Designed by legendary naval architect John Alden in 1925, this compact fractional sloop represents classic New England craftsmanship from sailing's golden age. With 250 hulls built primarily by Graves Yacht Yard and George Chaisson, the O Class Mk II earned recognition as a well-balanced small cruiser that punches above its weight class. At just over 18 feet overall, this wooden centerboard design offers surprising versatility for coastal exploration and weekend cruising. The generous beam of 6.67 feet provides good initial stability, while the moderate displacement of 2,000 pounds keeps her manageable for single-handed sailing or small crews. The centerboard trunk configuration allows access to shallow harbors and gunkholes that deeper-draft vessels cannot reach, making her ideal for exploring New England's intricate coastlines. The fractional sloop rig with 192 square feet of sail area delivers respectable performance without overwhelming the crew. Her comfort ratio of 15.18 suggests quick, lively motion that responds well to sailing conditions, while the capsize screening value of 2.12 indicates reasonable stability for protected waters. Hull speed calculations show she'll cruise comfortably at around 5 knots, making her perfect for leisurely day sailing and short coastal passages where the journey matters more than speed.
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