ORC Multihull Certificate
  ORC Multihull certificates come in four A4 pages. The first page gives a general overview of the boat with its rated boat speeds, in addition to the measurements of the main hull, the propeller, the rigging and the sail.

The second page is presenting the scoring options.
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The third page is showing a detailed list of measurements of the hull and appendages, propeller, rig, flotation, and the measurement inventory, while the fourth page is reserved for measurements within the sails inventory. 

Place the cursor over different parts of the certificate page for a brief explanation. More details are given in the measurement and scoring sections, while complete definitions can be found in the appropriate rules documents.
   
 


 
 


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RATING OFFICE

This is a space for the Rating Office logo. ORC Rating Offices are established worldwide in each country that has active offshore racing. Rating offices have several functions, including supervising the measurement and rating of yachts, supporting ORC racing by administering to their national fleets, and issuing ORC certificates.

Currently, ORC Multihull certificates are issued by the ORC Central Rating Office while this role will be given to the National Rating offices in the future.

TIME ALLOWANCES
An ORC multihull certificate provides a range of ratings, expressed as Time Allowances in s/NM for different wind conditions in the range of 6 – 20 knots of true wind speed for an optimum beat, and for 52, 60, 75, 90, 110, 120, 135, 150 degrees of true wind angle for an optimum run.
These time allowances are used in Performance Curve Scoring as a unique feature that is fundamentally different and much more precise than any other handicap system. It can rate different boats for different race conditions and course configurations by giving the boat’s theoretical predicted speeds for any wind condition and direction.

Time allowances for 7 wind speeds are also given for two pre-defined courses: Windward/Leeward is a conventional course where the race course consists of 50% upwind and 50% downwind legs, while the All Purpose course type includes equal distribution of all wind directions.

SINGLE NUMBER SCORING OPTIONS
The Time on Distance and Time on Time single number ratings are shown here for Windward/Leeward and All-purpose course models determined as a mix of all wind angles with wind speeds distributed across a range of values from 6 to 20 knots, as described in ORCmh Rule 403.2.
CERTIFICATE

ORC Reference number is a unique number identifying that certificate and may be retrieved in the ORC database available at the ORC Sailor Services.

There is an issue date as well as a VPP version used together with the latest date for the validity of the certificate.  

A boat shall have only one valid certificate at any one time. The valid certificate is the last one issued.

ORC Certificates are valid for one year. This is because the VPP software calculations are updated yearly based on the ITC’s latest research of aero and hydrodynamics, as well as improvements made from analysis of race results and boat performance during the racing season, and submissions made from ORC Nominating Bodies.