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Cobra 35
Designer: Don Karmin  ·  Builder: Karmin (Usa)  ·  First built: 1985
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About the Cobra 35

Designed by Don Karmin and introduced in 1985, this fiberglass catamaran represents an interesting approach to performance cruising from the mid-1980s era. The fractional sloop rig configuration provides excellent sail handling characteristics, while the twin centerboard system offers versatility for exploring both deeper waters and shallow anchorages. With moderate displacement for a 35-footer, the Cobra 35 strikes a balance between carrying capacity and sailing performance. The generous beam typical of catamarans delivers impressive interior volume and stability, making it well-suited for coastal cruising and weekend adventures. The twin hull design provides the shallow draft capabilities that catamaran enthusiasts appreciate, opening up gunkholes and beaches unavailable to deeper-draft monohulls. The sail area to displacement ratio suggests reasonable performance in light to moderate conditions, though like many cruising catamarans of this era, it may require attention to sail trim and boat handling to maximize speed potential. Built by Karmin in the USA, these boats represent American catamaran development during a period when multihull designs were gaining acceptance among recreational sailors. This design would appeal to sailors seeking the space, stability, and shallow-water access that catamarans provide, particularly for coastal and protected water sailing.

Core Dimensions
LOA (Length Overall) 35.00 ft / 10.67 m
Beam 18.00 ft / 5.49 m
Max Draft 4.83 ft / 1.47 m
Min Draft 1.16 ft / 0.35 m
Displacement 5,000.00 lb / 2,268 kg
Sail Area (Reported) 650.00 ft² / 60.39 m²
Design & Construction
Hull Type Catamaran Twin Cbrd.
Rigging Type Fractional Sloop
Construction FG
Designer Don Karmin
Builder Karmin (USA)
First Built 1985
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Performance Ratios
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
84.77
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
5.21
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
4.22
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.31 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 11.47 pounds/inch
Rig Dimensions
Mast Height (DWL) 49.00 ft / 14.94 m
Engine & Accommodations
Water Capacity 18 gals / 68 L
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