Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/bulb & spade rudder
Rigging Type: Fractional Sloop
LOA: 12.19 m
LWL: 10.55 m
S.A. (reported): 80.36 m²
Beam: 3.63 m
Displacement: 6,759 kg
Ballast: 2,540 kg
Max Draft: 2.20 m
Construction: FG
Ballast Type: Lead
First Built: 2008
Builder: J Boats
Designer: Johnstone

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo
Type: Diesel
HP: 40
Fuel: 132 L


Water: 159 L

Sailboat Calculations

S.A. / Displ.: 22.94
Bal. / Displ.: 37.58
Disp: / Len: 160.59
Comfort Ratio: 23.46
Capsize Screening Formula: 1.94
S#: 3.97
Hull Speed: 7.88 kn
Pounds/Inch Immersion: 1,472.43 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 16.59 m
J: 4.63 m
P: 15.65 m
E: 5.36 m
ISP: 17.58 m
S.A. Fore: 38.42 m²
S.A. Main: 41.90 m²
S.A. Total (100% Fore + Main Triangles): 80.32 m²
S.A./Displ. (calc.): 22.93
Est. Forestay Length: 17.22 m

Sailboat Links

Designers: Rod Johnstone
Builders: J Boats
J Composites (FRA)
Download Boat Record:


J/122E (built in France) has same hull and rig with updated deck, coach roof, and interior.