Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Long Keel
Rigging Type: Masthead Sloop
LOA: 39.75 ft
LWL: 28.00 ft
S.A. (reported): 742.00 ft²
Beam: 10.75 ft
Displacement: 20,720.00 lb
Ballast: 7,900.00 lb
Max Draft: 6.00 ft
Construction: FG
Ballast Type: Iron
First Built: 1964
Last Built: 1976
# Built: 156
Builder: Cheoy Lee Shipyard Ltd.(HK)
Designer: Philip Rhodes

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Fuel: 30 gals


Water: 100 gals

Sailboat Calculations

S.A. / Displ.: 15.80
Bal. / Displ.: 38.13
Disp: / Len: 421.37
Comfort Ratio: 42.96
Capsize Screening Formula: 1.57
S#: 0.97
Hull Speed: 7.09 kn
Pounds/Inch Immersion: 1,075.51 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 47.00 ft
J: 15.83 ft
P: 41.25 ft
E: 18.00 ft
S.A. Fore: 372.01 ft²
S.A. Main: 371.25 ft²
S.A. Total (100% Fore + Main Triangles): 743.26 ft²
S.A./Displ. (calc.): 15.82
Est. Forestay Length: 49.59 ft

Sailboat Links

Designers: Philip Rhodes
Builders: Cheoy Lee Shipyard
Associations: Cheoy Lee Association Web Site
Related Sailboats: RHODES RELIANT 41
Download Boat Record:


Also known as the EMPIRE 40 and a variant of the RHODES RELIANT 41, all from the same builder. The OFFSHORE/EMPIRE 40 was created in an effort to reduce costs of contruction and design royalties of the RHODES RELIANT. Although from the same basic tooling, the OFFSHORE 40 has iron instead of lead ballast, and differences in other construction details. Sold as a sloop or yawl.
In the mid 1970's, Cheoy Lee Yard built another OFFSHORE 40 (variously designated as the OFFSHORE 4O MKII and then OFFSHORE 41), which was a different boat entirely and thought to be designed by Raymond Richards). See OFFSHORE 41.
(Variants of both the Rhodes and Richards design were at one time offered at one time or another under the names OFFSHORE 40 and OFFSHORE 41.)
Also offered with a yawl rig.
Photo from original Cheoy Lee literature.