Apr 28, 2020 -- Posted by : Bill

The 23' Sonar one-design keelboat is a high-performance racer and a comfortable daysailor just right to get the entire family or friends on the water together. Bruce Kirby designed it, 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 as 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.
  • Nearly any size crew member can handle the small jib.
  • 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 / ILCA 6

A bit more detailed information about the Laser Radial / ILCA 6

Club 420

A bit more detailed information about the Club 420


A brief description of the Sonar in our program.

Big Boat Program

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

JSALIS_Marguee.pngJSA of LIS


RS-Feva.pngRS Feva

Laser Marquee.pngLaser

Lisot Marquee.pngLISOT

HYC Lasers Marquee.pngLaser Frostbite



ussailing_Marquee.pngUS Sailing


HYC_Burgee Marquee.pngHuguenot Yacht Club