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Aquarius 23
Designer: Peter Barrett / Stan Miller  ·  Builder: Coastal Recreation Inc. (Usa)  ·  First built: 1969
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About the Aquarius 23

Built during the 1970s sailing boom, this compact cruiser from Coastal Recreation represents classic American small boat design philosophy. The Peter Barrett and Stan Miller collaboration resulted in a versatile 23-footer that maximized interior space while maintaining respectable sailing characteristics. The swing keel configuration stands as the boat's defining feature, allowing access to shallow anchorages and easy trailering while providing 4.58 feet of draft when deployed for upwind performance. This versatility made the design particularly appealing to coastal cruisers seeking gunkholing capabilities without sacrificing sailing ability. The substantial 815-pound ballast ratio ensures adequate stability for coastal and protected water sailing. Construction follows period standards with fiberglass hull and balsa-cored deck, providing good insulation and stiffness-to-weight ratio. The fractional sloop rig delivers manageable sail handling for small crews, while the 218 square feet of canvas provides adequate power for the 2,280-pound displacement. With a comfort ratio of 10.35, this design leans toward the sportier side of small cruisers, making it well-suited for day sailing and weekend coastal cruising rather than extended offshore passages. The reasonable sail area to displacement ratio of 20.18 suggests lively performance in moderate conditions, appealing to sailors who want responsive handling without overwhelming power.

Core Dimensions
LOA (Length Overall) 22.67 ft / 6.91 m
LWL (Waterline Length) 21.17 ft / 6.45 m
Beam 7.92 ft / 2.41 m
Max Draft 4.58 ft / 1.40 m
Min Draft 1.08 ft / 0.33 m
Displacement 2,280.00 lb / 1,034 kg
Ballast 815.00 lb / 370 kg
Ballast Type Lead
Sail Area (Reported) 218.00 ft² / 20.25 m²
Design & Construction
Hull Type Swing Keel
Rigging Type Fractional Sloop
Construction FG w/balsa cored deck
Designer Peter Barrett / Stan Miller
Builder Coastal Recreation Inc. (USA)
First Built 1969
Last Built 1976
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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
276
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
20.18
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
35.75
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
107.28
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
10.35
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
2.41
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. 6.17 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
4.59
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. 599.09 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. 20.16
Rig Dimensions
I (Foretriangle Height) 22.00 ft / 6.71 m
J (Foretriangle Base) 8.70 ft / 2.65 m
P (Mainsail Luff) 23.70 ft / 7.22 m
E (Mainsail Foot) 10.30 ft / 3.14 m
SA Fore 95.70 ft² / 8.89 m²
SA Main 122.06 ft² / 11.34 m²
SA Total (100%) 217.76 ft² / 20.23 m²
Est. Forestay Length 23.66 ft / 7.21 m
How It Compares

vs. Aquarius 23 2, Coronado 23, Seafarer 23

This boat Similar boats
Dimensions
LOA
Aquarius 23 ★
22.7 ft
Aquarius 23 2
22.7 ft
Coronado 23
22.6 ft
Seafarer 23
22.7 ft
LWL
Aquarius 23 ★
21.2 ft
Aquarius 23 2
21.2 ft
Coronado 23
20.1 ft
Seafarer 23
20.0 ft
Beam
Aquarius 23 ★
7.9 ft
Aquarius 23 2
7.9 ft
Coronado 23
7.8 ft
Seafarer 23
7.6 ft
Displacement
Aquarius 23 ★
2 lbs
Aquarius 23 2
2 lbs
Coronado 23
2 lbs
Seafarer 23
2 lbs
Ballast
Aquarius 23 ★
815 lbs
Aquarius 23 2
Coronado 23
1 lbs
Seafarer 23
1 lbs
Sail Area
Aquarius 23 ★
218 sq ft
Aquarius 23 2
218 sq ft
Coronado 23
237 sq ft
Seafarer 23
219 sq ft
Performance
PHRF Rating (lower = faster)
Aquarius 23 ★
276 s/nm
Aquarius 23 2
Coronado 23
270 s/nm
Seafarer 23
260 s/nm
SA / Displacement (higher = more powerful)
Aquarius 23 ★
20.2
Aquarius 23 2
18.6
Coronado 23
21.8
Seafarer 23
17.9
Ballast / Disp (higher = stiffer)
Aquarius 23 ★
35.8 %
Aquarius 23 2
Coronado 23
47.8 %
Seafarer 23
38.6 %
Comfort Ratio (higher = more comfortable offshore)
Aquarius 23 ★
10.4
Aquarius 23 2
11.7
Coronado 23
11.2
Seafarer 23
13.8
Capsize Screening (lower = safer)
Aquarius 23 ★
2.41
Aquarius 23 2
2.31
Coronado 23
2.35
Seafarer 23
2.17
Displacement / Length (lower = lighter)
Aquarius 23 ★
107
Aquarius 23 2
121
Coronado 23
126
Seafarer 23
153
Hull Speed
Aquarius 23 ★
6.2 kts
Aquarius 23 2
6.2 kts
Coronado 23
6.0 kts
Seafarer 23
6.0 kts
Speed Number (higher = faster)
Aquarius 23 ★
4.6
Aquarius 23 2
4.1
Coronado 23
4.5
Seafarer 23
3.3
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