420 (dinghy)#World Championships

The International 420 was designed by Christian Maury in France in the year 1959. The class developed rapidly in France, being adopted nationally as a youth trainer for the larger Olympic class International 470. By the late 1960s the class was adopted by a few UK university sailing clubs for training and team racing.

File:420 Class Dinghies with spinnakers.jpg

The class adopted a policy of "prudent evolution" so as to allow development without making existing dinghies obsolete. The hull's seaworthiness and stability at speed proved to be better than most of its contemporaries, and this together with its modest sail area make it fun to sail in heavy weather and thus an excellent youth trainer, qualities that led to its adoption for that role by the Royal Yachting Association in the mid-1970s. In addition, the international 420 is known for its inherent lightness. The floatability of the boat made for a safer training vessel.{{Cite web |title=Introduction to the 420 - 420 Sailing |url=https://www.420sailing.org/content/introduction-to-the-420 |access-date=2022-08-07 |website=www.420sailing.org}}

With its trapeze and spinnaker it provides the capability for advanced sailing techniques for international standard sailors, while still remaining affordable and accessible to beginners. The International 420 maintains a large multinational class association. The combination of effective class management, the boat's inherent sailing qualities, and prudent evolution have contributed to the class's continuing success.

The Club 420, or C420,{{Cite web| url=https://chesteryachtclub.ca/?page_id=1040| title=Boat Classes {{!}} Chester Yacht Club| website=chesteryachtclub.ca| language=en-US| access-date=2017-10-24| archive-url=https://web.archive.org/web/20171025022602/https://chesteryachtclub.ca/?page_id=1040| archive-date=2017-10-25| url-status=dead}} is a derivative of the 420 and is not recognized by World Sailing or the International 420 Class Association. Designed by Vanguard boats in the 1970s, it has a heavier hull, reinforced for durability in institutional sailing, and a stiff, untapered mast. The boat is much more simple to sail, yet lacks the performance of the original dinghy due to its extra weight. The Club 420 is used extensively on the youth race circuit in the US, with over 5,000 boats in North America,{{Cite web|url=https://club420.org/|title=The C420 Association|website=Club420.org}} but is not sailed in most other countries. It cannot be used at I420 class events.

The Z420 is a transformation of the Club 420. The Z420 hull is {{convert|50|lb|kg}} lighter and 40 percent stiffer than the C420. Whereas a C420 hull is composed of six pieces, the Z420 has only three molded components: the hull, the deck, and the mast partners. Unlike the C420, the Z420 does not include a spinnaker or trapeze in its rigging. Z420 boats are specially designed for college sailing and were used at the Inter-Collegiate Sailing Association National Championships in 2014 for the first time.{{Cite web| url=https://www.sailingworld.com/sailboats/z420-new-school-dinghy/| title=Z420: New School Dinghy| website=Sailing World| language=en-US}}

{{main|420 World Championships}}

Held every year since 1973 organized by the International 420 Class Association and recognised by World Sailing.

Three fleets current race separately which are the Male & Mixed, Female and Open Under 17.

The boat has been used for team racing in both the ISAF Team Racing World Championship and the ISAF World Sailing Games however the class established its own team racing competition in 2015. Only the International 14 and Optimist (dinghy) class association hold a team racing based World Championships in addition to the two discipline led events.

The class has been used extensively at the Youth Sailing World Championships which run by World Sailing this is different to the Class Worlds by way that equipment is supplied and entries are limited to one entry per nations but often from more nations.

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• [http://www.420sailing.org/ Official international class website]
• [http://www.420sailing.org.uk/ Official UK class website]
• [http://www.aut420.com/ Official Austrian class website] {{Webarchive|url=https://web.archive.org/web/20110128194337/http://www.aut420.com/ |date=2011-01-28 }}
• {{Official website|http://www.club420.org/|Club 420 Association, Inc. official website}}

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{{Sailing dinghies and skiffs}}

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Category:Dinghies

Category:Sailboat types built by Grampian Marine