Origins and Evolution of the Rule
The 1907 First Rule used a formula that balanced waterline length, beam, girth differences, sail area, and freeboard. It produced relatively short hulls of around 5.5 to 6 meters, with long bowsprits extending overall length to about 9.5 meters and a narrow beam near 1.75 meters. These early gaff-rigged boats carried 50 to 60 square meters of sail and were very wet to sail, with limited seaworthiness.
The class was selected for the 1908 London Olympics, raced off Ryde, and for the 1912 Stockholm Games at Nynäshamn. By 1914, 208 Sixes had been built under the Rule across Norway, Sweden, Denmark, Germany, England, Italy, and France.
Designer John Anker helped shape the 1919 Second Rule, which was intended to encourage more seaworthy yachts. It replaced the maximum-beam penalty with a minimum beam, increased waterline length to 7 meters, and saw displacement rise from 3 to 4 tons. Marconi rigs of around 40 square meters became standard. The class also spread to new countries, including the USA, Argentina, Uruguay, and India.
The genoa appeared in 1926 because sail area was measured by the foretriangle rather than by the actual size of the headsail. In 1933, the Third Rule introduced deeper keels and lower ballast for greater stability, along with more buoyant forward sections.
Design and Construction
Six Metres are broadly similar in overall design, measuring around 11 meters, or 36 feet, in length. Most carry a Bermudan rig, mainsail, and overlapping genoa. Like racing cars, they’re stripped to the essentials to save weight.
The class served as an Olympic class from 1908 to 1952 and as a development testbed for the America’s Cup 12 Metres. The Twelve Metre’s adoption in 1958 renewed interest in the Rule.
During the 1970s Moderns era, the Six became one of its time’s most innovative development classes. Designers separated the rudder from the keel, making it more effective, and changed both bow and stern shapes. The keel saw the biggest improvement.
Rig, Crew, and Handling
The Six is a crewed racing machine rather than a cruiser. It’s raced with five people, although it can be managed with fewer, and is ideal in calm waters with winds up to force 5. Crews fly a large spinnaker downwind.
On Modern-era boats, the separated rudder provides sharper control than the earlier attached profile. Combined with level racing under the measurement rule, this makes the Six a thoroughbred racing yacht rather than a cruising boat.
Accommodation
There’s no pretense of cruising comfort. The boats offer little shelter from the weather and no creature comforts. Accommodation is minimal by definition in what is essentially a racing shell.
Known Issues
The defining operational caveat is that Sixes are notoriously wet boats to sail, requiring crews to prepare for all conditions. Early First Rule boats were explicitly limited in seaworthiness. Meaningful improvements in stability and forward buoyancy didn’t arrive until the 1933 rule changes.
The Verdict
The International 6-Meter is a living museum of naval architecture and a pure racing development class. Its appeal lies in the variety created by individual designers working within a fixed rule, as well as in its continuous lineage from Olympic competition to the modern revival. Domestic comfort plays no part in the equation.
Pros
- Design freedom within the Rule produces unique boats that race level
- Deep historical lineage from the 1908 Olympics to the Modern revival
- More effective separated rudder and improved keel in later eras
- Ideal in winds up to force 5, with genoa and spinnaker power
Cons
- Notoriously wet sailing, with minimal shelter for the crew
- No creature comforts or cruising accommodation
- Early Rule versions were limited in seaworthiness
