IRC YEARBOOK 2009
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HOW DOES IT ALL WORK?
Q
S
Many of you are familiar with the IRC system, but for newcomers and those of you who still aren’t sure and don’t
like to ask, here is a brief explanation of how it all works, and answers to some frequently asked questions
See also our website (www.rorcrating.com) which contains more information and news
OVERSEAS OWNERS: The notes on this page mainly apply specifi- IRC authority or club request it. Your local authority will sort out any que-
cally to boats in the UK, so where it states ‘we’ or ‘us’ please read as your ries with you and then forward your application to us for processing.
local IRC authority. Although much of the information applies to over- Once processed we will send your boat’s certificate file back to your
seas boats as well, note that individual IRC authorities may have differ- local authority for printing. During Jan-Aug we have hundreds of ratings
ing administration methods. Your country may not have a local IRC to process, so it can take 28 days – please get your application in early
authority yet – please see the list on page 64 – in which case you may and allow for local administration time. Please note the ‘expedited
send your application direct to the Rating Office. processing fee’ for late applications! If your boat is a strict one-design
Overseas new application: To apply for a rating, complete the Excel recognised by IRC, you can use the One-Design application form on
application form (available on our website) and return it to your local IRC page 53. Please read the rules before you submit the form, and the ap-
authority by e-mail with the fee. IRC is a self-measurement system, plication notes and definitions. If you are not sure, please ask! All IRC
which means you do not have to get the boat measured unless your local rating requests must be sent via your local IRC authority.
Applying for a rating – When you get your certificate
UK and countries without a local IRC authority (see page 64). Please check your certificate, not only the measurements but all the
To apply for a rating, complete the Excel application form (available on our details. If you find any errors, let us know as soon as possible so we can
website) and return it to us by e-mail with the fee. IRC is a self-measurement correct them or explain why something is different from what you were
system, which means you do not have to get the boat measured unless you expecting (eg. standard data).
need an Endorsed certificate (see opposite). If we have any queries we will Your certificate will be accompanied by a letter. Please read this
contact you, usually by e-mail if you have given an address. through as it will answer many questions you may have.
Once the certificate has been processed, it will be mailed to you first The TCC
class (or airmail) the same day; during Jan-Aug we have hundreds of So what do the clubs do with the TCC (rating) now that you have it? IRC is
ratings to process, so it can take 28 days – please get your application a Time on Time system and the TCC is a simple multiplier which is applied
in early. Please note the new ‘expedited processing fee’ for late appli- to the actual time taken to complete the race. This then gives a corrected
cations! If your boat is a strict one-design recognised by IRC, you can time and the boat with the shortest corrected time wins. So: CT = ETxTCC
use the One-Design application form on page 53. Please read the rules where CT=corrected time and ET=elapsed time. The higher the TCC, the
before you send us the form, and the application notes and definitions. faster the boat is. It is simple to work out how much time boats give each
If you are not sure, please ask! other – page 29 explains how to do this.
ACCEPTABLE SOURCES OF DATA
IRC is a self-measurement system. There is no requirement either to have your boat officially measured or weighed unless you want to, your IRC
Rule Authority requires it, or you need an Endorsed certificate.
Generally, acceptable sources of data are as follows:
[E] denotes acceptable for Endorsed certificate
Linear measurements (hull, rig) : Class standard weight or sistership weighed data
[E] Official measurement by an authorised measurer Weight derived from ORCi or other rating certificate. [E] at the
[E] ORCi measured data discretion of the Rule Authority
[E] One-design data for approved IRC one-design classes Weighing on weighbridge is usually accepted unless we believe it to
Owner or representative measurement be in error
Designer or builder data * Designed weight, or derived from designed sailing displacement *
Class standard hull data
The following are NOT acceptable :
Linear measurements (sails) :
Registered Tonnage
[E] Official measurement by an authorised measurer
Weighing on built-in loadcell of crane
[E] Measurements supplied by an authorised sail measurer
Weighing on travel hoist
Owner or representative measurement
Weight: * Data from a sales brochure is usually acceptable, but we reserve
[E] Weighing on an approved single point loadcell, verified by an the right to use different data where we believe it to be more accurate.
authorised measurer Please contact us if you wish to arrange measurement or weighing
[E] Weighing on approved pressure pads, verified by an authorised by a RORC measurer.
measurer Charges will be as detailed in the Fees (see page 53) and we will
[E] One-design data for approved IRC one-design classes require credit card details or a deposit from you before measurement
[E] Light class standard weight for established production designs is undertaken.
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IRC 09 FAQs P57-58_bs.indd 57 1/12/08 09:32:25
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