Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 30.00 ft
LWL: 26.92 ft
S.A. (reported): 474.00 ft²
Beam: 10.17 ft
Displacement: 9,200.00 lb
Ballast: 4,100.00 lb
Max Draft: 5.00 ft
Construction: FG
First Built: 1976
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

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Sailboat Calculations

S.A. / Displ.: 17.33
Bal. / Displ.: 44.57
Disp: / Len: 210.53
Comfort Ratio: 23.25
Capsize Screening Formula: 1.94
S#: 2.62
Hull Speed: 6.95 kn
Pounds/Inch Immersion: 978.23 pounds/inch

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2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 41.68 ft
J: 13.50 ft
P: 35.00 ft
E: 11.00 ft
S.A. Fore: 281.34 ft²
S.A. Main: 192.50 ft²
S.A. Total (100% Fore + Main Triangles): 473.84 ft²
S.A./Displ. (calc.): 17.32
Est. Forestay Length: 43.81 ft
Mast Height from DWL: 45.50 ft

Sailboat Links

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


Shoal draft version: 3.92'.
Keel/CB draft: BU:4.3' BD: 8.3'