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ORC 2010 Rules are
downloadable for free from this web site to be saved and
printed as needed. Compliance with IMS Rule 304 (a copy of
the Rules must be on board while racing) can thus be
fulfilled by having the pdf file on a computer, palm top or
any other device taken on board while racing. Some
clarifications or updates may be required in the course of
the coming months. And whenever any corrections may become
necessary, these will be published on this page. |
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International
Measurement System IMS |
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IMS
is measurement platform that
defines measurement procedures
and methods for measuring hull,
appendages, propeller,
stability, rig, sails, heavy
items adn accomodation. The
complete data set of IMS is
intended to be used primarily
for ORC International and ORC
Club, but can also be used by
other handicapping systems that
wish to adjust their performance
analysis or secret or public
formulae. IMS is using ISAF
Equipment Rules of Sailing (ERS)
definitions and prescriptions
where possible and may be easy
understandable for any measurer
having expirience in measuring
different type and classes of
yachts. The 2010 version include
new simplified Cruiser/Racer
regulations which replace former
IMS Accommodation Regulations.
Click
here or on cover page to
download PDF file.
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ORC Rating Rules |
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ORC
Rating systems (ORC
International and
ORC Club) use
the International Measurement System (IMS) as a measurement
platform and the ORC Velocity Prediction Program (VPP) to
rate boats of different characteristics in size, hull and
appendages shape and configuration, stability, rig and sails
measurement, propeller installation and many other details
affecting their theoretical speed. ORC Rating Rules includes
limits and defaults for hull, rig, sails, crew, rules
applying while racing, certificate layouts and description
as well as complete explanation of different scoring options.
Version 1.01 from 31.03.2010. include
corrected misprints in rules 109.1, 113.4(b), 114.4(b).
Click
here or on cover page to download PDF file.
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ORC VPP
Documentation 2009 -
(2010 version will be
available soon) |
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The ORC VPP
is part of three key elements to
the current ORC handicap system:
the International Measurement
System (IMS) used to measure the
boat, and it sails, spars, and
appendages; the performance
prediction procedure which
determines the parametric inputs
used by the VPP to predict
sailing speed at different wind
speeds and wind angles, and with
different sails set; a race
management system where the
results of the VPP are applied
to offer race handicapping,
whether generalized or specific
to the conditions of the race.
The VPP Documentation describes
the methodology of the equations
used to calculate the forces
produced by the hull,
appendages, and sails, and how
these are combined in the VPP.
Click
here or on cover page to
download PDF file. |
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GP Class Rules |
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GP Class Rules are available at the
GP page.
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Offshore Special
Regulations |
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Offshore Special Regulations are available
at the
ISAF website.
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ORC Speed Guide
Explanation |
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The
ORC Speed Guide puts the power and accuracy of the ORC VPP to work
for you, the boat owner. Use of the Speed Guide can
help your team improve their performance on the water by
giving you target boat speeds to achieve for any wind
strength and any wind angle and with any sail
combination. This package collates and displays in both
tabular and graphical form the theoretically predicted
boat speed, in knots, of any boat measured for ORC
International or ORC Club. The data is given for a wide
variety of true wind speeds (6, 8, 10, 12, 14, 16, & 20
knots) and true wind angles, including optimal upwind and
downwind VMG angles. The data is also provided for a variety
of sail combinations: jib, genoa, asymmetric spinnaker,
symmetric spinnaker, and Code 0.
Click here or on cover page to download PDF file ... |
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ORC Stability and
Hydrostatics Datasheet Explanation |
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The ORC
Stability and Hydrostatics
Datasheet
presents valuable stability data
relevant for class and event
organizers to determine the
stability characteristics of
offshore boats. Using
measurement data taken from the ORC International and ORC Club
certificates, the datasheet
displays important stability
information such as the Righting
Arm Curve and the Stability
Index calculation, and how they
relate to the requirements of
the Offshore Special
Regulations. Hydrostatic data is
also given for the displacement,
length of waterline and
overhangs, wetted surface area,
and longitudinal centers of
buoyancy and flotation, with all
data calculated for both
measurement and sailing trim. An
additional Righting Arm Curve is
also given for water ballast and
canting keel configurations.
Click here or on cover page to
download PDF file ... |
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