Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Keel/Cbrd.
Rigging Type: Masthead Yawl
LOA: 37.75 ft
LWL: 25.00 ft
S.A. (reported): 558.00 ft²
Beam: 10.58 ft
Displacement: 15,000.00 lb
Ballast: 5,650.00 lb
Max Draft: 7.70 ft
Min Draft: 4.50 ft
Construction: FG
Ballast Type: Lead
First Built: 1960
Last Built: 1965
# Built: 21
Builder: Pearson Yachts (USA)
Designer: William Tripp

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Universal
Model: Atomic 4
Type: Gas
HP: 20
Fuel: 25 gals

Sailboat Calculations

S.A. / Displ.: 14.73
Bal. / Displ.: 37.67
Disp: / Len: 428.57
Comfort Ratio: 34.74
Capsize Screening Formula: 1.72
S#: 0.89
Hull Speed: 6.70 kn
Pounds/Inch Immersion: 945.09 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 38.50 ft
J: 15.20 ft
P: 33.00 ft
E: 16.10 ft
PY: 16.00 ft
EY: 8.20 ft
S.A. Fore: 292.60 ft²
S.A. Main: 265.65 ft²
S.A. Total (100% Fore + Main Triangles): 558.25 ft²
S.A./Displ. (calc.): 14.74
Est. Forestay Length: 41.39 ft

Sailboat Links

Designers: William H. Tripp Jr.
Builders: Pearson Yachts
Associations: Pearson Yacht Owners Portal
Related Sailboats: INVICTA II (TRIPP)
Download Boat Record:


The first 2 boats, based on this design, were built by Palmer Johnson. (1959). It is thought that Pearson purchased the molds from them and extended the LOA by 1'8", though this is disputed by some. This flush deck version was superseded, in 1964, by the INVICTA II with a standard coach roof.

(Thanks to Nanette Blish, and Dave Bricker, both former INVICTA owners, for supplying updated information on this model.)