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Sailboat Specifications

Gulfstar 43 Ms

Masthead Sloop · Long Keel

Designed by Lazarra · Built by Gulfstar Yachts (Usa) · First built 1971

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LOA 43.33 ft  ·  Beam 13.92 ft  ·  Displacement 21,000.00 lb  ·  Sail Area 660.00 ft²  ·  Masthead Sloop  ·  Long Keel
About the Gulfstar 43 Ms Sailboat

Built during the early 1970s boom in American fiberglass yacht production, this Lazarra-designed motorsailer represents Gulfstar's attempt to bridge the gap between pure sailing performance and motor-powered practicality. With only ten hulls completed between 1971 and 1973, the 43 Ms remains a rare find in today's used boat market. The design features a traditional long keel configuration that provides excellent tracking and seaworthiness, making this vessel well-suited for coastal cruising and short offshore passages. Her substantial 21,000-pound displacement and conservative sail plan create a stable, comfortable platform that prioritizes safety over speed. The masthead sloop rig delivers manageable sail handling for cruising couples, while the generous beam of nearly 14 feet provides spacious accommodations below. With a comfort ratio of 24.08, this boat falls squarely into the comfortable cruising category, though her moderate draft of 3.5 feet allows access to shallower anchorages than many deeper-keeled contemporaries. The motorsailer configuration means she likely features a substantial engine installation, making her particularly appealing to cruisers who value reliable auxiliary power for calm conditions or tight maneuvering situations.

Dimensions & Specifications
LOA (Length Overall) 43.33 ft / 13.21 m
LWL (Waterline Length) 39.17 ft / 11.94 m
Beam 13.92 ft / 4.24 m
Max Draft 3.50 ft / 1.07 m
Displacement 21,000.00 lb / 9,525 kg
Sail Area (Reported) 660.00 ft² / 61.32 m²
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Sloop
Construction FG
Designer Lazarra
Builder Gulfstar Yachts (USA)
First Built 1971
Last Built 1973
Number Built 10
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Frequently Asked Questions

What is the Gulfstar 43 Ms's sail area to displacement ratio?

The Gulfstar 43 Ms has a Sail Area to Displacement ratio (SA/D) of 13.93. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Gulfstar 43 Ms's comfort ratio?

The Gulfstar 43 Ms has a Ted Brewer Comfort Ratio of 24.08. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Gulfstar 43 Ms safe for offshore sailing?

The Gulfstar 43 Ms has a Capsize Screening Formula value of 2.02. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Gulfstar 43 Ms?

The theoretical hull speed of the Gulfstar 43 Ms is 8.39 kn knots, calculated from its waterline length.

How much does a Gulfstar 43 Ms weigh?

The Gulfstar 43 Ms has a displacement of 21,000.00 lb and a length overall (LOA) of 43.33 ft.

Who designed the Gulfstar 43 Ms?

The Gulfstar 43 Ms was designed by Lazarra, first built in 1971.