SIGMA 18

Fractional Sloop • Fin w/transom hung rudder • Built 1979–1980

Dimensions

LOA: 17.5 ft
LWL: 15.25 ft
Beam: 6.33 ft
Max Draft: 2 ft
Displacement: 1,220 lbs
Ballast: 450 lbs

Performance Ratios

Capsize Ratio ⓘ: 2.37 (use caution offshore)
SA/D Ratio ⓘ: 21.0
D/L Ratio ⓘ: 154
Ballast Ratio ⓘ: 36.9%

Sail Plan

Sail Area: 150 sq ft

Construction

Hull Type: Fin w/transom hung rudder
Rig Type: Fractional Sloop
Hull Material: FG
Ballast Type: —

Production

First Built: 1979
Last Built: 1980
Number Built: —

Notes:

Originally the TANGERINE 18. Relatively few built as SIGMA 18. The molds were purchased by Renkin, primarily, a builder of powerboats, where it became the RENKIN 18.

Related Boats

Name	LOA (ft)	Year	Rig
RENKIN 18	17.5	1977	Fractional Sloop
TANGERINE 18	17.5	1977	Fractional Sloop