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IRC YEARBOOK 2009
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Q: If my boat does not qualify for a race under STIX/AVS, can I still A: No. Although the two methods are aimed at answering the same
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qualify under SSSN? And vice versa? general question, they use different data and functions to arrive at the
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A: Qualification for RORC-organised races will depend on the ISAF answer. So while the two values will be broadly compatible, they are
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Offshore Special Regulations (SR) Category of the particular race and not in any way linked.
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also the age of the boat as follows:
Q: Why do we need STIX/AVS when we already have SSSN?
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A: SSSN was developed in the 1980s before computerised stability
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SR Cat 1 and 2 races: Boats with series date of 1995 and later will
analysis was readily available for all boats. STIX/AVS makes much
be categorised under STIX only.
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greater use of this analysis and is technically more rigorous than
Boats with series date before 1995 may use
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SSSN. Now that the International Standard has been formalised,
either STIX or SSSN.
owners and race organisers alike ignore it at their peril.
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SR Cat 3 races: Boats with series date of 2000 and later will
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be categorised under STIX only.
Q: Where can I find out more about the International Standard and
Boats with series date before 2000 may use
how it is applied?
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either STIX or SSSN.
A: A more detailed paper is available on the RORC Rating Office
SR Cat 4 races: Boats may use either STIX or SSSN.
website (www.rorcrating.com). Alternatively, please contact the
International Standards Organisation (www.iso.ch) for a copy of the
Organising Authorities for other races will set their own criteria.
Standard, ISO 12217-2.
Q: Are STIX and SSSN values directly related?
For more information contact the Rating Office.
To find out more about STIX, AVS, and Design Category, or to apply for:
• Inclusion of Notified Body STIX and AVS Data on a Boat’s IRC Certificate.
• Calculation of IRC STIX and inclusion on a boat’s IRC certificate.
• Inclusion of Designer calculated STIX, AVS, and Design Category on a Boat’s IRC Certificate.
Please go to our website
www.rorcrating.com
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IRC 09 Screening P54-56_bs.indd 56 1/12/08 09:31:22
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