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The sport of sailing involves a variety of competitive sailing formats that are sanctioned through various sailing federations and yacht clubs . Racing disciplines include matches within a fleet of sailing craft, between a pair thereof or among teams. Additionally, there are specialized competitions that include setting speed records. Racing formats include both closed courses and point-to-point contests; they may be in sheltered waters, coast-wise or on the open ocean. Most competitions are held within defined classes or ratings that either entail one type of sailing craft to ensure a contest primarily of skill or rating the sailing craft to create classifications or handicaps .

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71-472: The International 14 is an International racing sailboat , crewed by two sailors . The class was established in 1928. The boat is a developmental sailing class and so the design rules and the boats themselves have changed dramatically over time to keep the International 14 at the leading edge of sailing technology. Many designers have contributed to the boat. Sailboatdata.com noted "the International 14

142-577: A moon pool between the hulls. Two Cold War-era submarine rescue ships , USS Pigeon and USS Ortolan of the US Navy , were also catamarans, but did not have the moon pool feature. The use of catamarans as high-speed naval transport was pioneered by HMAS Jervis Bay , which was in service with the Royal Australian Navy between 1999 and 2001. The US Military Sealift Command now operates several Expeditionary Fast Transport catamarans owned by

213-408: A boat. Choosing a catamaran offers increased speed at the expense of reduced load per unit of cost. Howard and Doane describe the following tradeoffs between cruising monohulls and catamarans: A long-distance, offshore cruising monohull may be as short as 30 feet (9.1 m) for a given crew complement and supporting supplies, whereas a cruising catamaran would need to be 40 feet (12 m) to achieve

284-748: A century of construction. Today it is built by Ovington Boats and Composite Craft in the United Kingdom. From 1946 to 1970 it was built in the United States by the W. D. Schock Corp , with 26 boats completed over that 24-year period. It was also at one time built by the Henderson Boat Company in North America and China New Yachts in China. Before the class was formally established in 1928, many designers built open class 14 foot racing boats that were

355-414: A conventional catamaran. They are distinguished from SWATH catamarans, in that the buoyant part of the hull is not tubular. The spanning bridge deck may be configured with some of the characteristics of a normal V-hull, which allows it to penetrate the crests of waves. Wave-piercing catamaran designs have been employed for yachts, passenger ferries, and military vessels. A catamaran configuration fills

426-405: A few minutes to a few hours. All sorts of sailing craft are used for these races, including keel-boats of all sizes, as well as dinghies, trailer sailors , catamarans , skiffs, sailboards, and other small craft. This kind of race is most commonly run over one or more laps of a triangular course marked by a number of buoys. The course starts from an imaginary line drawn from a 'committee boat' to

497-565: A hero's welcome in France. In 1939, he published his experiences in a book, Kaimiloa , which was translated into English in 1940. Roland and Francis Prout experimented with catamarans in 1949 and converted their 1935 boat factory in Canvey Island , Essex (England), to catamaran production in 1954. Their Shearwater catamarans easily won races against monohulls. Yellow Bird, a 1956-built Shearwater III , raced successfully by Francis Prout in

568-405: A higher efficiency per unit of payload for monohulls. Two advances over the traditional catamaran are the small-waterplane-area twin hull (SWATH) and the wave-piercing configuration—the latter having become a widely favored design. SWATH reduces wave-generating resistance by moving displacement volume below the waterline, using a pair of tubular, submarine-like hulls, connected by pylons to

639-400: A lattice scaffold. The frame of the tourist catamaran can be made of both aluminum (duralumin) pipes and from felled tree trunks. The inflatable part has two layers—an airtight balloon with inflation holes and a shell made of dense tissue, protecting the balloon from mechanical damage. Advantages of such catamarans are light weight, compactness and convenience in transportation (the whole product

710-513: A monohull, and can give reduced wakes. Catamarans were invented by the Austronesian peoples , and enabled their expansion to the islands of the Indian and Pacific Oceans . Catamarans range in size from small sailing or rowing vessels to large naval ships and roll-on/roll-off car ferries. The structure connecting a catamaran's two hulls ranges from a simple frame strung with webbing to support

781-600: A multihull steel vessel named Binave (Twin Ship), a new type of catamaran which was constructed and tested in Bilbao ( Spain ) in 1918. The innovative design included two 30 HP Hispano-Suiza marine engines and could modify its configuration when sailing , positioning two rudders at the stern of each float, with the propellers also placed aft . In 1936, Eric de Bisschop built a Polynesian "double canoe" in Hawaii and sailed it home to

