Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 37.58 ft
LWL: 29.50 ft
S.A. (reported): 745.00 ft²
Beam: 11.25 ft
Displacement: 17,280.00 lb
Max Draft: 5.33 ft
Construction: FG
First Built: 1977
# Built: 63
Builder: Rival/Southern Boatbuilding Co. Ltd. (UK)
Designer: Peter Brett

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Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Model: 4.108
Type: Diesel
HP: 38
Fuel: 130 gals


Water: 110 gals

Sailboat Calculations

S.A. / Displ.: 17.90
Disp: / Len: 300.49
Comfort Ratio: 33.30
Capsize Screening Formula: 1.74
S#: 1.55
Hull Speed: 7.28 kn
Pounds/Inch Immersion: 1,185.83 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 48.40 ft
J: 14.33 ft
P: 37.60 ft
E: 13.75 ft
S.A. Fore: 346.79 ft²
S.A. Main: 258.50 ft²
S.A. Total (100% Fore + Main Triangles): 605.29 ft²
S.A./Displ. (calc.): 14.54
Est. Forestay Length: 50.48 ft

Sailboat Links

Designers: Peter Brett
Builders: Marine Construction Ltd. (UK)
Associations: Rival Owners Association
Download Boat Record:


The standard version (RIVAL 38A) has an aft cockpit. Some of these were rigged as Cutters. A center cockpit version was also available, as was a ketch rig. See the Rival Owners Site for more details.