One Metre

{{Use dmy dates|date=April 2023}}

{{Infobox sailboat specifications

|fetchwikidata = ALL

|onlysourced = true

|name = International One Metre (IOM)

|insignia =

|insignia size =

|insignia alt =

|insignia caption =

|line drawing =

|line size =

|line alt =

|line caption =

|image boat = REE 8594.jpg

|image size =

|image alt =

|image caption = Kantun 2 design

|designer = Various

|architect =

|location =

|year = 1988 Onwards

|no built = +10000

|design =

|class =

|brand =

|builder = Various

|role =

|boats =

|crew =

|trapeze =

|draft = {{convert|430|mm|inch|abbr=on}}

|air draft =

|displacement = Min {{convert|4.00|kg|lb|abbr=on}}

|hulls = Monohull

|hull type =

|construction =

|loa = Max. {{convert|1000|mm|inch|abbr=on}}

|loh = Max. {{convert|1000|mm|inch|abbr=on}}

|lwl = Max. {{convert|1000|mm|inch|abbr=on}}

|beam =

|hull weight =

|appendages =

|keel type = Bulb keel

|ballast = Max {{convert|2.50|kg|lb|abbr=on}}

|rudder type = Single

|rigs =

|rig type = Sloop

|I =

|J =

|P = Rig A - {{convert|1600|mm|inch|abbr=on}}
Rig B - {{convert|1180|mm|inch|abbr=on}}
Rig C - {{convert|880|mm|inch|abbr=on}}

|E = {{convert|360|mm|inch|abbr=on}}

|mast length =

|rig other = Alloy Spars

|sails =

|sailplan =

|sailarea main =

|sailarea headsail =

|lp =

|sailarea spin =

|sailarea gen =

|sails other =

|sailarea upwind =

|sailarea downwind =

|sailarea total =

|status = International

}}

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.