Byron Handicaps 2026

With reference to the Byron Class Number (ByCN) sailboat handicaps: if you would like to send data to help improve our knowledge base (as more/better data can amend a Class Number) or to get a specific boat rating (ByPN) then just complete and send the following form. It's basically a free service but if you want a priority response then a donation is required.

Our ByCN handicap web listings include a selection of twelve hundred plus boats, but we have data on several thousand different boat classes; many of these have numerous variations that effect a boat's handicap/rating.

Don't be 'put off' by all the questions!

We probably know most of the main detail already, but if you have other information that could influence the boat's performance, that is not covered by the form fields, then just add it to the Notes section.

It's often just the options/differences from the base class that we need to be told.

After sending the form below, we complete the calculations and the boat's ByPN rating is returned in an email format which includes the declared data. If a 'copy to' address is provided then the email is sent to both addresses. Presenting this ByPN email to a sailboat race organisor allows the boat's declared configuration to be clearly seen, many check this information for those who are race/prize winners and may penalise if incomplete/incorrect, so better to be safe than sorry...

A number of Open meeting race organisors/clubs prefer an email direct from ourselves to assure originality, just enter their email in the 'copy to' field; if you already have a current ByPN rating email then just add and send any changed data plus answer additional questions. Renewal/confirmation emails along with a financial contribution get priority treatment.

Your Email address:
Copy to: Email (if needed)
Owner Name:
Town, Country:
Sailing Club/Area (if any):
Sailing Club website (if any):

Best web address for Boat Class, detail and dimensions:
Boat Class/builder/type:

Boat Name:
Sail Letters / Numbers:
Build Year / Hull Series:

Units are measured in:
Boat Length (LOA):
Hull Length (HOA):
Waterline Length (LWL):
Boat Max.Beam:
Boat Max.Draft: (add Lift Min.Draft in Notes below )
Boat Empty Displacement:
Boat Sailing Displacement: (including crew weight )
Boat Hull is:
Hull Construction:
Weight of Internal Ballast: (describe in Notes: impacts boat heel angle calcs )
Boat Keel(s):
Keel Material:
Keel/External ballast Weight:
Rudder(s):
Engine/propeller:
Fuel Tank Capacity:
Hull fit out:

Rig Type:
Mast Material:
Air Draft: (Mast Height to DWL)
Fore Stay triangle I: (vertical from sheerline at mast)
Fore Stay triangle J: (stay to mast)
Head Sail K: (Luff Perpendicular)
Head Sail Luff length L: (sail: not forestay length)
Head Sail Furl/Reef:
Main Sail (mast band) P:
Main Sail (boom band) E:
Main Sail Battens/Roach:
Total sail area: (exclude area of spinnaker; if mainsail area known please add in Notes:)
Sail Material:

Spinnaker(s): (do ensure all are declared, use notes below if needed)
Symmetric spinnaker Area:
Asym/code sail or gennaker Area:
Asymmetric:

Pole:
Bowsprit:

Your Boat's handicap number: (+source):
Handicap needed for event or club/series:

Notes: include mainsail size, plus any extra sail sizes. Liferaft/tender carried? extra chain/anchor weight? mast mounted radar? bow thruster type? any crew hiking restrictions or aids?

Clicking on the above 'Send Request' button submits the form to our free list, after we receive the data a confirmation page is shown which also provides the opportunity to make a donation to help us fund this work and to ensure that your request is prioritised.

Home Index