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.

Please see the Sonar Rigging Manual in pdf format.

• 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.