Age & Weight Requirements for Eligibility in JSA Events
  Age Range # of Sailors Weight Optimal Height*
Optimist 8-15 1 less than 140 lb. 5'7" or less
RS Feva 12-16 2 175-260 lb. combined 5'9" or less
Laser Radial 14 minimum 1 110 minimum no limits
Big Boat Team 14 minimum - no limits no limits


Apr 28, 2020 -- Posted by : Bill

The 23' Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. The Sonar has recently achieved status as an International Class.

Acrobat Icon Download the Sonar Rigging Manual (PDF)



  • Race competitively with three or four crew.
  • The Sonar surfs and planes readily downwind.
  • Well-balanced, inboard rudder.
  • Faster than a J/24 in windy conditions.
  • Strict one-design rules. 


  • Clean and uncluttered cockpit.
  • Small jib can be handled by nearly any size crew member.
  • Single jib, main, and spinnaker.
  • 7'10" beam for easy trailering. 


  • 11'6" cockpit seats 8 comfortably.
  • Full-length molded bench seats with angled backs.
  • Self-bailing cockpit.
  • Lockable cuddy under the foredeck holds gear, or an outboard motor, even a small Porta Potti.
  • 900 lb. keel keeps the boat stable and dry.

Sonar Specifications

Sonar Parts and Lines

There is already a lot of great information about the Sonar a mouse click away. Check out some of these great sites:




Boats in Our Program

Optimist Dinghy

A more detailed description of the Opti.

RS Feva

A more detailed description of the RS Feva

Laser Radial

A bit more detailed information about the Laser Radial


A brief description of the Sonar in our program.

Big Boat Program

A brief description of the big boat program in our club.

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