International One Design

International One Design
Current specifications
An IOD racer on Hamilton Harbour, Bermuda, in 2006.
LOA	10 m (33 ft)
LWL	6.6 m (21.5 ft)
Beam	2.1 m (6.9 ft)
Draft	1.6 m (5.4 ft)
Development
Designer	Bjarne Aas
Former International class

The International One Design (IOD, International) is a class of sail boat developed for yacht racing. It is a 33-foot open cockpit day sailer used for day racing, rather than for overnight or ocean races. Popularised prior to the Second World War, the International One Design class is considered a classic one today.

Origin

The International class sloop was created by the legendary American yachtsman, Cornelius Shields as he sought to create a new one design yacht for the Amorita Cup series of team races between Bermuda and Long Island Sound. While in Bermuda one spring, he looked out at the beautiful Bermudian 6-Meter, Saga, owned by Eldon and Kenneth Trimingham, and knew instantly that he had seen the prototype of a beautiful racing class that would stand the test of time.^[1]

Inspired by the beauty of this Six Metre yacht, and its performance, Shields envisioned using it as the basis of a one design racing class that would have the advantages of both limiting the upwardly-spiraling costs of yacht racing, and putting competing crews on an equal footing as far as equipment was concerned.

Shields commissioned Saga's designer-builder, Bjarne Aas of Fredrikstad, Norway, to develop plans for a one-design version of Saga. He negotiated with Aas to reduce the size of the Saga's design to produce a 33 foot (10 m) racer. The resulting design was smaller than the Saga, with less displacement, but greater beam of 6 ft 9 in (2.06 m). It measured 21 ft 5 in (6.53 m) in at the waterline, and had a draft of 5 ft 4 in (1.63 m), and displaced 7,120 lb (3,230 kg). The mast was 45 ft (13.72 m), carrying 426 square feet (40 m²) of sail. The design of the boat is what is known as a Bermuda sloop, or a Marconi sloop, being single-masted, and Bermuda rigged. The result is a beautiful reminder of yachting's "golden age" with the traditional metre-boat's long overhangs, graceful sheer, deep, narrow hull and lofty rig.

An IOD sloop and a 19th Century Bermudian working boat in Bermuda

The cost of an IOD in 1936 was $2,670. Sails, spars, running rigging, cradle, insurance, and shipping charges from Norway were included in the price. With the backing of the enthusiastic Shields, the boat was quickly adopted by the top racers on Long Island Sound.^[2] The first of the initial order of 25 yachts was delivered at City Island, New York in December 1936. "I finally arranged to sail her the week after Christmas...the first time anyone had sailed an International,” recalled Shields, many years later. “I don't think I've ever had a more joyous day on the water. The wind was from the northeast, light in the morning and then stronger at mid-day, so we had a chance to try her out under a variety of conditions. The boat was a delight to handle, and balanced perfectly. I felt great satisfaction at this -- the planning and hope and care hadn't been in vain."

The Internationals quickly spread. Bermuda took delivery of seven in January 1937. The next year fleets were established in Marblehead, Massachusetts and Northeast Harbor, Maine, followed by fleets in Norway and Cowes. During the war, legend says that Aas buried the construction jigs to protect them during the Nazi occupation. After the liberation of Norway, construction resumed at Fredrikstad with boats going to San Francisco, Sweden, France, Oyster Bay, and Cowes. Fiberglass construction was introduced in the 1960s with great care taken by the class to ensure that the wood and glass yachts could race on an equal basis. Today, there are ten fleets racing around the world—Bermuda, Norway (combined fleets -- Oslo & Tønsberg), the United Kingdom (St. Mawes, Falmouth), Sweden (Stenungsund), New York (two fleets -- Larchmont and Fishers Island), Maine (Northeast Harbor), Massachusetts (two fleets -- Marblehead and Nantucket) and California (San Francisco Bay). The newest IOD fleet is in Chester, Nova Scotia.

Most recently, IODs were the first class awarded International Classic Yacht status by the International Sailing Federation (ISAF).

Racing

IOD Racing commenced on Long Island Sound during the summer of 1937. The very first trophy awarded for and IOD race was won by Allegra Knapp, sister to famed American sailor Arthur Knapp. Shields' determination to keep the competition on a man-to-man basis maintained the high quality of racing from the beginning. Soon there were thirty five IODs racing in Long Island Sound. The class took hold in and was used for the first ever competition for the Amorita Cup. In the next 28 matches, from then to 1964, held to compete for the cup (21 in Bermuda, and 8 on Long Island Sound), the Americans won 13 times, and the Bermudians 16.

Today IODs are actively raced in ten local fleets in America and Europe. Representatives of those fleets annually compete in a World Championship (the venue of which rotates between the fleets), a North American Championship, Bermuda Race Week, the Nantucket Invitational, a European Championship and occasional Team-racing championships hosted by individual fleets. Yachts from the International One Design class are used for the annual Bermuda Gold Cup as part of the professional World Match Racing Circuit.

