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Water Ski
Water skiing (also waterskiing or water-skiing) is a surface water sport in which an individual is pulled behind a boat or a cable ski installation over a body of water, skimming the surface on two skis or one ski. The sport requires sufficient area on a stretch of water, one or two skis, a tow boat with tow rope, two or three people (depending on local boating laws), and a personal flotation device. In addition, the skier must have adequate upper and lower body strength, muscular endurance, and good balance. There are water ski participants around the world, in Asia and Australia, Europe, Africa, and the Americas. In the United States alone, there are approximately 11 million water skiers and over 900 sanctioned water ski competitions every year. Australia boasts 1.3 million water skiers. There are many options for recreational or competitive water skiers. These include speed skiing, trick skiing, show skiing, slaloming, jumping, barefoot skiing and wakeski. Similar, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarra River
The Yarra River or historically, the Yarra Yarra River, ( Kulin languages: ''Berrern'', ''Birr-arrung'', ''Bay-ray-rung'', ''Birarang'', ''Birrarung'', and ''Wongete'') is a perennial river in south-central Victoria, Australia. The lower stretches of the Yarra are where Victoria's state capital Melbourne was established in 1835, and today metropolitan Greater Melbourne dominates and influences the landscape of its lower reaches. From its source in the Yarra Ranges, it flows west through the Yarra Valley which opens out into plains as it winds its way through Greater Melbourne before emptying into Hobsons Bay in northernmost Port Phillip Bay. The river has been a major food source and meeting place for Indigenous Australians for thousands of years. Shortly after the arrival of European settlers, land clearing forced the remaining Wurundjeri people into neighbouring territories and away from the river. Originally called ''Birrarung'' by the Wurundjeri, the current name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recreation
Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for enjoyment, amusement, or pleasure and are considered to be "fun". Etymology The term ''recreation'' appears to have been used in English first in the late 14th century, first in the sense of "refreshment or curing of a sick person", and derived turn from Latin (''re'': "again", ''creare'': "to create, bring forth, beget"). Prerequisites to leisure People spend their time on activities of daily living, work, sleep, social duties and leisure, the latter time being free from prior commitments to physiologic or social needs, a prerequisite of recreation. Leisure has increased with increased longevity and, for many, with decreased hours spent for physical and economic survival, yet others argue that time pressure has increased for modern people, as they are committed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V-drive
V-drive is a propulsion system for boats that consists of two drive shafts, a gearbox, and a propeller. In a "V-drive" boat, the engine is mounted in the rear of the boat and the front of the engine faces aft. Connected to the rear of the engine is the transmission. The first drive shaft connects the rear of the transmission to a gearbox mounted in the center of the boat. The second drive shaft extends from the gearbox to the rear and out the bottom of the boat to where a propeller is mounted. Fred Cooper's 1935 design for Malcolm Campbell's ''Blue Bird The bluebirds are a North American group of medium-sized, mostly insectivorous or omnivorous birds in the order of Passerines in the genus ''Sialia'' of the thrush family (Turdidae). Bluebirds are one of the few thrush genera in the Americas. B ...'' used a v-drive designed by Reid Railton for its 2,000 bhp engine. References Marine propulsion {{Water-transport-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ski Nautique 200 - OB
A ski is a narrow strip of semi-rigid material worn underfoot to glide over snow. Substantially longer than wide and characteristically employed in pairs, skis are attached to ski boots with ski bindings, with either a free, lockable, or partially secured heel. For climbing slopes, ski skins (originally made of seal fur, but now made of synthetic materials) can be attached at the base of the ski. Originally intended as an aid to travel over snow, they are now mainly used recreationally in the sport of skiing. Etymology and usage The word ''ski'' comes from the Old Norse word which means "cleft wood", "stick of wood" or "ski". In Old Norse common phrases describing skiing were ''fara á skíðum'' (to travel, move fast on skis), ''renna'' (to move swiftly) and ''skríða á skíðum'' (to stride on skis). In modern Norwegian the word ''ski'' has largely retained the Old Norse meaning in words for split firewood, wood building materials (such as bargeboards) and roundpole fence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cable Skiing