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852-400: A niche where speed and sea-kindliness is favored over bulk capacity. In larger vessels, this niche favors car ferries and military vessels for patrol or operation in the littoral zone. Recreational and sport catamarans typically are designed to have a crew of two and be launched and landed from a beach. Most have a trampoline on the bridging structure, a rotating mast and full-length battens on

923-560: A number of hours. The longest offshore races involve a circumnavigation of the world. Some of the most famous offshore races are as follows Several fully crewed round-the-world races are held, including: South African yacht clubs organise the South Atlantic Race (the former Cape to Rio race), the Governor's Cup from Cape Town to St. Helena Island, and a race between Durban and Mauritius. Single-handed ocean yacht racing began with

994-572: A seaway. The Swiss-registered wave-piercing catamaran, Tûranor PlanetSolar , which was launched in March 2010, is the world's largest solar powered boat. It completed a circumnavigation of the globe in 2012. The 1970s saw the introduction of catamarans as high-speed ferries , as pioneered by Westermoen Hydrofoil in Mandal , Norway, which launched the Westamaran design in 1973. The Stena Voyager

1065-580: A sporadic lookout, due to the need to sleep, tend to navigation, etc. Certain races do not fit in the above categories. One such is the Three peaks yacht race in the UK which is a team competition involving sailing, cycling and running. Many design factors have a large impact on the speed at which a boat can complete a course, including the size of a boat's sails , its length, and the weight and shape of its hull. Because of these differences, it can be difficult to compare

1136-520: A trimaran, replacing its soft sail rig with a towering wing sail —the largest sailing wing ever built. In the waters off Valencia , Spain in February 2010, the BMW Oracle Racing trimaran with its powerful wing sail proved to be superior. This represented a break from the traditional monohulls that had always been sailed in previous America's Cup series. On San Francisco Bay, the 2013 America's Cup

1207-589: A type of single-hulled raft made of three to seven tree trunks lashed together. The term has evolved in English usage to refer to unrelated twin-hulled vessels. Catamaran-type vessels were an early technology of the Austronesian peoples . Early researchers like Heine-Geldern (1932) and Hornell (1943) once believed that catamarans evolved from outrigger canoes , but modern authors specializing in Austronesian cultures like Doran (1981) and Mahdi (1988) now believe it to be

1278-563: Is (as of 2014) the fastest passenger ship in service. The first warship to be propelled by a steam engine, named Demologos or Fulton and built in the United States during the War of 1812 , was a catamaran with a paddle wheel between her hulls. In the early 20th Century several catamarans were built as submarine salvage ships: SMS Vulkan and SMS Cyclop of Germany , Kommuna of Russia , and Kanguro of Spain , all designed to lift stricken submarines by means of huge cranes above

1349-426: Is a high performance 2-Man, development racing dinghy with a long history of performance developments that often been adopted in the design of later boats. Today, with hiking racks, a giant flat head main, and its 'skiff' like hull, an up-to-date racing model bears little resemblance to the earlier boats." The design became an international World Sailing class in 1928. The design has been built by many builders over

1420-493: Is almost entirely due to surface friction. When boat speed increases and waves are generated the resistance is dependent on several design factors, particularly hull displacement to length and hull separation to length ratio, it is a non trivial resistance curve with many small peaks as wave trains at various speeds combine and cancel For powered catamarans, this implies smaller power plants (although two are typically required). For sailing catamarans, low forward resistance allows

1491-465: Is packed in one pack-backpack, suitable for air traffic standards) and the speed of assembly (10–15 minutes for the inflation). All-inflatable models are available in North America. A cata-raft design has been used on the Colorado River to handle heavy whitewater, yet maintain a good speed through the water. Cruising sailors must make trade-offs among volume, useful load, speed, and cost in choosing

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1562-422: Is required. Catamarans typically have less hull volume, smaller displacement , and shallower draft (draught) than monohulls of comparable length. The two hulls combined also often have a smaller hydrodynamic resistance than comparable monohulls, requiring less propulsive power from either sails or motors. The catamaran's wider stance on the water can reduce both heeling and wave-induced motion, as compared with

1633-454: Is the America's Cup . The tactics involved in match racing are different from those of other races, because the objective is merely to arrive at the finish line before the opponent, which is not necessarily as fast as possible. The tactics involved at the start are also special. Team racing is most often between two teams of three boats each. It involves similar technique to match racing but has

