Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Staysail Ketch
LOA: 12.00 m
LWL: 11.45 m
S.A. (reported): 70.98 m²
Beam: 3.43 m
Displacement: 12,000 kg
Ballast: 4,500 kg
Max Draft: 1.85 m
Construction: FG
First Built: 1973
# Built: 8
Builder: Alpa (ITA)
Designer: Sparkman & Stephens

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Diesel
Model: Perkins
Fuel: 201 L


Water: 401 L

Sailboat Calculations

S.A. / Displ.: 13.82
Bal. / Displ.: 37.50
Disp: / Len: 222.71
Comfort Ratio: 42.71
Capsize Screening Formula: 1.51
S#: 1.80
Hull Speed: 8.21 kn
Pounds/Inch Immersion: 1,510.22 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 14.71 m
J: 4.42 m
P: 13.06 m
E: 4.19 m
PY: 8.15 m
EY: 2.74 m
S.A. Fore: 32.50 m²
S.A. Main: 27.37 m²
S.A. Total (100% Fore + Main Triangles): 59.87 m²
S.A./Displ. (calc.): 11.66
Est. Forestay Length: 15.36 m

Sailboat Links

Designers: Sparkman & Stephens
Builders: Alpa Yachts (ITA)
Download Boat Record:


From the same hull mold used to built the ALPA 12.7 (1969).
The tooling was later purchased by the Zuanelli yard where, with a few modifications, it became the Zuanelli 42.