Recent world champions are: 2011 held in Marblehead -- Elliott Wislar representing Long Island Sound, 2010 held in Northeast Harbor -- Elliott Wislar representing Long Island Sound, 2009 held in Sweden – Urban Ripstorp representing Sweden, 2008 held in San Francisco – Charlie Van Voorhis representing Fishers Island, 2007 held in Nantucket – Charlie Van Voorhis representing Fishers Island, 2006 held Long Island Sound – Tony Huston representing Long Island Sound. The 2012 Worlds are to be help in Bermuda with 2 time winner Elliott Wislar defending his title.

One-design principles

Since its founding, the International Class has remained committed to the tradition of testing sailing skills in equally equipped yachts. The Class' extensive one-design rules endeavor to ensure that the hulls, rigs and sails of the racing yachts are near equal as possible. All International owners agree to honor this Class principle.

With any racing yacht, the largest contributor to variable costs are the sails. A boat with newer sails will almost always have a greater speed potential than a boat with older sails of the same design. To keep costs low and ensure that each boat is racing with the most equal sails possible, the IOD class has evolved a very specific sail purchase program that is required to be implemented by each local fleet. The Class encourages each local fleet to develop sails for their boats that suit the specific characteristics of their local sailing area.

Unlike many other one-design fleets, however, individual boats, are not granted free license on how frequently they replace their sails. Instead, each local fleet votes each year on what sail, if any, will be purchased before a given season. The chosen sail (mainsail, jib or spinnaker) is ordered in a single lot from the local fleet's official sailmaker, who pledges to make them as near equal as possible. No recutting, or use of alternate sails is permitted. Usually fleets adopt a sail purchase schedule that only requires the purchase of one sail per year. The result of this unique sail purchase program is a racing fleet of equally equipped boats that are maintained at a low cost to the individual owners.

To further equalize the playing field during International and Interfleet regattas, a change-boat series is presented by the host fleet. Competitors do not bring their own boats to such an event, rather they are invited to sail in the boats of the host fleet. Boats are rotated after every race, or at some events, each day. To make sure that no competing team gain an advantage through this process, the boats are distributed by random drawing and any local representative is prohibited, by rule, from sailing their own boat.

Class organization

In 1946, Bill John, William S. Cox, George Hinman, Arthur Knapp Jr., A.E. "Bill" Luders Jr., Emil Mosbacher Jr. and Roderick Stephens Jr. codified the ethos of the class to prevent it moving away from its intended single design nature. This was achieved partly by ensuring only the original builder could produce boats for the class. Today, there are two authorised builders of boats for this class: Tjorns Yacht Service, in Sweden, and C.W.Hood Yachts, in Marblehead, Massachusetts. The most recent all wooden IOD, built from the original 1936 drawings, was constructed in 2009 by Tern Boatworks, in Chester, Nova Scotia. The class was overseen by a five-man class committee (headed by Shields until 1960). The committee was as responsible for publicizing the class as regulating it.

IODs were the first class awarded International Classic Yacht status by the International Sailing Federation (ISAF).

References

↑ Shields, Cornelius (1974). Racing with Cornelius Shields and the masters. Upper Saddle River, New Jersey: Prentice-Hall. p. 50. ISBN 0-13-750224-9.
↑ Farnham, Moulton H. "IODs - The BIG Little Class". Motor Boating. Retrieved 2011-09-27.

External links

Classes of the International Sailing Federation

Current Olympic classes	470 49er 49er FX Finn Laser Laser Radial RS:X Nacra 17

ISAF centreboard classes	29er 420 505 B14 Byte Cadet Contender Enterprise Europe Fireball Flying Dutchman Flying Junior GP14 Int. 14 Laser 2 Laser 4.7 Lightning Mirror Moth Musto Performance Skiff O'pen BIC OK Dinghy Optimist RS Feva RS Tera RS100 RS500 Snipe Splash Sunfish Tasar Topper Vaurien Zoom 8

ISAF keelboat classes	12 mR 2.4 mR 5.5 m 6 mR 8 mR Dragon Etchells Flying 15 Hansa 2.3 Hansa 303 Hansa Liberty H-boat J/22 J/24 J/70 J/80 Melges 20 Melges 24 Melges 32 Micro Platu 25 RC44 SB20 Shark 24 Soling Sonar Star Tempest Yngling

ISAF yacht classes	Class40 Farr 30 (Mumm 30) Farr 40 IMOCA 60 J/111 Maxi 72 Soto 40 Swan 45 Swan 60 TP 52 X-35 X-41

ISAF multihull classes	A-Class Dart 18 Formula 16 Formula 18 Hobie 14 Hobie 16 Hobie Dragoon Hobie Tiger Hobie Wildcat Nacra Infusion SL 16 Topcat K1 Tornado Viper F16

ISAF windsurfer classes	Formula Experience Formula Windsurfing Funboard Kona Mistral Raceboard RS:One Speed Windsurfing Techno 293

ISAF kiteboarding classes	International Kiteboarding Association

International Radio Sailing Association classes	10 rater A Class Marblehead One Metre

Former ISAF classes	11:Metre One Design 29erXX Aloha Buzz C-Class Division I Division II Division III Elliott 6m Farr 45 Farr Maxi One Design Hobie 17 Hobie 18 IOD ISO Laser Vago Lechner A-390 Mistral Junior Mumm 36 Nacra F18 Open 50 ORMA 60 Sydney 40 Ultimate 20 Windglider X-99

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