IRC Documents & Information
- IRC measurement manual (updated Feb 2024)
- Acceptable Sources of Data
- Endorsement Standards and Process (updated Feb 2024)
- 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)
Download or view key IRC documents and IRC rating information.
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One 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. Rig and sail data are not standard and shall be supplied.
This list may not include most recently rated designs. 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.
See also the Sections below.
Rig & Sails
- IRC aft rigging drawings
- Number of Headsails Q+A v1 2024
- Heavy Weather and Storm Jib sizes (updated Jan 2024)
- Flying Headsail Summary and Q+A v2 2024
- Flying Headsail Summary and Q+A v1 2020-2023 (South countries until 31 May 2024)
- Sail Measurement Stickers Q+A v3 - 6 Feb 24
- IRC sail check and area calculation form
- IRC sail measurement sticker template (for approved measurer use only)
- Sail input form (for approved sail measurers) 2024 onwards
- Single furling headsail allowance - an explanation of the overlap limit
- Headfoil width - rig factor
- Cutter rigs - 'beat to windward' definition
- Sail materials