1704-607: Is unrestricted, but 344.45 sq ft (32.000 m) is typical. The boat has a Royal Yachting Association Portsmouth Yardstick handicap of 780. The design is supported by an active class club that organizes racing events, the International 14 Class Association . There are 14 active fleets sailing in Australia, Canada, France, Germany, Japan, the UK and the US. Sailing (sport) On

1775-441: The 12 Metre being the most famous due to its involvement in the America's Cup . When all the yachts in a race are not members of the same class, then a handicap is used to adjust the times of boats. The handicap attempts to specify a "normal" speed for each boat, usually based either on measurements taken of the boat, or on the past record of that kind of boat. Each boat is timed over the specified course. After it has finished,

1846-496: The 2016 Olympics in Rio, compulsory mixed gender in the event were added for the first time. In addition the following criteria are sometimes applied to events: Catamaran A catamaran ( / ˌ k æ t ə m ə ˈ r æ n / ) (informally, a "cat") is a watercraft with two parallel hulls of equal size. The wide distance between a catamaran's hulls imparts stability through resistance to rolling and overturning; no ballast

1917-469: The Comoros , retained the twin-hull and the single outrigger canoe types, but the technology for double outriggers never reached them (although it exists in western Melanesia ). To deal with the problem of the instability of the boat when the outrigger faces leeward when tacking, they instead developed the shunting technique in sailing, in conjunction with reversible single-outriggers. Despite their being

1988-573: The Swiftsure Yacht Race , are actually a group of inshore races of various distances along overlapping courses to allow for different classes and skills. Depending on location, stability and safety equipment requirements will be more extensive than for harbor racing, but less so than for offshore racing. Different levels of requirement for navigation, sleeping cooking and water storage also apply. Offshore yacht races are held over long distances and in open water; such races usually last for at least

2059-434: The waterline length is too speed-dependent to be meaningful—as with a planing hull. It uses a reference length, the cubic root of the volumetric displacement of the hull, V , where u is the relative flow velocity between the sea and ship, and g is acceleration due to gravity : Calm water transportation efficiency of a vessel is proportional to the full-load displacement and the maximum calm-water speed, divided by

2130-526: The 1960s, is in the collection of the National Maritime Museum Cornwall . Prout Catamarans , Ltd. designed a mast aft rig with the mast aft of midships to support an enlarged jib—more than twice the size of the design's reduced mainsail; it was produced as the Snowgoose model. The claimed advantage of this sail plan was to diminish any tendency for the bows of the vessel to dig in. In

2201-536: The Tenasserim Provinces for several years". Later that century, the American Nathanael Herreshoff constructed a twin-hulled sailing boat of his own design (US Pat. No. 189,459). The craft, Amaryllis , raced at her maiden regatta on June 22, 1876, and performed exceedingly well. Her debut demonstrated the distinct performance advantages afforded to catamarans over the standard monohulls. It

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2272-555: The US Navy commissioned the construction of a SWATH ship to test the configuration. SWATH vessels compare with conventional powered catamarans of equivalent size, as follows: Wave-piercing catamarans (strictly speaking they are trimarans , with a central hull and two outriggers) employ a low-buoyancy bow on each hull that is pointed at the water line and rises aft, up to a level, to allow each hull to pierce waves, rather than ride over them. This allows higher speeds through waves than for

2343-572: The US Navy; they are used for high speed transport of military cargo, and to get into shallow ports. The Makar -class is a class of two large catamaran-hull survey ships built for the Indian Navy . As of 2012, one vessel, INS Makar (J31) , was in service and the second was under construction. First launched in 2004 at Shanghai, the Houbei class missile boat of the People's Liberation Army Navy (PLAN) has

2414-442: The added dimension that it is the overall scoring of the race that matters. In three on three team racing, this means that the team that scores ten or less points wins. For this reason, many tactics are used to advance teammates to make stable combinations for winning. The stable combinations most commonly sought are "Play one", which is 1-2-anything, "Play two" or 2-3-4, and "Play 4", a 1-4-5 combination. These are generally regarded as

2485-420: The best setups to win and the hardest for the opposing team to play offense against. Is managed by World Speed Sailing Record Council Is common to board sports. Both windsurfing and kiteboarding are experimenting with new formats. ‹The template How-to is being considered for merging .›   Harbor or buoy races are conducted in protected waters, and are quite short, usually taking anywhere from

2556-455: The boat to be considered a member of that class. Some classes (e.g.the Laser ) have very tight specifications ensuring that there is virtually no difference between the boats (except for age) - these classes are sometimes called strict one-design . In one-design racing all boats must conform to the same standard, the class rules , thus emphasizing the skill of the skipper and crew rather than having

