Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Keel/Cbrd.
Rigging Type: Staysail Ketch
LOA: 64.83 ft
LWL: 55.00 ft
S.A. (reported): 1,895.00 ft²
Beam: 17.33 ft
Displacement: 78,500.00 lb
Ballast: 23,500.00 lb
Max Draft: 5.75 ft
Construction: FG
First Built: 1981
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Model: 853H
Type: Diesel
HP: 240
Fuel: 620 gals


Water: 950 gals

Sailboat Calculations

S.A. / Displ.: 16.62
Bal. / Displ.: 29.94
Disp: / Len: 210.64
Comfort Ratio: 46.91
Capsize Screening Formula: 1.62
S#: 2.44
Hull Speed: 9.94 kn
Pounds/Inch Immersion: 3,405.71 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 75.50 ft
J: 26.50 ft
P: 69.00 ft
E: 23.00 ft
PY: 14.50 ft
EY: 14.00 ft
S.A. Fore: 1,000.38 ft²
S.A. Main: 793.50 ft²
S.A. Total (100% Fore + Main Triangles): 1,793.88 ft²
S.A./Displ. (calc.): 15.73
Est. Forestay Length: 80.02 ft

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: Irwin Facebook Group
Irwin Yacht Owners
Download Boat Record:


LOA w/bowsprit: 72.0'
Thanks to '7THHEAVEN' for providing corrections.