Hull Factor: the thermometer of IRC (PDF)
Paper by IRC Technical Committee 13 Feb 2008 (PDF)

“Are we winning?” (PDF)
You’re ahead, but is it enough? Mike Urwin explains how to calculate your position on the race course.

Secrets of Success (PDF)
Rating Office Technical Director Mike Urwin reveals some of the inner workings of the IRC Rule. (IRC Yearbook 2006)

What is Boat Factor? (PDF)
(IRC Yearbook 2007)

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