ISO is an

International Sailing Federation International is an adjective (also used as a noun) meaning "between nations". International may also refer to: Music Albums * ''International'' (Kevin Michael album), 2011 * ''International'' (New Order album), 2002 * ''International'' (The T ...

(ISAF) class of two-person

sailing Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, windsurfer, or kitesurfer), on ''ice'' (iceboat) or on ''land'' ( land yacht) over a chose ...

dinghy A dinghy is a type of small boat, often carried or towed by a larger vessel for use as a tender. Utility dinghies are usually rowboats or have an outboard motor. Some are rigged for sailing but they differ from sailing dinghies, whic ...

with a single

trapeze A trapeze is a short horizontal bar hung by ropes or metal straps from a ceiling support. It is an aerial apparatus commonly found in circus performances. Trapeze acts may be static, spinning (rigged from a single point), swinging or flying, an ...

and an asymmetric

spinnaker A spinnaker is a sail designed specifically for sailing off the wind on courses between a reach (wind at 90° to the course) to downwind (course in the same direction as the wind). Spinnakers are constructed of lightweight fabric, usually ny ...

. The ISO was designed in 1993 by Ian Howlett and John Caig and manufactured by

Reg White Reginald James White (28 October 1935 – 27 May 2010), usually Reg White, was an English boat builder, sailor, Olympic champion and world champion. He won a gold medal in the '' Tornado class'' with John Osborn at the 1976 Summer Olymp ...

Limited of

Brightlingsea Brightlingsea is a coastal town and an electoral ward in the Tendring district of Essex, England. It is situated between Colchester and Clacton-on-Sea, at the mouth of the River Colne, on Brightlingsea Creek. At the 2011 Census, it had a pop ...

as part of the "White Formula" range of boats originally marketed by Topper International Ltd and since 2013 by Vantage Sailing Ltd. The boat has a fully battened mainsail, jib and an asymmetric

. The name ISO reflects a feature of the design that allows different sized crews to compete on an equal basis. This is achieved by a crew weight equalisation system consisting of removable wings. The wings may not be used if the trapezing crew weighs more than 78kg (to equalise righting moment) and must be used if the combined helm and crew weight is less than 135kg (to equalise weight in the boat). If neither of these mandatory rules apply the crew may choose whether or not to use wings but may not change this decision during a race series. Around 700 boats have been built with sail numbers starting at 501. The ISO is designed to be a relatively easy boat to sail for its performance level. It belongs to the racing skiff category. In the UK the ISO Class Association is affiliated to the Royal Yachting Association (RYA).

References

Dinghies Former classes of World Sailing {{ship-type-stub