2627-415: The box rule. No handicap is then applied. A construction class is based on a formula or set of restrictions which the boat's measurements must fit to be accepted to the class. Resulting boats are all unique, yet (ideally) relatively close in size and performance. Perhaps the most popular and enduring construction formula is The Metre Rule , around which several still popular classes were designed. With

2698-414: The bridge deck with a narrow waterline cross-section. The submerged hulls are minimally affected by waves. The SWATH form was invented by Canadian Frederick G. Creed , who presented his idea in 1938 and was later awarded a British patent for it in 1946. It was first used in the 1960s and 1970s as an evolution of catamaran design for use as oceanographic research vessels or submarine rescue ships. In 1990,

2769-490: The catamaran has an initial resistance to heeling that is seven times that of the monohull. Compared with a monohull, a cruising catamaran sailboat has a high initial resistance to heeling and capsize—a fifty-footer requires four times the force to initiate a capsize than an equivalent monohull. One measure of the trade-off between speed and carrying capacity is the displacement Froude number (Fn V ) , compared with calm water transportation efficiency . Fn V applies when

2840-521: The conduct of yacht racing, windsurfing, kitesurfing, model boat racing, dinghy racing and virtually any other form of racing around a course with more than one vessel while powered by the wind. The Barcolana regatta of the Italian yacht club Società Velica di Barcola e Grignano is currently the Guinness World Record holder as the "largest sailing race" with 2,689 boats and over 16,000 sailors at

2911-409: The corresponding power required. Large merchant vessels have a Fn V between one and zero, whereas higher-performance powered catamarans may approach 2.5, denoting a higher speed per unit volume for catamarans. Each type of vessel has a corresponding calm water transportation efficiency, with large transport ships being in the range of 100–1,000, compared with 11-18 for transport catamarans, denoting

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2982-448: The crew to a bridging superstructure incorporating extensive cabin or cargo space. Catamarans from Oceania and Maritime Southeast Asia became the inspiration for modern catamarans. Until the 20th century catamaran development focused primarily on sail-driven concepts. The word "catamaran" is derived from the Tamil word, kattumaram (கட்டுமரம்), which means "logs bound together" and is

3053-414: The designated 'starting' buoy or 'pin'. A number of warning signals are given telling the crews exactly how long until the race starts. The aim of each crew is to cross the start line at full speed exactly as the race starts. A course generally involves tacking upwind to a 'windward' marker or buoy. Then bearing away onto a downwind leg to a second jibe marker. Next another jibe on a second downwind leg to

3124-442: The forerunners of the official class. In 1923 Uffa Fox built his first 14-foot racer and by 1925 was creating designs for them. Fox introduced the first planing hull-equipped 14, named Avenger , in 1927. The International 14 is a racing sailing dinghy . Over time the hulls have mostly been built from wood, glassfibre and more recently, carbon fibre reinforced polymer , although under class rules any materials are permitted for

3195-504: The handicap is used to adjust each boat's finishing time. The results are based on this sum. Popular handicapping systems include Earlier popular rating systems include IOR and IMS . The majority of sailing events are "open" events in which males and females compete together on equal terms either as individuals or part of team. Sailing has had female only World Championships since the 1970s to encourage participation and now hosts more than 30 such World Championship titles each year. For

3266-424: The hull. Modern boats built to the current Bieker 6 rules typically have a fractional sloop rig with carbon fibre spars; a plumb stem and transom ; a transom-hung, hydrofoil-equipped rudder controlled by a tiller with an extension and a retractable centreboard . Hiking racks are also fitted, along with fully- battened mainsails . Carbon fibre boats typically displace 154 lb (70 kg). The class

3337-512: The last mark which is called the 'downwind mark' (or 'leeward mark'). At this mark the boats turn into wind once again to tack to the finish line. The most famous and longest running of these events are: Inshore racing is yacht racing not in protected waters but along and generally within sight of land or from land to nearby islands, as distinct from offshore racing across open water and oceans. The duration of races may be daylight only, overnight or passage races of several days. Some races, such as

3408-399: The mainsail. Performance versions often have trapezes to allow the crew to hike out and counterbalance capsize forces during strong winds on certain points of sail. For the 33rd America's Cup , both the defender and the challenger built 90-foot (27 m) long multihulls. Société Nautique de Genève , defending with team Alinghi , sailed a catamaran. The challenger, BMW Oracle Racing, used

