Beta Marine

Sailboat Specifications

Hull Type: Centerboard Dinghy
Rigging Type: Fractional Sloop
LOA: 5.49 m
LWL: 5.11 m
S.A. (reported): 19.51 m²
Beam: 1.83 m
Displacement: 386 kg
Ballast: 91 kg
Max Draft: 0.91 m
Min Draft: 0.27 m
Construction: Wood/FG
First Built: 1911
# Built: 115
Designer: Morgan-Giles

KLSC Leaderboard

Sailboat Calculations

S.A. / Displ.: 37.51
Bal. / Displ.: 23.53
Disp: / Len: 80.75
Comfort Ratio: 7.05
Capsize Screening Formula: 2.54
Hull Speed: 5.48 kn
Pounds/Inch Immersion: 359.10 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links

Designers: Francis Charles Morgan-Giles
Norman Edward Dallimore
Associations: Estuary One Design
Download Boat Record:


Originally commisioned by the Alexanra Yacht Club and the Essex Yacht Club in 1911 for sailing around the Thames estuary. (UK) It was somewhat eclipsed after WWI by a new but similar design which became the ESSEX ONE-DESIGN (1919, also by Morgan-Giles).
In 1950, designer, Norman Dallimore was retained to create a standardized set of drawings for the THAMES ESTUARY ONE-DESIGN, with a new sailplan and updated specifications.
A new FG version was developed in 1966 when the TEOD merged with the ESSEX ONE-DESIGN. See the class website for more information.