Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Fractional Sloop
LOA: 36.00 ft
LWL: 28.50 ft
S.A. (reported): 631.00 ft²
Beam: 11.92 ft
Displacement: 8,510.00 lb
Ballast: 3,411.00 lb
Max Draft: 6.08 ft
Construction: FG
Ballast Type: Lead
First Built: 1975
Builder: Holmes (AUS)
Designer: Bruce Farr

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Yanmar
Type: Diesel
Fuel: 29 gals


Water: 63 gals

Sailboat Calculations

S.A. / Displ.: 24.30
Bal. / Displ.: 40.08
Disp: / Len: 164.11
Comfort Ratio: 15.77
Capsize Screening Formula: 2.34
S#: 4.07
Hull Speed: 7.15 kn
Pounds/Inch Immersion: 1,213.86 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 42.33 ft
J: 12.56 ft
P: 43.96 ft
E: 16.60 ft
S.A. Fore: 265.83 ft²
S.A. Main: 364.87 ft²
S.A. Total (100% Fore + Main Triangles): 630.70 ft²
S.A./Displ. (calc.): 24.29
Est. Forestay Length: 44.15 ft

Sailboat Links

Designers: Bruce Farr
Builders: Compass Yachts Ltd. (Australia/NZ)
Associations: One Ton Class
Download Boat Record:


From an IOR 1 ton prototype. (1975 - Farr #51 'Prospect of Ponsonby').
Built in both Australia and New Zealand.