One Metre

International One Metre (IOM)
Kantun 2 design
Development
DesignerVarious
Year1988 Onwards
No. built+10000
Builder(s)Various
NameInternational One Metre (IOM)
Boat
DisplacementMin 4.00 kg (8.82 lb)
Draft430 mm (17 in)
Hull
GeneralMonohull
LOAMax. 1,000 mm (39 in)
LOHMax. 1,000 mm (39 in)
LWLMax. 1,000 mm (39 in)
Hull appendages
Keel/board typeBulb keel
BallastMax 2.50 kg (5.5 lb)
Rudder(s)Single
Rig
Rig typeSloop
P mainsail luffRig A - 1,600 mm (63 in)
Rig B - 1,180 mm (46 in)
Rig C - 880 mm (35 in)
E mainsail foot360 mm (14 in)
Rig otherAlloy Spars

The International One Metre (IOM) is a class of Radio Sailing Boat used for racing under the World Sailing - Racing Rules of Sailing. It is a measurement-controlled box rule originally created by the ISAF-RSD (now the International Radio Sailing Association) in 1988 in an attempt to harmonise the various one metre rules created around the world. The IOM Class Rules specify a standardised sail plan and control of the other major performance dimensions (displacement, length, and draught) while allowing some freedom in hull design. The IOM is now the largest and arguably most competitive of all radio sailing classes.