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Sailboat Specifications

Estuary One Design Uk

Fractional Sloop · Centerboard Dinghy

Designed by Morgan-Giles · First built 1911

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LOA 18.00 ft  ·  Beam 6.00 ft  ·  Displacement 850.00 lb  ·  Sail Area 210.00 ft²  ·  Fractional Sloop  ·  Centerboard Dinghy
About the Estuary One Design Uk Sailboat

Dating back to 1911, this classic Morgan-Giles design represents over a century of refined sailing heritage. With just 115 hulls built, the Estuary One Design UK holds distinction as an exclusive centerboard dinghy that bridges traditional craftsmanship with practical sailing performance. At 18 feet overall with a modest 6-foot beam, this fractional sloop-rigged vessel offers an ideal platform for coastal day sailing and competitive racing. The centerboard configuration provides versatility for exploring shallow estuaries and protected waters, while the 850-pound displacement ensures reasonable stability for crew comfort. Wood and fiberglass construction reflects both its historical origins and practical durability needs. The boat's sail area of 210 square feet delivers spirited performance without overwhelming smaller crews, making it well-suited for club racing and recreational sailing. Its relatively light 200-pound ballast suggests this design relies more on crew weight and sailing technique than pure stability, characteristic of responsive dinghies that reward skilled handling. With a hull speed of 5.48 knots and moderate comfort ratio, the Estuary One Design appeals to sailors seeking a traditional sailing experience with competitive potential. This rare design offers collectors and enthusiasts access to a piece of British sailing history while maintaining practical modern sailing capabilities.

Dimensions & Specifications
LOA (Length Overall) 18.00 ft / 5.49 m
LWL (Waterline Length) 16.75 ft / 5.11 m
Beam 6.00 ft / 1.83 m
Max Draft 3.00 ft / 0.91 m
Min Draft 0.90 ft / 0.27 m
Displacement 850.00 lb / 386 kg
Ballast 200.00 lb / 91 kg
Sail Area (Reported) 210.00 ft² / 19.51 m²
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction Wood/FG
Designer Morgan-Giles
First Built 1911
Number Built 115
Associations Estuary One Design
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Frequently Asked Questions

What is the Estuary One Design Uk's sail area to displacement ratio?

The Estuary One Design Uk has a Sail Area to Displacement ratio (SA/D) of 37.51. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Estuary One Design Uk's comfort ratio?

The Estuary One Design Uk has a Ted Brewer Comfort Ratio of 7.05. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Estuary One Design Uk safe for offshore sailing?

The Estuary One Design Uk has a Capsize Screening Formula value of 2.54. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Estuary One Design Uk?

The theoretical hull speed of the Estuary One Design Uk is 5.48 kn knots, calculated from its waterline length.

How much does a Estuary One Design Uk weigh?

The Estuary One Design Uk has a displacement of 850.00 lb and a length overall (LOA) of 18.00 ft.

Who designed the Estuary One Design Uk?

The Estuary One Design Uk was designed by Morgan-Giles, first built in 1911.