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Swimfin
Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater hockey, underwater rugby and various other types of underwater diving. Swimfins help the wearer to move through water more efficiently, as human feet are too small and inappropriately shaped to provide much thrust, especially when the wearer is carrying equipment that increases hydrodynamic drag. Very long fins and monofins used by freedivers as a means of underwater propulsion do not require high-frequency leg movement. This improves efficiency and helps to minimize oxygen consumption. Short, stiff-bladed fins are effective for short bursts of acceleration and maneuvering, and are useful fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis De Corlieu
Louis Marie de Corlieu (born 23 November 1888 in Bourges; died 19 October 1967 or 1971) in Paris, was a French naval officer and inventor of the swimfin. Military service He served as Capitaine de corvette (lieutenant commander) in the French navy in the First World War. In 1925 he left the navy to study techniques for survival at sea. Invention of the swimfin After working as a hydrographer in the Belgian Congo from 1928 to 1933, he developed swimfins in 1933, patented them in Paris, and registered them in seven other countries. De Corlieu demonstrated his first prototype of a modern swimfin in front of an audience of officers which included Yves Le Prieur who invented an underwater breathing apparatus in 1926 to 1934. The combination of de Corlieu's fins with le Prieur's breathing apparatus in 1935 was a significant development towards the free-swimming scuba diver. In 1939, de Corlieu finally started mass production of his fins, which until then he had made in his apartment in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Hockey
Underwater hockey (UWH), also known as Octopush in the United Kingdom, is a globally played limited-contact sport in which two teams compete to manoeuvre a puck across the bottom of a swimming pool into the opposing team's goal by propelling it with a hockey stick (or pusher). A key challenge of the game is that players are not able to use breathing devices such as scuba gear whilst playing, they must hold their breath. The game originated in Portsmouth, England in 1954 when Alan Blake, a founder of the newly formed Southsea Sub-Aqua Club, invented the game he called Octopush as a means of keeping the club's members interested and active over the cold winter months when open-water diving lost its appeal. Underwater hockey is now played worldwide, with the Confédération Mondiale des Activités Subaquatiques, abbreviated CMAS, as the world governing body. The first Underwater Hockey World Championship was held in Canada in 1980. History Originally called "Octopush" (and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monofin
A monofin is a type of swimfin typically used in underwater sports such as finswimming, free-diving and underwater orienteering. It consists of a single or linked surfaces attached to both of the diver's feet, emulating the fluke of Cetaceans like whales or porpoises. Even though the diver's appearance might be reminiscent of a mermaid or merman, monofin swimming is not the same as mermaiding. The arrival of the monofin in the early 1970s led to the breaking of all finswimming world records by the end of the decade due to the improved performance possible when used instead of two ordinary swimfins. Use To differentiate between the use of monofins and conventional fins, the latter are sometimes referred to as stereo fins or bi-fins. The monofin swimmer extends arms forward, locking hands together, locking the head between the biceps, in a position known as streamline position. The undulating movement starts in the shoulders, with maximum amplitude towards the hips; the le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spearfishing
Spearfishing is fishing using handheld elongated, sharp-pointed tools such as a spear, gig, or harpoon, to impale the fish in the body. It was one of the earliest fishing techniques used by mankind, and has been deployed in artisanal fishing throughout the world for millennia. Early civilizations were familiar with the custom of spearing fish from rivers and streams using sharpened sticks. Modern spearfishing usually involves the use of underwater swimming gear and slingshot-like elastic spearguns or compressed gas powered pneumatic spearguns, which launch a tethered dart-like projectile to strike the target fish. Specialised techniques and equipment have been developed for various types of aquatic environments and target fish. Spearfishing uses no bait and is highly selective, with no by-catch, but inflicts lethal injury to the fish and thus precludes catch and release. Spearfishing may be done using free-diving, snorkelling, or scuba diving techniques, but spearfish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snorkeling
Snorkeling (American and British English spelling differences#Doubled in British English, British and Commonwealth English spelling: snorkelling) is the practice of human swimming, swimming face down on or through a body of water while breathing the ambient air through a shaped tube called a Snorkel (swimming), snorkel, usually with swimming goggles or a diving mask, and swimfins. In cooler waters, a wetsuit may also be worn. The snorkel may be an independent item or integrated with the mask. The use of this equipment allows the snorkeler to observe the underwater environment for extended periods with relatively little effort, and to breathe while face-down at the surface. Snorkeling is a popular recreational activity, particularly at tropics, tropical resort locations. It provides the opportunity to observe marine biology#Lifeforms, underwater life in a natural setting without the complicated equipment and training required for scuba diving. It appeals to all ages because of ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siebe Gorman
