Quarter Ton Class is an offshore sailing class of the
International Offshore Rule
The International Offshore Rule (IOR) was a measurement rule for racing sailboats. The IOR evolved from the Cruising Club of America (CCA) rule for racer/cruisers and the Royal Ocean Racing Club (RORC) rule.
Rule context - past and present rating ...
racing the
Quarter Ton Cup
The Quarter Ton Cup is a sailing trophy awarded to the winners of the world Quarter Ton class Quarter Ton Class is an offshore sailing class of the International Offshore Rule racing the Quarter Ton Cup between 1967 and 1996 and from 2005 till now ...
between 1967 and 1996 and from 2005 till now. The class is sailed by smaller keelboats of similar size and is likely the world's most produced keelboat class.
History
This sailing class has held world championships from 1967 until 1997. In 2005 there was a revival of the quarter ton class started in Cowes and they sailed under IRC Quarter Ton Cup rules from 2005 until now.
An annual Dutch Quarterton Cup under ORC was started in 2013. In France and Ireland there are also races for Quarter Ton boats.
Boats

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Accent 26
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Albin 79
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Cal T/4
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D&M 22
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Ericson 25
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Farr 727
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Northern 1/4 Ton
The Northern 1/4 Ton is a Canadian sailboat, that was designed by Cuthbertson & Cassian as an International Offshore Rule Quarter Ton class racer and first built in 1972.
The Northern 1/4 Ton design was developed into the Mirage 24 by Cuthber ...
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North Star 500
The North Star 500 is a Canadian trailerable sailboat that was designed by the American firm of Sparkman & Stephens as an International Offshore Rule Quarter Ton class racer and first built in 1973. The boat was Sparkman & Stephens' design #2 ...
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Ranger 23
The Ranger 23 is an American trailerable sailboat, that was designed by Gary Mull as an International Offshore Rule quarter-ton racer.Sherwood, Richard M.: ''A Field Guide to Sailboats of North America, Second Edition'', pages 120-121. Hought ...
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San Juan 24
The San Juan 24 is an American trailerable sailboat that was designed by Bruce Kirby as an International Offshore Rule Quarter Ton class racer.Henkel, Steve: ''The Sailor's Book of Small Cruising Sailboats'', page 261. International Marine/M ...
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Santana 525
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Tanzer 22
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Yamaha 26
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Yankee 26
See also
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Mini Ton class
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Half Ton class
Half Ton class was an offshore sailing class of the International Offshore Rule racing the Half Ton Cup between 1967 and 1993.
History
In order that yachts of different types can race against each other, there are handicap rules which are appl ...
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Three-Quarter Ton class Three-Quarter Ton class was an offshore sailing class of the International Offshore Rule racing the Three-Quarter Ton Cup between 1974 and 1994.1994 October ''Yachting World'': "One Ton Cup, The Most Competitive Trophy", p.88-89
Boats
* C&C 3/4 T ...
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One Ton class
One Ton class was an offshore sailing class, which raced for the One Ton Cup, of the RORC 22 foot rule between 1965 and 1970, and then the International Offshore Rule between 1971 and 1994. The IOR rated length was 27.5' from 1971 to 1982, then i ...
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Midget Ocean Racing Club
The Midget Ocean Racing Club (MORC) is an American association based in Severna Park, Maryland, that promotes and organizes ocean racing for small sailboats under a handicapping rule.
History
Founded in 1954, the club was formally organized a ...
References
{{Reflist
Development sailing classes
Keelboats