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Tahiti Ketch
Designer: John G. Hanna  ·  Builder: From Plans  ·  First built: 1928
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About the Tahiti Ketch

John G. Hanna's Tahiti Ketch stands as one of the most celebrated small cruising designs in sailing history, first introduced in 1928 during the golden age of yacht design. This 30-footer exemplifies the classic cruising philosophy of seaworthiness over speed, earning legendary status among serious bluewater sailors. Built from plans rather than by a single manufacturer, the Tahiti Ketch features Hanna's signature long keel configuration that provides exceptional directional stability and seakindly motion in heavy seas. The masthead ketch rig offers excellent balance and sail handling flexibility, particularly valuable for shorthanded offshore passages. With a displacement of 18,000 pounds and robust construction, this design prioritizes safety and comfort over performance. The boat's generous beam of 10 feet creates surprisingly spacious accommodations for extended cruising, while the moderate draft allows access to shallow anchorages. Its impressive comfort ratio of 46.43 reflects the design's motion characteristics in seaway conditions, making it ideal for serious offshore cruising rather than coastal day sailing. Countless Tahiti Ketches have completed ocean crossings and circumnavigations, cementing the design's reputation as a true pocket cruiser capable of handling the world's most challenging waters with confidence and reliability.

Core Dimensions
LOA (Length Overall) 30.00 ft / 9.14 m
LWL (Waterline Length) 27.00 ft / 8.23 m
Beam 10.00 ft / 3.05 m
Max Draft 4.36 ft / 1.33 m
Displacement 18,000.00 lb / 8,165 kg
Ballast Type Anything
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Ketch
Construction Any
Designer John G. Hanna
Builder from plans
First Built 1928
Owner Reviews

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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
408.26
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
46.43
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
1.53
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. 6.96 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. 964.74 pounds/inch
How It Compares

vs. Acadian 30 Paceship, Cape Cod 30, Waterwitch 30 Mkii

This boat Similar boats
Dimensions
LOA
Tahiti Ketch ★
30.0 ft
Acadian 30 Paceship
30.0 ft
Cape Cod 30
30.0 ft
Waterwitch 30 Mkii
30.0 ft
LWL
Tahiti Ketch ★
27.0 ft
Acadian 30 Paceship
21.8 ft
Cape Cod 30
23.2 ft
Waterwitch 30 Mkii
26.0 ft
Beam
Tahiti Ketch ★
10.0 ft
Acadian 30 Paceship
8.5 ft
Cape Cod 30
9.0 ft
Waterwitch 30 Mkii
8.5 ft
Displacement
Tahiti Ketch ★
18 lbs
Acadian 30 Paceship
7 lbs
Cape Cod 30
7 lbs
Waterwitch 30 Mkii
9 lbs
Ballast
Tahiti Ketch ★
Acadian 30 Paceship
3 lbs
Cape Cod 30
Waterwitch 30 Mkii
2 lbs
Sail Area
Tahiti Ketch ★
Acadian 30 Paceship
387 sq ft
Cape Cod 30
438 sq ft
Waterwitch 30 Mkii
Performance
SA / Displacement (higher = more powerful)
Tahiti Ketch ★
Acadian 30 Paceship
17.0
Cape Cod 30
19.2
Waterwitch 30 Mkii
Comfort Ratio (higher = more comfortable offshore)
Tahiti Ketch ★
46.4
Acadian 30 Paceship
25.8
Cape Cod 30
23.0
Waterwitch 30 Mkii
Capsize Screening (lower = safer)
Tahiti Ketch ★
1.53
Acadian 30 Paceship
1.78
Cape Cod 30
1.88
Waterwitch 30 Mkii
Displacement / Length (lower = lighter)
Tahiti Ketch ★
408
Acadian 30 Paceship
Cape Cod 30
251
Waterwitch 30 Mkii
241
Hull Speed
Tahiti Ketch ★
7.0 kts
Acadian 30 Paceship
6.3 kts
Cape Cod 30
6.5 kts
Waterwitch 30 Mkii
Speed Number (higher = faster)
Tahiti Ketch ★
Acadian 30 Paceship
1.7
Cape Cod 30
2.4
Waterwitch 30 Mkii
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