Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Full Keel
Rigging Type: Masthead Ketch
LOA: 50.00 ft
LWL: 41.50 ft
S.A. (reported): 1,040.00 ft²
Beam: 13.17 ft
Displacement: 55,115.00 lb
Max Draft: 6.25 ft
Construction: Ferro Cement
Ballast Type: Cement and Ferrous material
First Built: 1974
# Built: 4
Builder: Various
Designer: Wilf O'Kell

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Type: Diesel
HP: 60
Fuel: 132 gals


Water: 317 gals
Headroom: 6.33 ft

Sailboat Calculations

S.A. / Displ.: 11.54
Disp: / Len: 344.25
Comfort Ratio: 62.43
Capsize Screening Formula: 1.39
Hull Speed: 8.63 kn
Pounds/Inch Immersion: 1,952.90 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

Mast Height from DWL: 55.77 ft

Sailboat Links

Download Boat Record:


Wilf O’Kell, a NZ designer who later moved to Australia.
Also designed to offer a flush deck option.
Sail area above is 100% fore triangle.
Main: 410 ft²
Mizzen: 213 ft²
Genoa: 615 ft²
#1 Jib: 354 ft²
#2 Jib: 190 ft²
Mizzen Stay sail: 460 ft²
Storm Tri sail: 160 ft²