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Crowther 42
Designer: Lock Crowther  ·  Builder: Cat Factory (Usa)  ·  First built: 2000
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About the Crowther 42

Designed by the renowned Australian multihull pioneer Lock Crowther, this 42-foot catamaran represents decades of accumulated knowledge in performance cruising catamaran design. Lock Crowther's designs became legendary throughout the Pacific for their seaworthiness and ability to handle serious offshore passages while maintaining excellent sailing performance. Built for blue water cruising, the Crowther 42 features the distinctive design philosophy that made Lock's catamarans famous among serious ocean voyagers. These boats typically showcase fine entry hulls, moderate beam for their era, and robust construction methods that prioritized reliability over weight savings. The design emphasizes practical offshore capability rather than maximum speed, making it an excellent choice for extended cruising and liveaboard situations. Crowther catamarans earned their reputation through real-world performance across the Pacific Ocean, where many examples logged tens of thousands of ocean miles. The 42-footer continues this tradition with accommodations suited for long-term cruising and systems designed for self-sufficiency. While not the fastest multihull design by modern standards, the Crowther 42 offers the proven seaworthiness and practical layout that made Lock Crowther's designs the choice of serious ocean voyagers throughout the 1970s and 1980s.

Core Dimensions
LOA (Length Overall) 41.99 ft / 12.80 m
Beam 23.00 ft / 7.01 m
Max Draft 3.02 ft / 0.92 m
Displacement 11,402.00 lb / 5,172 kg
Design & Construction
Hull Type Catamaran Twin Dbrd.
Rigging Type Fractional Sloop
Construction FG Composite
Designer Lock Crowther
Builder Cat Factory (USA)
First Built 2000
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Performance Ratios
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
111.95
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
7.14
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
4.09
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. 8.01 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. 17.59 pounds/inch
Rig Dimensions
I (Foretriangle Height) 37.14
P (Mainsail Luff) 1,172.00 ft² / 108.88 m²
E (Mainsail Foot) Yanmar
Engine & Accommodations
Fuel Capacity 79 gals / 299 L
Water Capacity 106 gals / 401 L
How It Compares

vs. Morris 42, Privilege 42, Rustler 42

This boat Similar boats
Dimensions
LOA
Crowther 42 ★
42.0 ft
Morris 42
42.0 ft
Privilege 42
42.0 ft
Rustler 42
42.0 ft
LWL
Crowther 42 ★
Morris 42
33.5 ft
Privilege 42
38.2 ft
Rustler 42
33.5 ft
Beam
Crowther 42 ★
23.0 ft
Morris 42
12.5 ft
Privilege 42
23.0 ft
Rustler 42
13.3 ft
Displacement
Crowther 42 ★
11 lbs
Morris 42
19 lbs
Privilege 42
16 lbs
Rustler 42
26 lbs
Ballast
Crowther 42 ★
Morris 42
8 lbs
Privilege 42
Rustler 42
10 lbs
Sail Area
Crowther 42 ★
Morris 42
758 sq ft
Privilege 42
Rustler 42
950 sq ft
Performance
SA / Displacement (higher = more powerful)
Crowther 42 ★
Morris 42
16.9
Privilege 42
Rustler 42
17.4
Comfort Ratio (higher = more comfortable offshore)
Crowther 42 ★
7.1
Morris 42
28.7
Privilege 42
9.9
Rustler 42
35.4
Capsize Screening (lower = safer)
Crowther 42 ★
4.09
Morris 42
1.87
Privilege 42
3.62
Rustler 42
1.80
Displacement / Length (lower = lighter)
Crowther 42 ★
111
Morris 42
230
Privilege 42
132
Rustler 42
Hull Speed
Crowther 42 ★
8.0 kts
Morris 42
7.8 kts
Privilege 42
8.3 kts
Rustler 42
7.8 kts
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