Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Long Keel
Rigging Type: Fractional Sloop
LOA: 31.50 ft / 9.60 m
LWL: 21.65 ft / 6.60 m
S.A. (reported): 231.00 ft² / 21.46 m²
Beam: 6.23 ft / 1.90 m
Displacement: 3,748.00 lb / 1,700 kg
Max Draft: 3.61 ft / 1.10 m
Construction: Wood
Ballast Type: Iron
First Built: 1930
Designer: Gunnar L. Stenbäck

KLSC Leaderboard

KLSC Leaderboard

Sailboat Calculations

S.A. / Displ.: 15.36
Disp: / Len: 164.88
Comfort Ratio: 20.57
Capsize Screening Formula: 1.61
Hull Speed: 6.23 kn
Pounds/Inch Immersion: 481.94 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links

Builders: Jakobstads Båtvarv
Related Sailboats: REQUIN
Download Boat Record:


Originated in Finland. Hai in Finnish, Haj in Swedish (meaning "shark"). The builder's site as well as some old reference materials we've seen use Haj when translating to English. These boats are commonly referred to as Haj boats in the US.
From a number of different builders though Finnish one-design rules prohibit boats built with anything other than the originally specified materials (incl. wood spars and hull). Known as the REQUIN in France, where fiberglass hulls and aluminum spars are permitted.