Screening
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
qualify under SSSN? And vice versa? general question, they use different data and functions to arrive at the
A: Qualification for RORC-organised races will depend on the ISAF answer. So while the two values will be broadly compatible, they are
Offshore Special Regulations (SR) Category of the particular race and not in any way linked.
also the age of the boat as follows:
Q: Why do we need STIX/AVS when we already have SSSN?
A: SSSN was developed in the 1980s before computerised stability
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.
greater use of this analysis and is technically more rigorous than
Boats with series date before 1995 may use
SSSN. Now that the International Standard has been formalised, S
either STiX or SSSn.
owners and race organisers alike ignore it at their peril.
cheme
SR Cat 3 races: Boats with series date of 2000 and later will
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?
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 the IRC website www.ircrating.org







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59
IRC2010 Screening STIX.indd 591257436877845_page1_Wave2PDFRoute.pdf 1 11/5/09 4:01:20 PM27/11/09 10:28:17
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