Photograph guidelines for rating
- Last Updated on Wednesday, 06 March 2013 15:05
If your boat is not a standard production boat with which we are familiar, or your boat has had modifications to the design, we usually ask for photos so that we can assess the boat in the fairest way possible. In order to help us do this, we have put together some guidelines to show the type of pictures that are useful to us:
Headsail HUW (7/8 width) defaults
- Last Updated on Tuesday, 26 February 2013 11:22
Headsail HUW default size
Those of you revalidating your 2012 certificate for 2013 will have noted that it is acceptable to use a default HUW (Headsail Upper 7/8 Width) for existing headsails. The default size depends on the overlap of the headsail, and is related to the HTW (Headsail 3/4 Width), and is calculated as follows:
For overlapping headsails with LP/J greater than 1.10, the default is HTW x 0.50.
For non‐overlapping headsails with LP/J 1.10 or smaller, the default is HTW x 0.56.
These default sizes are based on actual measured data for a significant number of sails, and any variation from the default will have a very small effect on rating.
For all newly measured sails we now need the HUW to be declared.
Simplified measurement guides
- Last Updated on Friday, 10 May 2013 11:05
We have produced some simple measurement guides for owners*, please see below (PDF format).
Gaff rig P, E and mainsail widths
Headsail data on cutter rigged boats
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.
IRC Standard hull data
- Last Updated on Sunday, 09 September 2012 04:46
Note that this list is usually updated annually, if in doubt please contact your Rule Authority to check the status of a particular design.
