IRC Documents & Information
- IRC measurement manual (updated November 2022)
- Acceptable Sources of Data
- Standards & Process for Endorsement of IRC certificates
- IRC worksheet - Print this and use it to collect the data for your application. Please do NOT use this as an application or input sheet
- Help with Mathematical Formulae Used in the IRC Rule
- Photographing your boat for IRC
- World Sailing Equipment Rules of Sailing (ERS) - see link at end of Rules page
Download or view key IRC documents and IRC rating information.
Icon Key
Downloadable PDF File
Downloadable Excel File
Downloadable Word File
External Website Link
Internal Website LinkOne Designs & Standard Hull Data
IRC One-Designs may use the OD simplified application form. Please request this from your Rule Authority.
Production designs with standard hull data need not supply LH, overhangs, beam, or boat weight. If in doubt please contact your Rule Authority to check the status of a particular design.
Measurement Guides
We have produced these measurement guides for owners and club measurers. If you require an Endorsed certificate for your chosen events the data will need to be officially measured, in which case you will need to contact your Rule Authority. If you have any queries, please also contact your local Rule Authority.
For standard production designs it not usually necessary to measure LH, Beam and Draft, unless required by your Rule Authority.
Rig & Sails
- Whisker pole Q&A
- IRC 2021 Reval poles & SPL advice
- Flying Headsail Summary and Q+A
- Sail input form (for approved sail measurers) 2021 onwards
- IRC aft rigging drawings
- Single furling headsail allowance - an explanation of the overlap limit
- Single Roller Furling Headsail – Maximum size for a Heavy Weather Jib
- Cutter rigs - 'beat to windward' definition
- Sail materials
- Headfoil width - rig factor
