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First 235 Sk Beneteau
Designer: Group Finot  ·  Builder: Beneteau  ·  First built: 1986
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About the First 235 Sk Beneteau

Designed by Group Finot and launched in 1986, this compact Beneteau represents an intriguing blend of coastal cruising capability and trailerable convenience. The swing keel configuration is the boat's defining feature, allowing the draft to be reduced for shallow water exploration, launching from ramps, and simplified storage. At just over 23 feet, the First 235 SK punches above its weight class with nearly 250 square feet of sail area driving a moderate displacement hull. The fractional sloop rig provides good sail handling characteristics, while the relatively high sail area to displacement ratio of 20.65 suggests spirited performance in light to moderate conditions. The swing keel design does present trade-offs, as the ballast-to-displacement ratio indicates less ultimate stability than a fixed-keel equivalent. With a comfort ratio of 11.96, this boat leans toward the sportier end of the spectrum rather than heavy cruising comfort. The capsize screening formula of 2.35 falls within acceptable parameters for coastal sailing. This Beneteau works best for day sailing, weekend coastal cruising, and club racing in protected waters. Its trailerable nature makes it particularly appealing for sailors wanting to explore different sailing areas without marina commitments.

Core Dimensions
LOA (Length Overall) 23.33 ft / 7.11 m
LWL (Waterline Length) 20.25 ft / 6.17 m
Beam 8.17 ft / 2.49 m
Max Draft 5.75 ft / 1.75 m
Min Draft 2.16 ft / 0.66 m
Displacement 2,689.00 lb / 1,220 kg
Ballast 750.00 lb / 340 kg
Sail Area (Reported) 249.00 ft² / 23.13 m²
Design & Construction
Hull Type Swing Keel
Rigging Type Fractional Sloop
Construction FG
Designer Group Finot
Builder Beneteau
First Built 1986
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
20.65
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
27.89
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
144.57
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
11.96
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
2.35
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.03 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
3.96
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 591.14 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 20.62
Rig Dimensions
I (Foretriangle Height) 28.61 ft / 8.72 m
J (Foretriangle Base) 7.87 ft / 2.40 m
P (Mainsail Luff) 26.41 ft / 8.05 m
E (Mainsail Foot) 10.30 ft / 3.14 m
SA Fore 112.58 ft² / 10.46 m²
SA Main 136.01 ft² / 12.64 m²
SA Total (100%) 248.59 ft² / 23.09 m²
Est. Forestay Length 29.67 ft / 9.04 m
How It Compares

vs. Hunter 23, Hunter 235, Precision 23, Santana 2023C, Tonic 23 Jeanneau

This boat Similar boats
Dimensions
LOA
First 235 Sk Beneteau ★
23.3 ft
Hunter 23
23.3 ft
Hunter 235
23.5 ft
Precision 23
23.4 ft
Santana 2023C
23.3 ft
Tonic 23 Jeanneau
23.3 ft
LWL
First 235 Sk Beneteau ★
20.3 ft
Hunter 23
20.3 ft
Hunter 235
20.5 ft
Precision 23
20.0 ft
Santana 2023C
20.6 ft
Tonic 23 Jeanneau
20.3 ft
Beam
First 235 Sk Beneteau ★
8.2 ft
Hunter 23
8.3 ft
Hunter 235
8.3 ft
Precision 23
8.5 ft
Santana 2023C
8.5 ft
Tonic 23 Jeanneau
8.9 ft
Displacement
First 235 Sk Beneteau ★
2 lbs
Hunter 23
3 lbs
Hunter 235
3 lbs
Precision 23
2 lbs
Santana 2023C
2 lbs
Tonic 23 Jeanneau
3 lbs
Ballast
First 235 Sk Beneteau ★
750 lbs
Hunter 23
1 lbs
Hunter 235
1 lbs
Precision 23
850 lbs
Santana 2023C
1 lbs
Tonic 23 Jeanneau
1 lbs
Sail Area
First 235 Sk Beneteau ★
249 sq ft
Hunter 23
238 sq ft
Hunter 235
250 sq ft
Precision 23
248 sq ft
Santana 2023C
222 sq ft
Tonic 23 Jeanneau
248 sq ft
Performance
PHRF Rating (lower = faster)
First 235 Sk Beneteau ★
Hunter 23
243 s/nm
Hunter 235
Precision 23
243 s/nm
Santana 2023C
Tonic 23 Jeanneau
SA / Displacement (higher = more powerful)
First 235 Sk Beneteau ★
20.7
Hunter 23
16.2
Hunter 235
16.4
Precision 23
21.9
Santana 2023C
17.6
Tonic 23 Jeanneau
16.4
Ballast / Disp (higher = stiffer)
First 235 Sk Beneteau ★
27.9 %
Hunter 23
37.5 %
Hunter 235
39.5 %
Precision 23
Santana 2023C
45.1 %
Tonic 23 Jeanneau
35.3 %
Comfort Ratio (higher = more comfortable offshore)
First 235 Sk Beneteau ★
12.0
Hunter 23
Hunter 235
Precision 23
10.4
Santana 2023C
12.0
Tonic 23 Jeanneau
14.8
Capsize Screening (lower = safer)
First 235 Sk Beneteau ★
2.35
Hunter 23
Hunter 235
Precision 23
2.53
Santana 2023C
2.39
Tonic 23 Jeanneau
2.28
Displacement / Length (lower = lighter)
First 235 Sk Beneteau ★
144
Hunter 23
193
Hunter 235
196
Precision 23
Santana 2023C
146
Tonic 23 Jeanneau
198
Hull Speed
First 235 Sk Beneteau ★
6.0 kts
Hunter 23
Hunter 235
Precision 23
6.0 kts
Santana 2023C
6.1 kts
Tonic 23 Jeanneau
6.0 kts
Speed Number (higher = faster)
First 235 Sk Beneteau ★
4.0
Hunter 23
Hunter 235
Precision 23
4.3
Santana 2023C
3.5
Tonic 23 Jeanneau
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