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Capo 30
Designer: Carl Schumacher  ·  Builder: Westerly Marine (Usa)  ·  First built: 1984
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About the Capo 30

Designed by renowned naval architect Carl Schumacher and built by Westerly Marine USA, this rare 30-footer represents a brief but notable chapter in American sailboat manufacturing. With only eight hulls produced between 1984 and 1985, the Capo 30 stands as an uncommon find in today's used boat market. Schumacher's design philosophy shines through in the boat's performance-oriented specifications. The fin keel with spade rudder configuration delivers responsive handling, while the masthead sloop rig provides versatile sail options for various conditions. With a sail area to displacement ratio of 20.49, this boat demonstrates spirited performance characteristics that will appeal to sailors seeking more excitement than typical cruising designs offer. The fiberglass construction and moderate displacement of 7,200 pounds, supported by 3,000 pounds of ballast, creates a stable platform suitable for coastal sailing and club racing. The low comfort ratio of 18.72 and capsize screening value of 2.14 indicate this design prioritizes performance over accommodations, making it ideal for day sailing, weekend trips, and competitive racing rather than extended cruising. The efficient 25-foot waterline length allows the boat to achieve its theoretical hull speed of 6.70 knots with relative ease.

Core Dimensions
LOA (Length Overall) 30.00 ft / 9.14 m
LWL (Waterline Length) 25.00 ft / 7.62 m
Beam 10.33 ft / 3.15 m
Max Draft 5.43 ft / 1.66 m
Displacement 7,200.00 lb / 3,266 kg
Ballast 3,000.00 lb / 1,361 kg
Ballast Type Lead
Sail Area (Reported) 476.00 ft² / 44.22 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Carl Schumacher
Builder Westerly Marine (USA)
First Built 1984
Last Built 1985
Number Built 8
Related Sailboats Olson 30 · J/30 · Cs 30 · Capri 30 Catalina · Mirage 30 Sx
Owner Reviews

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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
 114
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
 20.49
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
 41.67
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
 205.71
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
 18.72
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
 2.14
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. 6.70 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
 3.02
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. 922.76 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. 20.48
Rig Dimensions
I (Foretriangle Height) 42.00 ft / 12.80 m
J (Foretriangle Base) 12.80 ft / 3.90 m
P (Mainsail Luff) 36.00 ft / 10.97 m
E (Mainsail Foot) 11.50 ft / 3.51 m
SA Fore 268.80 ft² / 24.97 m²
SA Main 207.00 ft² / 19.23 m²
SA Total (100%) 475.80 ft² / 44.20 m²
Est. Forestay Length 43.91 ft / 13.38 m
Engine & Accommodations
Engine Make Yanmar
Engine Model 2GM
Engine Type Diesel
Horsepower 15
How It Compares

vs. Capri 30 Catalina, Cs 30, J/30, Mirage 30 Sx, Olson 30

This boat Similar boats
Dimensions
LOA
Capo 30 ★
30.0 ft
Capri 30 Catalina
30.0 ft
Cs 30
30.0 ft
J/30
30.0 ft
Mirage 30 Sx
30.0 ft
Olson 30
30.0 ft
LWL
Capo 30 ★
25.0 ft
Capri 30 Catalina
25.0 ft
Cs 30
25.4 ft
J/30
25.0 ft
Mirage 30 Sx
24.1 ft
Olson 30
27.5 ft
Beam
Capo 30 ★
10.3 ft
Capri 30 Catalina
10.8 ft
Cs 30
10.3 ft
J/30
10.8 ft
Mirage 30 Sx
10.5 ft
Olson 30
9.3 ft
Displacement
Capo 30 ★
7 lbs
Capri 30 Catalina
8 lbs
Cs 30
8 lbs
J/30
6 lbs
Mirage 30 Sx
5 lbs
Olson 30
3 lbs
Ballast
Capo 30 ★
3 lbs
Capri 30 Catalina
3 lbs
Cs 30
3 lbs
J/30
2 lbs
Mirage 30 Sx
—
Olson 30
1 lbs
Sail Area
Capo 30 ★
476 sq ft
Capri 30 Catalina
387 sq ft
Cs 30
462 sq ft
J/30
436 sq ft
Mirage 30 Sx
474 sq ft
Olson 30
380 sq ft
Performance
PHRF Rating (lower = faster)
Capo 30 ★
114 s/nm
Capri 30 Catalina
111 s/nm
Cs 30
150 s/nm
J/30
144 s/nm
Mirage 30 Sx
120 s/nm
Olson 30
100 s/nm
SA / Displacement (higher = more powerful)
Capo 30 ★
20.5
Capri 30 Catalina
15.5
Cs 30
18.5
J/30
20.8
Mirage 30 Sx
23.3
Olson 30
26.0
Ballast / Disp (higher = stiffer)
Capo 30 ★
41.7 %
Capri 30 Catalina
37.5 %
Cs 30
—
J/30
39.3 %
Mirage 30 Sx
—
Olson 30
—
Comfort Ratio (higher = more comfortable offshore)
Capo 30 ★
18.7
Capri 30 Catalina
—
Cs 30
20.8
J/30
23.6
Mirage 30 Sx
15.4
Olson 30
10.1
Capsize Screening (lower = safer)
Capo 30 ★
2.14
Capri 30 Catalina
—
Cs 30
2.05
J/30
1.73
Mirage 30 Sx
2.33
Olson 30
2.44
Displacement / Length (lower = lighter)
Capo 30 ★
205
Capri 30 Catalina
228
Cs 30
—
J/30
109
Mirage 30 Sx
187
Olson 30
—
Hull Speed
Capo 30 ★
6.7 kts
Capri 30 Catalina
—
Cs 30
6.8 kts
J/30
7.6 kts
Mirage 30 Sx
6.6 kts
Olson 30
7.0 kts
Speed Number (higher = faster)
Capo 30 ★
3.0
Capri 30 Catalina
—
Cs 30
2.7
J/30
—
Mirage 30 Sx
3.6
Olson 30
6.2
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