Built by Marine Projects Ltd. in the UK starting in 1979, the Sigma 33 C represents David Thomas's approach to creating a versatile coastal cruiser with respectable performance characteristics. This 32.5-foot masthead sloop strikes a practical balance between comfort and sailing ability, making it well-suited for weekend coastal adventures and extended cruising in protected waters. The design features a modern fin keel with spade rudder configuration that provides good maneuverability and responsive handling. With a displacement of 9,500 pounds and 497 square feet of sail area, the boat offers moderate performance without sacrificing stability. The comfort ratio of 22.78 suggests a motion that's acceptably gentle for cruising, while the capsize screening value of 1.99 indicates reasonable stability for coastal conditions. Thomas designed the Sigma 33 C with practicality in mind, creating generous interior volume within the 10.5-foot beam. The fiberglass construction ensures durability and relatively low maintenance, important considerations for cruising sailors. While not a speed demon, this yacht delivers reliable passage-making capability with a theoretical hull speed approaching 7 knots, supported by an 18-horsepower auxiliary engine for calm conditions or tight marina work.
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What is the Sigma 33 C's sail area to displacement ratio?
The Sigma 33 C has a Sail Area to Displacement ratio (SA/D) of 17.79. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Sigma 33 C's comfort ratio?
The Sigma 33 C has a Ted Brewer Comfort Ratio of 22.78. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Sigma 33 C safe for offshore sailing?
The Sigma 33 C has a Capsize Screening Formula value of 1.99. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Sigma 33 C?
The theoretical hull speed of the Sigma 33 C is 6.87 kn knots, calculated from its waterline length.
How much does a Sigma 33 C weigh?
The Sigma 33 C has a displacement of 9,500.00 lb and a length overall (LOA) of 32.50 ft.
How much does a used Sigma 33 C cost?
Based on 1 recent market listings, used Sigma 33 C sailboats typically sell for between $15,000 and $15,000, with a median asking price of $15,000. Price varies significantly based on year, condition, location, and included equipment.
Who designed the Sigma 33 C?
The Sigma 33 C was designed by David Thomas, first built in 1979.