Class History

Designed in 1979 by Bruce Kirby (father of the Laser® and I-14, as well as editor of Sailing World's predecessor, Yacht Racing), the 23-foot Sonar is popular for its combination of comfort, speed, and ease of handling. This trailerable Bermuda rig, sailed by a crew of 3 to 5, seats up to 8 people and has a deep keel for stability. The Sonar's generous cockpit appealed to both disabled and able-bodied sailors. It became Europe's first Paralympic sailing class in 1996. The American Sailboat Hall of Fame inducted the Sonar in 2000 as a boat that is friendly to new sailors, exciting for club racers, and fun for day sailing. sonar_sailplan.gif

Boat Specifications

LOA: 23'0" (7.0 m)
LWL: 19'11" (6.1 m)
BEAM: 7'10" (2.4 m)
DRAFT: 3'11" (1.2 m)
DISP: 2100 lb (950 kg)
BALLAST: 900 lb (408 kg)
MAIN & JIB: 250 sq ft (23.2 sq m)
SPIN: 245 sq ft (22.8 sq m)



Sonar Jib Halyard Fine-Tune System345 29mm Carbo Triple/Becket344 29mm Carbo Triple2636 40mm Carbo Single

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Jib Halyard Fine-Tune

This high-power jib halyard fine-tune allows you to tension the luff as the wind cranks up. When you need headstay sag to power up the jib in chop and light air, the fine-tune allows quick control over headstay tension, making it easier to insert mast chocks.

Sonar Mainsheet Bridle and Jib Sheet Coarse/Fine-Tune Systems2655 40mm Carbo Fiddle2135 57mm Carbo Ratchet144 Cam Swivel Base2731 22mm Traveler with Stand-up Toggle348 29mm Carbo Fixed Single264 22mm Heavy-Duty High-Beam Track Endstop2731 22mm Traveler with Stand-up Toggle2725.1.2M 22mm High-Beam Traveler Track350 29mm Carbo Cheek350 29mm Carbo Cheek350 29mm Carbo Cheek350 29mm Carbo Cheek150 Cam-Matic Cam Cleat150 Cam-Matic Cam Cleat2707.600MM 13mm Traveler Track2636 40mm Carbo Single2700 13mm Micro Traveler Car2682 75mm Carbo Ratchamtic Cheek341 29mm Carbo Single/Becket471 Micro Carbo-Cam424 Micro Cam Fairlead

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Mainsheet Bridle

Upgrading to a bridle can make your system self-tacking in 10-20 knots and downwind while reducing the adjustments needed in other wind ranges. Simply add a second low-friction Harken 2731 car and use Spectra® strops about 28 inches long. The length of the bridle straps is key so you can sheet in hard to center the boom without closing off the leach.

Jib Sheet Coarse/Fine-Tune

This hand-trimmed 6:1 system has a gross-trim for speed in quick tacks and a fine-tune for precise, fingertip control in any breeze.

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