Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 47.64 ft
LWL: 40.08 ft
S.A. (reported): 1,175.00 ft²
Beam: 15.54 ft
Displacement: 34,480.00 lb
Ballast: 15,653.00 lb
Max Draft: 8.25 ft
Construction: FG
Ballast Type: Lead
First Built: 1988
Builder: Jonmeri (FIN)
Designer: Jorma Nyman/Karl-Johan Stråhlmann

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo Penta
Model: TMB 31
Type: Diesel
Fuel: 158 gals


Water: 200 gals

Sailboat Calculations

S.A. / Displ.: 17.82
Bal. / Displ.: 45.40
Disp: / Len: 239.08
Comfort Ratio: 32.60
Capsize Screening Formula: 1.91
S#: 2.36
Hull Speed: 8.48 kn
Pounds/Inch Immersion: 2,225.49 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 65.62 ft
J: 18.86 ft
P: 60.41 ft
E: 18.40 ft
S.A. Fore: 618.80 ft²
S.A. Main: 555.77 ft²
S.A. Total (100% Fore + Main Triangles): 1,174.57 ft²
S.A./Displ. (calc.): 17.81
Est. Forestay Length: 68.28 ft

Sailboat Links

Designers: Karl-Johan Stråhlmann
Builders: Jonmeri Yachts
Maestro Boats (FIN)
Download Boat Record:


Updated by Stråhlmann. Several layouts available.
A version without the 'Deck Salon' is called the JONMERI 482.