We have produced some simple measurement guides for owners*, please see below (PDF format). 


Gaff rig P, E and mainsail widths


What is headsail LLmax?

Headsail data on cutter rigged boats


Rig (P, E, J, FL, STL)

Running Rigging explained

If you have any queries please contact your Rule Authority, thank you.

*If you need an Endorsed certificate for your chosen events, then data will need to be officially measured, again please contact your Rule Authority about this.


If you cannot find the answer to your question, please email me at webmaster@ircrating.org thank you.
Jenny Howells, webmaster.
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