Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 31.50 ft
LWL: 22.96 ft
S.A. (reported): 527.43 ft²
Beam: 9.84 ft
Displacement: 7,055.00 lb
Ballast: 3,197.00 lb
Max Draft: 5.25 ft
Construction: GRP
First Built: 1972
Builder: F Dekker & Son (NL)
Designer: Jacques Gaubert/André Mauric

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Bukh
Type: diesel
HP: 20
Fuel: 16 gals


Water: 53 gals
Headroom: 6.23 ft

Sailboat Calculations

S.A. / Displ.: 23.01
Bal. / Displ.: 45.32
Disp: / Len: 260.22
Comfort Ratio: 20.32
Capsize Screening Formula: 2.06
Hull Speed: 6.42 kn
Pounds/Inch Immersion: 807.26 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links


A stretched version of the Defender 27. The 27 was enlarged and the deck structure was also adapted by the Dekker Bros. The line drawing of Jaques Gaubert was enlarged by Gerrit Stam.
A shallow draft was also available: 1.45m / 4.75 ft.
Information about this model came from an owner's group site. Specs have not been verified.