NOTE: The information on this page is complementary to the IRC Rule text and does not remove any obligation to read and comply with the IRC Rules.
Measurement drawings *including guidance on measuring x and h (and when it is required) updated 10/4/18
IRC Measurement manual 2018 (PDF)
World Sailing Equipment Rules of Sailing (ERS) 2017-2020
Help with mathematical formulae used in the IRC Rule
Rules for Endorsement of IRC certificates (PDF) updated 2014
IRC worksheet (PDF) Print this and use it to collect the data for your application. Please do NOT use this as an application or input sheet!
Guidelines for photographing your boat (PDF)
ORC equivalent data abbreviations
HULL and APPENDAGES
IRC weight & measurement input sheet (for official measurers) from 1/1/16 (Excel)
IRC Measurement Condition What needs to be aboard (or not) for measuring Boat Weight, Overhangs and Draft
IRC lead in keel fins. Full paper
Bulb Weight clarification of what is included
RIG and SAILS
IRC aft rigging drawings. Full paper
Simple measurement guides - rig and sails *updated 2018
Spinnakers and pole/bowsprit rating explained (Nov 2017) French language version
Single Roller Furling Headsail – Maximum size for a Heavy Weather Jib
Cutter rigs - 'beat to windward' definition
Headsail Upper (7/8) Width - HUW - default sizes for pre-2013 sails January 2013