Siebe Gorman & Company Ltd was a British company that developed diving equipment and breathing equipment and worked on commercial diving and marine salvage projects. The company advertised itself as 'Submarine Engineers'. It was founded by Augustus Siebe, a Germany, German-born British engineer chiefly known for his contributions to diving equipment. Siebe plc started in the 1970s as a continuation of Siebe Gorman when Siebe Gorman started to take over other firms, to mean the new conglomerate to distinguish it from Siebe Gorman's original breathing apparatus and diving gear core business. Siebe plc was once one of the United Kingdom's largest engineering businesses. It was a constituent of the FTSE 100 Index but in 1999 it merged with BTR plc to form Invensys. Invensys was taken over by the French multinational Schneider Electric for £3.4 billion in January 2014. History *1788: Augustus Siebe was born in Saxony in Germany, named Christian Augustus Siebe.pages 16 etseq, ''The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Diving
Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving (other), diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have Physiology, physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Rugby
Underwater Rugby (UWR) is an underwater team sport in which two teams compete to deliver a negatively buoyant ball into the opponents’ goal at the bottom of a swimming pool. It originated from physical fitness training programs in German diving clubs during the early 1960s. Recognized by the Confédération Mondiale des Activités Subaquatiques (CMAS) in 1978, it was first played in a world championship in 1980. The sport has little in common with rugby football, except for its name. History In 1961, Ludwig von Bersuda, a member of the German Underwater Club (DUC) in Cologne, conceived the idea of an underwater ball game. Since air-filled balls are unsuitable for underwater games due to buoyancy, von Bersuda experimented with a ball filled with saltwater. Since saltwater is denser than pool water, the ball slowly sinks to the bottom. The sink rate can be controlled within limits by adjusting the concentration of the salt solution. Water polo balls are used instead of l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scuba Diving
Scuba diving is a Diving mode, mode of underwater diving whereby divers use Scuba set, breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The word ''scuba'' is an Acronym#Normal case and acronyms, acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, affording them greater independence and movement than surface-supplied divers, and more time underwater than freedivers. Although the use of compressed air is common, other gas blends are also used. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kneeboarding (surfsport)
Kneeboarding is a discipline of surfing where the rider paddles on his or her belly into a wave on a ''kneeboard'', then rides the wave face typically on both knees. The typical kneeboard is between in length, with a wide round nose and constructed of Glassfibre over a polyurethane Polyurethane (; often abbreviated PUR and PU) is a class of polymers composed of organic chemistry, organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane term ... foam core. Kneeboard designers however are known for their wild experimental excess and so most modern materials including various aerospace elements such as Titanium alloys (for fins), carbon fibre and kevlar in epoxy matrices are not unusual. Modern kneeboards may have a rubber pad for the rider's knees, preventing undue wear of the knees, also preventing slipping to help the rider maintain control. Kneeboarders also typically use swimfins and an ank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bodysurfing
Bodysurfing is the sport of riding a wave without the assistance of any buoyant device such as a surfboard or bodyboard. Bodysurfers often equip themselves with a pair of swimfins that aid propulsion and help the bodysurfer catch, ride, and kick out of waves. Some bodysurfers also use a wooden or foam Handplane (bodysurfing), handplane, which helps to get one's chest out of the water to reduce drag, this is known as handplaning and is an offshoot of bodysurfing. Some of the best waves for bodysurfing are steep, fast, tubing beachbreak waves that are often unsuitable for boardsurfing; two of the best known are Sandy Beach and Makapuu on the east shore of Oahu in Hawaii. The Wedge (surfing), The Wedge, in Newport Beach, California, a ferocious sand-pounding peak wave aptly described by ''Sports Illustrated'' in 1971 as "a great big screaming shorebreak," has for decades been bodysurfing's most fearsome and famous break. Other regions with world-class bodysurfing waves include Hosseg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benjamin Franklin
Benjamin Franklin (April 17, 1790) was an American polymath: a writer, scientist, inventor, statesman, diplomat, printer, publisher and Political philosophy, political philosopher.#britannica, Encyclopædia Britannica, Wood, 2021 Among the most influential intellectuals of his time, Franklin was one of the Founding Fathers of the United States; a Committee of Five, drafter and signer of the United States Declaration of Independence, Declaration of Independence; and the first United States Postmaster General, postmaster general. Born in the Province of Massachusetts Bay, Franklin became a successful Early American publishers and printers, newspaper editor and printer in Philadelphia, the leading city in the colonies, publishing ''The Pennsylvania Gazette'' at age 23. He became wealthy publishing this and ''Poor Richard's Almanack'', which he wrote under the pseudonym "Richard Saunders". After 1767, he was associated with the ''Pennsylvania Chronicle'', a newspaper known for it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
