Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 13.87 m
LWL: 11.43 m
S.A. (reported): 72.56 m²
Beam: 3.81 m
Displacement: 13,608 kg
Ballast: 3,629 kg
Max Draft: 1.52 m
Construction: FG
First Built: 1971
Last Built: 1975
# Built: 129
Builder: Jensen Marine (USA)
Designer: C. William Lapworth

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Type: Diesel
Fuel: 1,022 L


Water: 644 L

Sailboat Calculations

S.A. / Displ.: 13.00
Bal. / Displ.: 26.67
Disp: / Len: 253.97
Comfort Ratio: 40.21
Capsize Screening Formula: 1.61
S#: 1.73
Hull Speed: 8.21 kn
Pounds/Inch Immersion: 1,674.90 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 14.63 m
J: 5.49 m
P: 12.22 m
E: 5.31 m
S.A. Fore: 40.13 m²
S.A. Main: 32.43 m²
S.A. Total (100% Fore + Main Triangles): 72.57 m²
S.A./Displ. (calc.): 13.00
Est. Forestay Length: 15.62 m

Sailboat Links

Designers: C. William Lapworth
Builders: Jensen Marine/Cal Boats
Related Sailboats: CAL CRUISING 46
Download Boat Record:


A development from the earlier CAL 46 MS (CAL CRUISING 46). The differences between this and the earlier version:
The engine room has been moved forward to midships, the aft cabin moved further aft.
The main salon and the forward cabin have been enlarged.
This 'new' design, proved to be a huge success with 95 built.
Bill Lapworth has stated that this was his favorite design and a yacht that he actually owned.
The boat went through a third iteration in the mid-'70's that included smaller cabin windows and a different interior layout. All the 46's were based on the same hull.
Available as sloop or ketch.