Thursday, October 1, 2015 at 1:08PM 
If you are having your boat weighed for IRC it needs to be in IRC Measurement Condition. This is described in IRC Rule 17.1 and 17.2 and also applies to measuring the Overhangs and the Draft.
One way we often describe it is that if you turn the boat upside down and shake it, nothing would fall out (although we don't expect you to actually try this!).
Thursday, October 1, 2015 at 1:00PM James Dadd, Director of the RORC Rating Office, writes an article every two months for Seahorse Magazine. Seahorse has kindly agreed to the article text being published here, a couple of months after publication in their magazine
Tuesday, September 1, 2015 at 1:04PM After 22 years at the RORC Rating Office, Mike Urwin, its Technical Director, is stepping aside to relinquish the day to day running of the Rating Office to James Dadd, 44, with effect from 1st September. The RORC Rating Office, along with the UNCL Centre de Calcul in Paris, maintains and administers the IRC Rating Rule for boats racing in over 30 countries worldwide.
Friday, August 15, 2014 at 8:41AM The latest 2014 IRC Ratings for SEA based boats are online under the "Latest 2014 Ratings" Menu.