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THE 2.4mR - SPECIFICATIONS

2.4mR Specifications

The shape of the 2.4mR resembles that of larger boats that adhere to the metre rule, such as the 12-metre boat that was sailed at the America’s Cup and at the Olympics. First developed in Sweden at the beginning of the 1980s, there were initially several designs for the 2.4mR, one of which was by Peter Norlin. Norlin then created the MkII and MkIII. The Norlin MkIII proved to be versatile in all weather conditions, and it rapidly became the most commercially available 2.4mR.

All the controls are displayed in front of the helmsperson; each trim control within easy reach. The sailor can steer using either hands or feet. The sailor’s weight is close to the centre of gravity, therefore size and fitness level of the sailor have a negligible impact on speed. In other words, the 2.4mR can be considered the most inclusive sailing boat available today, making all competitors virtually equal on the water regardless of their age, physical strength or gender. The great demands on the individual are entirely down to pure sailing skills, with an emphasis on strategy, sail trim and speed.

Thanks to its singular qualities, the 2.4mR quickly became one of the fastest-growing keelboat classes of all time. It attained international status in 1992, when annual World Championships began attracting large fleets of 2.4mR each year. When sailing became a full-medal sport at the Paralympics in 2000, the Norlin MkIII was selected as the single-handed class. The 2015 Open World Championship in Rauma, Finland attracted 102 competitors from 15 nations.

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Source: International 2.4mR Class Association

2.4mR Specifications

Crew 1

Draft 1 m

Weight 254 kg

LOA 4.16 m

Beam 0.805 m

Mast length 5.0 m

Upwind sail area 7.5 m2

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Based on the Norlin Mark III

CLASS RULES

INTERNATIONAL 2.4mR CLASS (2.4mR)

2.4 NORLIN ONE DESIGN CLASS (2.4 NOD)

The International 2.4mR Class is a development class for boats that comply with the 2.4mR Open Class Rules. 2.4mR boats are administered by Member National Authorities under delegation by World Sailing.

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The 2.4mR class rule provides a development option for sailors who want to innovate within the meter rule, which has produced beautiful boats for over a century. Current production 2.4mR boats include the Super 3, Stradivari, and Södergren. Under this rule, home-built 2.4mR boats can also be built.

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2.4mR Class Rules (Updated: 16 June 2025) (NEW)

Class Rule Changes (26 February 2025)

Class Rule Changes (Effective date: 12 December 2024)

 

Class Rule Interpretation - Rigging Point 2 (Effective date: 21 May 2024)

The Classic 2.4mR Rule

The 2.4mR Rating Rule


Forms:

2.4mR Measurement Form (.pdf)

Waterline Declaration

Buoyancy Certificate Form (NEW)

Builder Declaration Form

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Source: International 2.4mR Class Association

The 2.4 NOD is a restricted class with boats complying with the 2.4 NOD Closed Class Rules. 2.4 NOD boats are a class of 2.4mR boats, based on the Norlin Mk III design and administered by the 2.4mR ICA.

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The 2.4 NOD class rule provides a one-design option for sailors racing in boats of equal performance, where results are determined by the skill of the sailor. The 2.4 NOD has been selected by World Sailing as the single-person technical equipment for Para Sailing.

 

2.4 NOD boats are manufacturer-controlled with Super 3 (Brian Harding), an ICA-accredited builder. 2.4 NOD builders understand that they are constructing a standard product that will not become outdated and is subject to quality control.

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2.4 NOD Class Rules 2025 (v.2) (NEW)

2.4 NOD Construction Manual 2023

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Forms:

2.4 NOD Measurement Report Form for OLD Boats

2.4 NOD Measurement Report Form for NEW Boats

2.4 NOD Measurement Report Mast & Boom

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Source: International 2.4mR Class Association

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