Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Keel/Cbrd.
Rigging Type: Masthead Sloop
LOA: 33.08 ft / 10.08 m
LWL: 22.92 ft / 6.99 m
S.A. (reported): 502.00 ft² / 46.64 m²
Beam: 10.00 ft / 3.05 m
Displacement: 11,500.00 lb / 5,216 kg
Ballast: 3,400.00 lb / 1,542 kg
Max Draft: 6.58 ft / 2.01 m
Min Draft: 3.50 ft / 1.07 m
Construction: FG
First Built: 1959
Last Built: 1965
# Built: 150
Builder: deVries Lentch, Inc. / Royal Netherlands Aircraft
Designer: Philip Rhodes

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Universal
Model: Atomic 4
Type: Gas
HP: 30
Fuel: 28 gals / 106 L


Water: 60 gals / 227 L

Sailboat Calculations

S.A. / Displ.: 15.82
Bal. / Displ.: 29.57
Disp: / Len: 426.39
Comfort Ratio: 31.87
Capsize Screening Formula: 1.78
S#: 0.95
Hull Speed: 6.42 kn
Pounds/Inch Immersion: 818.96 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 38.73 ft / 11.80 m
J: 12.87 ft / 3.92 m
P: 34.18 ft / 10.42 m
E: 14.70 ft / 4.48 m
S.A. Fore: 249.23 ft² / 23.15 m²
S.A. Main: 251.22 ft² / 23.34 m²
S.A. Total (100% Fore + Main Triangles): 500.45 ft² / 46.49 m²
S.A./Displ. (calc.): 15.77
Est. Forestay Length: 40.81 ft / 12.44 m

Sailboat Links

Designers: Philip Rhodes
Builders: Amsterdam Shipyard G. de Vries Lentsch
Seafarer Yachts
Download Boat Record:


Rhodes Design #692
The original design, and a later model marketed as the COMMODORE SWIFTSURE, were both sold through Seafarer Yachts. They share the same hull shape, exterior deck layout, and sailplan (displacement and ballast differ slightly).
The first boats, built by G. deVries Lentch, Inc., have a permanently-fixed cabin table with two leaves that fold down when not in use. At the aft end of the table is a hollow stainless pole that runs from the cabin sole to the bottom of the cabin ceiling, through which, runs a housing for the centerboard control cable.
The later model, mostly built by Royal Netherlands Aircraft, has a cabin table which completely folds away when not in use, as well as a new centerboard mechanism which operated by a control cable routed inside the port cabinetry.
The original SWIFTSURE has bronze deck hardware and fittings, and mahogany trim, while the COMMODORE version is fitted with stainless steel and aluminum hardware with teak trim.