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Sailboat Specifications

Gemini Cape Cod

Fractional Sloop · Twin Centerboards

Designed by Sidney Herreshoff · Built by Cape Cod Shipbuilding (Usa) · First built 1955

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LOA 16.08 ft  ·  Beam 5.58 ft  ·  Displacement 440.00 lb  ·  Sail Area 140.00 ft²  ·  Fractional Sloop  ·  Twin Centerboards
About the Gemini Cape Cod Sailboat

Designed by the renowned Sidney Herreshoff in 1955, this compact fractional sloop represents classic New England craftsmanship from Cape Cod Shipbuilding. With only 150 hulls produced, the Gemini Cape Cod has earned a reputation as a well-built daysailer that exemplifies traditional wooden boat construction enhanced by fiberglass components. At just over 16 feet, this shoal-draft design features twin centerboards that make it ideal for exploring shallow coastal waters, harbors, and protected bays. The generous beam of 5.58 feet provides surprising stability for such a compact hull, while the modest displacement of 440 pounds allows for easy launching and retrieval. The boat's SA/Displacement ratio of 38.77 indicates lively performance in light to moderate conditions, making it an excellent choice for recreational sailing and informal racing. The Gemini Cape Cod excels as a daysailer for small crews or families seeking an authentic sailing experience. Its comfortable cockpit and responsive handling make it particularly suitable for sailing instruction or leisurely afternoon sails. While not designed for extended cruising or offshore work, this boat shines in protected waters where its shallow draft and traditional lines can be fully appreciated by sailors who value classic design and proven seaworthiness.

Dimensions & Specifications
LOA (Length Overall) 16.08 ft / 4.90 m
LWL (Waterline Length) 14.75 ft / 4.50 m
Beam 5.58 ft / 1.70 m
Max Draft 3.33 ft / 1.01 m
Min Draft 0.58 ft / 0.18 m
Displacement 440.00 lb / 200 kg
Sail Area (Reported) 140.00 ft² / 13.01 m²
Design & Construction
Hull Type Twin Centerboards
Rigging Type Fractional Sloop
Construction Wood/FG
Designer Sidney Herreshoff
Builder Cape Cod Shipbuilding (USA)
First Built 1955
Number Built 150
Related Sailboats Rebel 16 · Comet Od Usa · Wayfarer · Com Pac 16 · Mc Scow
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Frequently Asked Questions

What is the Gemini Cape Cod's sail area to displacement ratio?

The Gemini Cape Cod has a Sail Area to Displacement ratio (SA/D) of 38.77. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Gemini Cape Cod's comfort ratio?

The Gemini Cape Cod has a Ted Brewer Comfort Ratio of 4.54. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Gemini Cape Cod safe for offshore sailing?

The Gemini Cape Cod has a Capsize Screening Formula value of 2.94. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Gemini Cape Cod?

The theoretical hull speed of the Gemini Cape Cod is 5.15 kn knots, calculated from its waterline length.

How much does a Gemini Cape Cod weigh?

The Gemini Cape Cod has a displacement of 440.00 lb and a length overall (LOA) of 16.08 ft.

Who designed the Gemini Cape Cod?

The Gemini Cape Cod was designed by Sidney Herreshoff, first built in 1955.