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Family Cat 23
Designer: William Garden  ·  Builder: Bill Boyd Boats/Halman Man.(Can)  ·  First built: 1978
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About the Family Cat 23

Designed by renowned naval architect William Garden and built by Bill Boyd Boats and Halman Manufacturing in Canada, this compact cruiser represents a charming blend of traditional aesthetics and practical sailing capabilities. With its distinctive gaff-rigged cat boat configuration, the Family Cat 23 offers a unique sailing experience that harks back to classic American coastal designs. The boat's substantial 6,000-pound displacement and generous 10-foot beam provide impressive stability and interior volume for a 23-footer, while the moderate draft of 6 feet allows access to shallow anchorages and gunkholes. The keel/centerboard configuration enhances this versatility, making it well-suited for coastal cruising and exploring protected waters. Garden's design philosophy shines through in the boat's comfortable proportions, evidenced by an excellent comfort ratio of 20.15, suggesting good motion at sea and livable accommodations below. The 414 square feet of sail area provides adequate power for leisurely cruising, while the gaff rig adds character and traditional appeal that modern boats often lack. With only twelve hulls built starting in 1978, the Family Cat 23 remains a rare find that appeals to sailors seeking a distinctive pocket cruiser with classic lines and proven seaworthiness for weekend adventures and short-term coastal cruising.

Core Dimensions
LOA (Length Overall) 23.00 ft / 7.01 m
LWL (Waterline Length) 20.75 ft / 6.32 m
Beam 10.00 ft / 3.05 m
Max Draft 6.00 ft / 1.83 m
Min Draft 2.25 ft / 0.69 m
Displacement 6,000.00 lb / 2,722 kg
Ballast 1,400.00 lb / 635 kg
Sail Area (Reported) 414.00 ft² / 38.46 m²
Design & Construction
Hull Type Keel/Cbrd.
Rigging Type Gaff head Cat
Construction FG
Designer William Garden
Builder Bill Boyd Boats/Halman Man.(CAN)
First Built 1978
Number Built 12
Owner Reviews

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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
20.12
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
23.33
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
299.81
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
20.15
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
2.2
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. 6.10 kn
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. 741.42 pounds/inch
Engine & Accommodations
Engine Make Farymann
Engine Type Diesel
Fuel Capacity 14 gals / 53 L
Water Capacity 20 gals / 76 L
How It Compares

vs. Com-Pac 23/Iv, Montgomery 23, Paceship 23 Cc, Pearson 23, San Juan 23

This boat Similar boats
Dimensions
LOA
Family Cat 23 ★
23.0 ft
Com-Pac 23/Iv
23.0 ft
Montgomery 23
23.0 ft
Paceship 23 Cc
23.0 ft
Pearson 23
23.0 ft
San Juan 23
23.0 ft
LWL
Family Cat 23 ★
20.8 ft
Com-Pac 23/Iv
20.0 ft
Montgomery 23
21.8 ft
Paceship 23 Cc
19.0 ft
Pearson 23
20.0 ft
San Juan 23
20.3 ft
Beam
Family Cat 23 ★
10.0 ft
Com-Pac 23/Iv
8.0 ft
Montgomery 23
8.0 ft
Paceship 23 Cc
8.0 ft
Pearson 23
8.0 ft
San Juan 23
8.0 ft
Displacement
Family Cat 23 ★
6 lbs
Com-Pac 23/Iv
3 lbs
Montgomery 23
3 lbs
Paceship 23 Cc
2 lbs
Pearson 23
3 lbs
San Juan 23
2 lbs
Ballast
Family Cat 23 ★
1 lbs
Com-Pac 23/Iv
1 lbs
Montgomery 23
1 lbs
Paceship 23 Cc
900 lbs
Pearson 23
1 lbs
San Juan 23
960 lbs
Sail Area
Family Cat 23 ★
414 sq ft
Com-Pac 23/Iv
195 sq ft
Montgomery 23
249 sq ft
Paceship 23 Cc
Pearson 23
238 sq ft
San Juan 23
Performance
PHRF Rating (lower = faster)
Family Cat 23 ★
Com-Pac 23/Iv
Montgomery 23
234 s/nm
Paceship 23 Cc
Pearson 23
240 s/nm
San Juan 23
236 s/nm
SA / Displacement (higher = more powerful)
Family Cat 23 ★
20.1
Com-Pac 23/Iv
14.7
Montgomery 23
17.0
Paceship 23 Cc
Pearson 23
16.6
San Juan 23
Ballast / Disp (higher = stiffer)
Family Cat 23 ★
23.3 %
Com-Pac 23/Iv
35.5 %
Montgomery 23
42.5 %
Paceship 23 Cc
39.1 %
Pearson 23
37.1 %
San Juan 23
35.6 %
Comfort Ratio (higher = more comfortable offshore)
Family Cat 23 ★
20.2
Com-Pac 23/Iv
14.3
Montgomery 23
15.7
Paceship 23 Cc
Pearson 23
16.3
San Juan 23
Capsize Screening (lower = safer)
Family Cat 23 ★
2.20
Com-Pac 23/Iv
2.20
Montgomery 23
2.09
Paceship 23 Cc
Pearson 23
2.11
San Juan 23
Displacement / Length (lower = lighter)
Family Cat 23 ★
299
Com-Pac 23/Iv
172
Montgomery 23
154
Paceship 23 Cc
149
Pearson 23
195
San Juan 23
143
Hull Speed
Family Cat 23 ★
6.1 kts
Com-Pac 23/Iv
6.0 kts
Montgomery 23
6.3 kts
Paceship 23 Cc
Pearson 23
6.0 kts
San Juan 23
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