Please see the dedicated IRC site ircrating.org for:

An Introduction to IRC (from IRC website)

New to IRC?  we're here to help

MyIRC - apply for new applications, revalidation, amendments and trials online (GBR based boats only unless by prior agreement with the Rating Office)

MyIRC FAQ

How to Get an IRC Rating

IRC Application Forms 2012

Fees 2012 (PDF)

IRC 2012 Yearbook online

Notes relating to your 2012 IRC certificate

Now that you hold a current certificate.... 

In-House Certification (IHC) and IRC Endorsement - Sail measurement

ISAF list of In-House Certification (IHC) registered sailmakers.

Does your sailmaker organise trials for your boat? They can also use MyIRC

Sail Numbers

STIX & AVS information

Seahorse Magazine articles by James Dadd

Racing:

Online IRC rating list

GBR IRC Regional Championships

Real time calculator for on-the-water

GBR IRC Committee:

Committee Members & Area Contacts

Committee Minutes

If you wish to be considered for future GBR IRC Committee membership, please contact the Rating Office.

For Race Organisers:

IRC Incentive Schemes

Pursuit race calculator