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Sailboat Specifications

Gk 34 Westerly

Fractional Sloop · Fin W/Spade Rudder

Designed by Ed Dubois · Built by Westerly Marine Ltd. (Uk) · First built 1980

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LOA 34.00 ft  ·  Beam 11.25 ft  ·  Displacement 8,400.00 lb  ·  Sail Area 512.50 ft²  ·  Fractional Sloop  ·  Fin W/Spade Rudder
About the Gk 34 Westerly Sailboat

Designed by renowned naval architect Ed Dubois during his early career, this distinctive 34-footer represents a brief but notable chapter in Westerly Marine's history. With only 17 hulls produced between 1980 and 1981, the GK 34 has become something of a rare find among British sailing yachts of the era. The design showcases Dubois' emerging talent for creating performance-oriented cruising boats. Her fin keel and spade rudder configuration, combined with a fractional sloop rig, delivers responsive handling that appeals to sailors who appreciate a spirited sail. The substantial ballast-to-displacement ratio of nearly 55% provides reassuring stability, while the moderate comfort ratio of 17.48 suggests she's built more for sailing performance than purely luxurious accommodation. With a sail area to displacement ratio approaching 20, the GK 34 offers lively performance in light to moderate conditions, making her well-suited for coastal cruising and club racing. Her hull speed of just over 7 knots and seaworthy construction make longer passages feasible, though her relatively small production run means finding parts or experienced mechanics familiar with her systems may require extra effort. For sailors seeking a distinctive British yacht with proven pedigree, the GK 34 offers both performance and exclusivity.

Dimensions & Specifications
LOA (Length Overall) 34.00 ft / 10.36 m
LWL (Waterline Length) 27.67 ft / 8.43 m
Beam 11.25 ft / 3.43 m
Max Draft 6.25 ft / 1.91 m
Displacement 8,400.00 lb / 3,810 kg
Ballast 4,600.00 lb / 2,087 kg
Ballast Type cast iron
Sail Area (Reported) 512.50 ft² / 47.61 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Ed Dubois
Builder Westerly Marine Ltd. (UK)
First Built 1980
Last Built 1981
Number Built 17
Associations Westerly Owners Association
Related Sailboats Vulcan 34 Westerly · Contest 34 · Rival 34 · Catalina 34 · Oday 34
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Engine & Accommodations
Engine Make Bukh
Engine Model DV20ME
Engine Type Diesel
Horsepower 20
Fuel Capacity 15 gals / 57 L
Water Capacity 30 gals / 114 L
Frequently Asked Questions

What is the Gk 34 Westerly's sail area to displacement ratio?

The Gk 34 Westerly has a Sail Area to Displacement ratio (SA/D) of 19.91. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Gk 34 Westerly's comfort ratio?

The Gk 34 Westerly has a Ted Brewer Comfort Ratio of 17.48. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Gk 34 Westerly safe for offshore sailing?

The Gk 34 Westerly has a Capsize Screening Formula value of 2.22. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Gk 34 Westerly?

The theoretical hull speed of the Gk 34 Westerly is 7.05 kn knots, calculated from its waterline length.

How much does a Gk 34 Westerly weigh?

The Gk 34 Westerly has a displacement of 8,400.00 lb and a length overall (LOA) of 34.00 ft.

Who designed the Gk 34 Westerly?

The Gk 34 Westerly was designed by Ed Dubois, first built in 1980.