumatic. ''Pyrotechnical line throwers'' are inherently dangerous as they contain explosives which, when triggered, propel a line forward. This equipment should be stored, handled and used appropriately. This equipment requires significant training in order to ensure correct use and to avoid accidents. In the late 1980s, ''pneumatic line throwers'' were invented to provide a product that is safer, cost effective, and has long delivery distances. Technology Pneumatic systems have three basic components: the launcher, a projectile, and the line. These systems are based on Newton’s Third Law of Motion Newton's laws of mot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SOLAS Convention
The International Convention for the Safety of Life at Sea (SOLAS) is an international maritime treaty that sets minimum safety standards in the construction, equipment and operation of merchant ships. The International Maritime Organization convention requires signatory flag states to ensure that ships flagged by them comply with at least these standards. The current version of SOLAS is the 1974 version, known as SOLAS 1974, which came into force on 25 May 1980. , SOLAS 1974 has 167 contracting states, which flag about 99% of merchant ships around the world in terms of gross tonnage. SOLAS in its successive forms is generally regarded as the most important of all international treaties concerning the safety of merchant ships. Signatories The non-parties to SOLAS 1974 include numerous landlocked countries (for obvious reasons), as well as El Salvador, Micronesia and East Timor. Some others including Bolivia, Lebanon and Sri Lanka, all considered flag of convenience states, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boxer Rocket
Boxer most commonly refers to: *Boxer (boxing), a competitor in the sport of boxing *Boxer (dog), a breed of dog Boxer or boxers may also refer to: Animal kingdom *Boxer crab * Boxer shrimp, a small group of decapod crustaceans * Boxer snipe eel, ''Nemichthys curvirostris'' Film and television * Boxer TV Access, a Swedish digital TV provider * ''Boxer'' (1984 film), a 1984 Hindi-language film * ''Boxer'' (2015 film), a 2015 Kannada-language film * ''Boxer'' (2018 film) a 2018 Bengali-language film * ''The Boxer'' (1997 film), a 1997 film starring Daniel Day-Lewis * ''The Boxer'' (1958 film), a 1958 Mexican sports drama film * ''The Boxer'' (2012 film), a 2012 short film starring Paul Barber *''The Boxer'', aka ''Ripped Off'', a 1972 Italian film starring Robert Blake and Ernest Borgnine * ''The Boxers'', a Hong Kong film of 1973 Military *Boxer (armoured fighting vehicle), a European, multi-role, armoured vehicle *Boxer Rebellion, a 1900 armed conflict in China ** Boxer moveme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyle Gun
A Lyle gun was a line thrower powered by a short-barrelled cannon. It was invented by Captain David A. Lyle, US Army, a graduate of West Point and the Massachusetts Institute of Technology and were used from the late 19th century to 1952, when they were replaced by rockets for throwing lines. History Earlier line thrower designs date back to the late 18th century, with the Manby mortar saving lives as early as 1808 when the crew of a brig was rescued at Yarmouth by the use of the device fired from a carriage gun and supervised by captain George Manby. A rocket-based system was also devised by British engineer Henry Trengrouse in 1808. Sumner Increase Kimball, the first and subsequently only superintendent of the United States Life-Saving Service, wanted to find a better line-throwing device. Kimball engaged the help of the United States Army Board of Ordnance and in 1877 they assigned David A. Lyle (1845–1937), a first lieutenant, who began research and testing that resul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smooth-bore
A smoothbore weapon is one that has a barrel without rifling. Smoothbores range from handheld firearms to powerful tank guns and large artillery mortars. History Early firearms had smoothly bored barrels that fired projectiles without significant spin. To minimize inaccuracy-inducing tumbling during flight, their projectiles required an aerodynamically uniform shape, such as a sphere. However, surface imperfections on the projectile and/or the barrel will cause even a sphere to rotate randomly during flight, and the Magnus effect will curve it off the intended trajectory when spinning on any axis not parallel to the direction of travel. Rifling the bore surface with spiral grooves or polygonal valleys imparts a stabilizing gyroscopic spin to a projectile that prevents tumbling in flight. Not only does this more than counter Magnus-induced drift, but it allows a longer, more streamlined round with greater sectional density to be fired from the same caliber barrel, improvin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals, such as phosphorus, or metalloids such as arsenic or silicon. These additions produce a range of alloys that may be harder than copper alone, or have other useful properties, such as strength, ductility, or machinability. The archaeological period in which bronze was the hardest metal in widespread use is known as the Bronze Age. The beginning of the Bronze Age in western Eurasia and India is conventionally dated to the mid-4th millennium BCE (~3500 BCE), and to the early 2nd millennium BCE in China; elsewhere it gradually spread across regions. The Bronze Age was followed by the Iron Age starting from about 1300 BCE and reaching most of Eurasia by about 500 BCE, although bronze continued to be much more widely used than it is in modern times. Because histori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Life-Saving Service
The United States Life-Saving ServiceDespite the lack of hyphen in its insignia, the agency itself is hyphenated in government documents including: and was a United States government agency that grew out of private and local humanitarian efforts to save the lives of shipwrecked mariners and passengers. It began in 1848 and ultimately merged with the Revenue Cutter Service to form the United States Coast Guard in 1915. Early years The concept of assistance to shipwrecked mariners from shore-based stations began with volunteer lifesaving services, spearheaded by the Massachusetts Humane Society. It was recognized that only small boats stood a chance of assisting those close to the beach. A sailing ship trying to help near to the shore stood a good chance of also running aground, especially if there were heavy onshore winds. The Massachusetts Humane Society founded the first lifeboat station at Cohasset, Massachusetts. The stations were small shed-like structures, holding rescue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumner Increase Kimball
Sumner Increase Kimball (September 2, 1834 – June 20, 1923) was the organizer of the United States Life-Saving Service and the General Superintendent of the Life-Saving Service from 1878–1915. Originally a lawyer and a legislative administrator, Kimball spent his life creating and leading the Life-Saving Service, one of the predecessor services that eventually became the US Coast Guard, transforming it from an uneven collection of facilities round the US coastline into a coherent and well-trained organization. Biography Sumner Increase Kimball was born in Lebanon, Maine on September 2, 1834. Raised in Sanford, Maine, he graduated from Bowdoin College in 1855, and was admitted to the bar in 1858. He was elected to the Maine House of Representatives in 1859. He became a clerk in the United States Treasury Department in 1862, and was placed in charge of the Revenue Marine Bureau there in 1871. When the Life-Saving Bureau was organized in 1878 he was appointed its head. Under h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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