3479-563: The mid-twentieth century, beachcats became a widespread category of sailing catamarans, owing to their ease of launching and mass production. In California, a maker of surfboards , Hobie Alter , produced the 250-pound (110 kg) Hobie 14 in 1967, and two years later the larger and even more successful Hobie 16 . As of 2016, the Hobie 16 was still being produced with more than 100,000 having been manufactured. Catamarans were introduced to Olympic sailing in 1976. The two-handed Tornado catamaran

3550-473: The more "primitive form" of outrigger canoes, they were nonetheless effective, allowing seafaring Polynesians to voyage to distant Pacific islands . The following is a list of traditional Austronesian catamarans: The first documented example of twin-hulled sailing craft in Europe was designed by William Petty in 1662 to sail faster, in shallower waters, in lighter wind, and with fewer crew than other vessels of

3621-405: The opposite. Two canoes bound together developed directly from minimal raft technologies of two logs tied together. Over time, the twin-hulled canoe form developed into the asymmetric double canoe, where one hull is smaller than the other. Eventually the smaller hull became the prototype outrigger , giving way to the single outrigger canoe, then to the reversible single outrigger canoe. Finally,

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3692-521: The present-day Velux 5 Oceans Race (formerly the BOC Challenge / Around Alone) and the Vendée Globe . Single-handed racing has seen a great boom in popularity in recent years. There is some controversy about the legality of sailing single-handed over long distances, as the navigation rules require "that every vessel shall at all times maintain a proper lookout..."; single-handed sailors can only keep

3763-671: The race across the Atlantic Ocean by William Albert Andrews and Josiah W. Lawlor in 1891; however, the first regular single-handed ocean race was the Single-Handed Trans-Atlantic Race , first held in 1960. The first round-the-world yacht race was the Sunday Times Golden Globe Race of 1968–1969, which was also a single-handed race with the only winner, Robin Knox-Johnston on Suhaili ; this inspired

3834-443: The racing versions recording well over 400 nautical miles (460 mi; 740 km) per day. In addition, they do not heel more than 10-12 degrees, even at full speed on a reach. Powered cruising catamarans share many of the amenities found in a sail cruising catamaran. The saloon typically spans two hulls wherein are found the staterooms and engine compartments. As with sailing catamarans, this configuration minimizes boat motion in

3905-414: The regatta. Although often both adults and juniors sail the same classes of boat. Fleet races can have anywhere from four boats to hundreds of boats in a race. A regatta must have at least three races to be counted. Each boat's place in each race is added to compile a final score. The lowest scorer wins. In match racing only two boats compete against each other. The best known competition of this type

3976-530: The results depend on equipment superiority. This kind of class is most commonly with a brand, as occurs with Laser Performance , RS Sailing , Melges and J/Boats . Popular International Classes include the Optimist , 470 , Snipe and Etchells . A box rule specifies a maximum overall size for boats in the class, as well as features such as stability. Competitors in these classes are then free to enter their own boat designs, as long as they do not exceed

4047-410: The sails to derive power from attached flow , their most efficient mode—analogous to a wing—leading to the use of wingsails in racing craft. Catamarans rely primarily on form stability to resist heeling and capsize. Comparison of heeling stability of a rectangular-cross section monohull of beam, B , compared with two catamaran hulls of width B /2, separated by a distance, 2× B , determines that

4118-439: The same capacity. In addition to greater speed, catamarans draw less water than do monohulls— as little as 3 feet (0.91 m) —and are easier to beach. Catamarans are harder to tack and take up more space in a marina. Cruising catamarans entail added expense for having two engines and two rudders. Tarjan adds that cruising catamarans boats can maintain a comfortable 300 nautical miles (350 mi; 560 km) per day passage, with

4189-558: The single outrigger types developed into the double outrigger canoe (or trimarans ). This would also explain why older Austronesian populations in Island Southeast Asia tend to favor double outrigger canoes, as it keeps the boats stable when tacking . But they still have small regions where catamarans and single-outrigger canoes are still used. In contrast, more distant outlying descendant populations in Oceania , Madagascar , and

4260-408: The skills of the sailors in a race if they are sailing very different boats. For most forms of yacht racing, one of two solutions to this problem are used: either all boats are required to race on a first to finish basis (these groups of boats are called classes), or a handicapping system is used which implements correction factors. Each class has a detailed set of specifications that must be met for

