CBH Rating System
Australian Class Based Handicap (CBH) Rating System
For Trailable Yachts and Sports Boats
Australian Sailing undertook a review of the role of the National Trailable Yacht & Sports Boat Committee in 2020
As part of this process, a survey of stakeholders was conducted which attracted over 470 responses. The feedback from this survey resulted in some small changes to the handicapping model, as well as the procedures for managing ratings applications.
The Class Based Handicap (CBH) formula has now been updated to align it with World Sailing’s Equipment Rules definitions and remedy some other previously identified issues. This change will ensure the rating is more inclusive, allowing a wider range of Trailable Yacht and Sports Boat Classes access to a CBH rating.
As a result of the changes to the model and definitions the Trailable Yacht & Sports Boat Rule has been amended to reflect these changes and has now become the CBH Rating System.
In addition, the National Committee has been disbanded and the CBH ratings function will be administered internally by Australian Sailing staff. Australian Sailing will also coordinate the hosting of the National Championships, in line with the way other Australian Sailing events are managed.
The Rating System is intended to:
• Provide a National System for even and fair racing on handicap in a mixed fleet of Trailable Yachts and / or Sports Boats
• Ensure transparency across the rating system
• Allow Trailable Yacht and Sports Boat owners to gain a new CBH at any time of the year
• Support Australian Sailing in its work to promote Trailable Yacht and Sports Boat racing activities within the states and territories and at national level.
Key Points:
• The Rating System only requires boat measurements, not performance data.
• The CBH rating list will be published online and updated regularly and new boats are added.
• The CBH formula will be reviewed annually and any amendments will be posted from time to time.
NEW APPLICATIONS, AMENDMENTS and TRIALS:
To declare your boat or your class measurements you will need to upload the Measurement Input Sheet that you can be downloaded here. This sheet once completed should be uploaded as is.
Measurements input sheet Rev J-07
- If you are a Class Representative and you want to declare your Class measurements to get a CBH rating, you can do it online. A fee of $125 applies for Class Application.
- The measurement manual for CBH is available here.
- The light shiprequirements for weighing are explained here.
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If you are the owner of One of A Kind boat that can't fit in any Class (either because it has been modified or because it's a one off design) you can apply online for a new CBH rating or to amend an exsisting certificate here a fee of $125 applies for each application.
- Certificate trials are available from the Rating Office apply here the fee is $65.00 per trial, a trial certificate will not be valid for racing
CBH RATING LIST:
The CBH rating list will be updated on a day to day basis with new measurements and new Classes as they come to hand. The CBH formula will be reviewed once a year on the 1st of July. The ratings are presented as a PDF any boat with a rating of 1 has insufficient date at the time of publishing this report.
| Download the listing as a pdf - | CBH 26-05-21 |
| Alternative listing of CBH showing primary calculations used - | |
| Race Organisers can download the JSON Data |
The rating formula is reviewed once a year and a new list is issued each year on the 1st of August.
The Australian Sailing Rating office is still looking for some Class measurements. If you can provide measurements for a Class that is not listed in the new rating list, please contact the Rating Office, your help will be much appreciated:
(02) 9170 6917
Software Update: (2nd of Sept 2022)
The calculation of effective length has been updated resulting in rating changes. (120822)
Non-Spinnaker CBH Calculation altered generally increasing the NSCBH value 2% to 3% (020922)
MEASURERS:
The CBH rating needs to be measured by an Australian Sailing Accredited Measurer. You will find the list of Measurers in Australia here.
PROPOSED REBUILD
In 2020, Australian Sailing reviewed the National Trailable Yacht & Sports Boat Committee, gathering feedback from over 470 stakeholders. This led to updates in the handicapping model and ratings application process.
The Class Based Handicap (CBH) formula was aligned with World Sailing's Equipment Rules, making it more inclusive and opening access to a wider range of Trailable Yacht and Sports Boat classes. The Trailable Yacht & Sports Boat Rule was subsequently renamed the CBH Rating System.
The National Committee has since been disbanded, with ratings and National Championships now managed internally by Australian Sailing staff, consistent with other Australian Sailing events.
The Rating System is intended to:
• Provide a National System for even and fair racing on handicap in a mixed fleet of Trailable Yachts and / or Sports Boats
• Ensure transparency across the rating system
• Allow Trailable Yacht and Sports Boat owners to gain a new CBH at any time of the year
• Support Australian Sailing in its work to promote Trailable Yacht and Sports Boat racing activities within the states and territories and at national level.
Key Points:
• The Rating System only requires boat measurements, not performance data.
• The CBH rating list will be published online and updated regularly and new boats are added.
• The CBH formula will be reviewed annually and any amendments will be posted from time to time.
CBH Measurement Guide
Application, Amendment & Trial
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CBH Resources
| CBH Rating List | The CBH rating list will be updated on a day to day basis with new measurements and new Classes as they come to hand. | View the list |
| Alternate CBH Rating List |
Alternative listing of CBH showing primary calculations used. The CBH formula will be reviewed once a year on the 1st of July. |
View the list |
| Find a Measurer | The CBH rating needs to be measured by an Australian Sailing Accredited Measurer. | Click here to find a Measurer |
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CBH Rating List The CBH rating list will be updated on a day to day basis with new measurements and new Classes as they come to hand.
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Alternate CBH Rating List Alternative listing of CBH showing primary calculations used. The CBH formula will be reviewed once a year on the 1st of July. |
Find a Measurer The CBH rating needs to be measured by an Australian Sailing Accredited Measurer.
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| NOTE: The rating formula is reviewed once a year and a new list is issued each year on the 1st of August. |
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Seeking Class measurements The Australian Sailing Rating office is still looking for some Class measurements. If you can provide measurements for a Class that is not listed in the new rating list, please contact the Rating Office, your help will be much appreciated: ratings@sailing.org.au or (02) 9170 6917 |
| FREQUENTLY ASKED QUESTIONS |
No, the new rating is a different formula than the old one.
To add a boat or a Class to the CBH list you need to contact the Ratings Office (ratings@sailing.org.au) or follow the steps found in the “NEW APPLICATION” paragraph at the top of the web page.
The CBH rating formula is not published to prevent the optimisation of a boat to “beat” the rating. The aim of the CBH is to be a simple rating system, cheap and easy to use. The aim of this rating is not to encourage boat modification outside of Class Rules.
There is a charge of $100.00 to add a boat or a Class to the list.
If a boat doesn’t comply with its Class Rules because it has been modified, then the owner will have to provide the new measurements for the boat and apply for an OAK (One of A Kind) CBH rating
Principles for re-weighing (In the absence of provenance):
- if the boat hasn’t been weighed for 10 years.
- if there has been a change of owner and the boat hasn’t been weighed for 5 years.
- if there has been an amendment to the boat which will effect the weight.
- if the load cell is outside accepted tolerances or not currently within a suitable calibration cycle (max is 2 years).
- if the source of the weight cannot be ascertained.
Where a yacht is required to be re-weighed it is the owner’s responsibility to arrange weighing. Australian Sailing can assist you to complete this task.
Files available for download
CBH 26-09-18
pdf