Cable skiing is a way to water ski (or wakeboard), in which the skier's rope and handle are pulled by an electrically-driven cable, whereas traditionally a waterskier is pulled by a motorboat. The mechanism consists of two cables running parallel to one another with carriers between them every 80 metres. The carriers are metal tubes that can hook up tow ropes with riders. Tow ropes are detached and attached at the same time without slowing the system down, which is a main reason for its high efficiency. With a main cable of 800 metres long, 10 riders can waterski or wakeboard at the same time. The speed of the main cable can be up to 38 mph (61 km/h), and slalom skiers can reach much higher speeds. The most common speed is 19 mph (31 km/h), which suits wakeboarders best. The cable is generally suspended 26–30 feet (8–9 metres) above the water. This makes for a different feel than when riding behind a boat, whether wakeboarding or water skiing. The highe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Datteln - KF2011 - Ostufer 06 Ies
Datteln is a town in the district of Recklinghausen, in North Rhine-Westphalia, Germany. It is situated on a crossroads of four canals (Datteln-Hamm Canal, Wesel-Datteln Canal, Dortmund-Ems Canal and Rhein-Herne Canal), which makes it the biggest canal junction in the World, approx. 10 km north-east of Recklinghausen and 20 km north-west of Dortmund. Katja Seizinger, retired ski racing champion and triple Olympic gold medalist, was born in Datteln. Notable people * Horst Niggemeier (1929–2000), politician, mayor of Datteln * Reinhard Lettmann (1933–2013), bishop of Münster (1980–2008) * Egon Ramms (born 1948), General, 2007–2010 commander at NATO * Klaus Eberhard (born 1957), director of Sport of German Tennis Federation and former tennis player * Ingo Anderbrügge (born 1964), football player and coach * Katja Seizinger (born 1972), World Cup alpine ski racing champion; three times the ''Sportswoman of the Year'' * Dunja Hayali (born 1974), journalist a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Safety Measures
Safety is the state of being "safe", the condition of being protected from harm or other danger. Safety can also refer to the control of recognized hazards in order to achieve an acceptable level of risk. Meanings There are two slightly different meanings of ''safety''. For example, ''home safety'' may indicate a building's ability to protect against external harm events (such as weather, home invasion, etc.), or may indicate that its internal installations (such as appliances, stairs, etc.) are safe (not dangerous or harmful) for its inhabitants. Discussions of safety often include mention of related terms. Security is such a term. With time the definitions between these two have often become interchanged, equated, and frequently appear juxtaposed in the same sentence. Readers unfortunately are left to conclude whether they comprise a redundancy. This confuses the uniqueness that should be reserved for each by itself. When seen as unique, as we intend here, each term will a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle Strength
Skeletal muscles (commonly referred to as muscles) are Organ (biology), organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as Skeletal muscle#Skeletal muscle cells, muscle fibers. The muscle tissue of a skeletal muscle is striated muscle tissue, striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple muscle fascicle, fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Skier Rising Out Of Water
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food, energy or organic micronutrients. Its chemical formula, H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H2O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water cover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sit-down Hydrofoil
The sit-down hydrofoil, first developed in the late 1980s, is a variation on water skiing, a popular water sport. When towed at speed, by a powerful boat or some other device, the board of the hydrofoil 'flies' above the water surface and generally avoids contact with it, so the ride is largely unaffected by the wake or chop of the water and is relatively smooth. The air board is a modified hydrofoil where the skier stands up. History Hydrofoils date back the early 1900s, however they were not part of a recreational sport. While the first hydrofoil boat was created in 1906 by Italian inventor Enrico Forlanini, the first waterski hydrofoil was invented in the early 1960s by Walter Woodward, an aeronautical engineer, with two skis attached to a bi-wing hydrofoil. In 1972, Mike Murphy and Bob Woolley added a bi-wing hydrofoil to a surfing kneeboard, then reduced the bi-wing to a single wing. Murphy and Bob Woolley then applied the concept to sit-down hydrofoil, with Woolley riding th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kneeboarding (towsport)
Kneeboarding is an aquatic sport where the participant is towed on a buoyant, convex, and hydrodynamically shaped board at a planing speed, most often behind a motorboat. Kneeboarding on a surf style board with fin(s) is also done in waves at the beach. In the usual configuration of a tow-sport kneeboard, riders kneel on their heels on the board, and secure themselves to the deck with an adjustable Velcro strap over their thighs. Most water ski kneeboards do not have fins to allow for easier surface spins. As in wakeboarding or water skiing, the rider hangs onto a tow-rope. The advantages of kneeboarding versus other tow-sports seems to be an easier learning curve and a sense of being closer to the water when falls occur. History Kneeboards were first produced commercially in the 1970s. While they were not widely popular at first, kneeboarding had become widespread by the mid-1970s. Today, kneeboarding remains popular, with sales of about 100,000 units per year. As waterskiing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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