4331-652: The starting line. The International Olympic Committee recognizes World Sailing (WS) as the world governing body for the sport of sailing yacht racing. It was formed in 1904 as the International Yacht Racing Union and then called the International Sailing Federation until rebranding 2014. Many town yacht clubs maintain their own racing teams for both juniors and adults. Often several yacht clubs will get together to hold events that can include more than 100 entered boats per race making up

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4402-587: The time. However, the unusual design met with skepticism and was not a commercial success. The design remained relatively unused in the West for almost 160 years until the early 19th-century, when the Englishman Mayflower F. Crisp built a two-hulled merchant ship in Rangoon, Burma . The ship was christened Original . Crisp described it as "a fast sailing fine sea boat; she traded during the monsoon between Rangoon and

4473-424: The water and greater stability (initial resistance to capsize). Choosing between a monohull and catamaran configuration includes considerations of carrying capacity, speed, and efficiency. At low to moderate speeds, a lightweight catamaran hull experiences resistance to passage through water that is approximately proportional to its speed. A displacement monohull has the same relationship at low speed since resistance

4544-641: The water, a sailing competition among multiple vessels is called a regatta . A Regatta consists of multiple individual races. The boat crew that performs best in over the series of races is the overall winner. There is a broad variety of kinds of races and sailboats used for racing from large yacht to dinghy racing . Much racing is done around buoys or similar marks in protected waters, while some longer offshore races cross open water. Various kinds of boats are used for racing, including small dinghies , catamarans , boats designed primarily for cruising , and purpose-built raceboats. The Racing Rules of Sailing govern

4615-590: The water. Virtually all of the new mega-cats were built of pre-preg carbon fiber for strength and the lowest possible weight. The top speeds of these boats can approach 50 knots (58 mph; 93 km/h). The Race was won by the 33.50 m (109.9 ft)-long catamaran Club Med skippered by Grant Dalton . It went round the globe in 62 days at an average speed of 18 knots (21 mph; 33 km/h). Whitewater catamaran—sometimes called "cata-rafts"—for whitewater sports are widely spread in post-Soviet countries . They consists of two inflatable hulls connected with

4686-411: Was a circumnavigation challenge which departed from Barcelona, Spain, on New Year's Eve, 2000. Because of the prize money and prestige associated with this event, four new catamarans (and two highly modified ones) over 100 feet (30 m) in length were built to compete. The largest, PlayStation , owned by Steve Fossett , was 125 feet (38 m) long and had a mast which was 147 feet (45 m) above

4757-432: Was an example of a large, fast ferry, typically traveling at a speed of 46 miles per hour (74 km/h), although it was capable of over 70 miles per hour (110 km/h). The Australian island Tasmania became the site of builders of large transport catamarans— Incat in 1977 and Austal in 1988 —each building civilian ferries and naval vessels. Incat built HSC Francisco , a High-Speed trimaran that, at 58 knots,

4828-661: Was as a result of this event, the Centennial Regatta of the New York Yacht Club, that catamarans were barred from regular sailing classes, and this remained the case until the 1970s. On June 6, 1882, three catamarans from the Southern Yacht Club of New Orleans raced a 15 nm course on Lake Pontchartrain and the winning boat in the catamaran class, Nip and Tuck , beat the fastest sloop's time by over five minutes. In 1916, Leonardo Torres Quevedo patented

4899-465: Was one of the first to allow a trapeze , adopted in 1938. A second trapeze was permitted starting in 1984, due to the large amount of sail carried on boats of that period. In 1996 the International version and the Australian models were merged into a single class. For sailing downwind the design may be equipped with an asymmetrical spinnaker , flown from a long carbon fibre bowsprit . The spinnaker size

4970-486: Was sailed in 72-foot (22 m) long AC72 catamarans (craft set by the rules for the 2013 America's Cup). Each yacht employed hydrofoils and a wing sail. The regatta was won 9–8 by Oracle Team USA against the challenger, Emirates Team New Zealand , in fifteen matches because Oracle Team USA had started the regatta with a two-point penalty. Yachting has seen the development of multihulls over 100 feet (30 m) in length. " The Race " helped precipitate this trend; it

5041-707: Was selected for the multihull discipline in the Olympic Games from 1976 through 2008. It was redesigned in 2000. The foiling Nacra 17 was used in the Tokyo 2020 Olympics, which were held in 2021; after the 2015 adoption of the Nacra 15 as a Youth World Championships class and as a new class for the Youth Olympic Games. Catamarans have two distinct primary performance characteristics that distinguish them from displacement monohull vessels: lower resistance to passage through

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