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IRC: Spinnakers & Poles explained

Easter2016 PWyeth 1The RORC Rating Office is sometimes asked whether symmetric and asymmetric spinnakers are rated differently in IRC, and whether there is a rating increase if you use both types. The question is often prompted by the application form asking questions about the spinnakers of each type carried aboard, rather than just the spinnaker area (SPA) and total number of spinnakers. There are two aspects of downwind sail rating: the sail itself and the type of pole (if any) on which it is set - as explained in the downloadable PDF below.



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RORC weighing loadcells - see them in action!

RORC measurers use high quality loadcell equipment for weighing IRC boats, supplied by industry leaders Dynamic Load Monitoring (DLM). This equipment is owned by Seahorse Rating Ltd and the loadcell fee we charge goes towards the costs of regular calibration and maintenance, as well as transport of the loadcells around the country.

Recently DLM made a short video while RORC Measurer Patrick Pym was weighing a yacht in Hamble:

Dynamic Load Monitoring video

Do I need to have my boat weighed & measured?

no weighingDo I need to have my boat weighed & measured?

No, IRC is a self-measurement system and we also hold standard hull data for hundreds of production designs. There is thus no general requirement for an owner to have the boat officially measured or weighed unless either he chooses to do so, or his Rule Authority (ie. his local IRC body) and/or an Organising Authority for a race requires official measurement, generally resulting in an endorsed IRC certificate.

To arrange to have your boat weighed and measured please contact your local Rule Authority with details of the boat, they will let you know what is required and put you in touch with the local measurer. For boats in the UK this is the RORC Rating Office  tel 01590 677030

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