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Tanton 45
Designer: Yves-Marie Tanton  ·  Builder: Ta Chiao Ltd.  ·  First built: 1983
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About the Tanton 45

Designed by the respected naval architect Yves-Marie Tanton, the Tanton 45 is a capable bluewater cruising sailboat built with serious offshore passagemaking in mind. Tanton earned a reputation for producing well-balanced, seaworthy designs, and the 45 reflects that philosophy with a hull shape and overall configuration suited to extended ocean voyaging rather than casual coastal daysailing. While detailed specifications for this model are limited in wider databases, the boat carries the hallmarks of Tanton's design sensibility — a focus on stability, comfort at sea, and dependable performance across a range of conditions. Sailors drawn to this vessel are typically those prioritizing safety and long-range capability over outright speed or racing credentials. For anyone researching the Tanton 45 as a potential purchase, it is worth connecting with owners directly through cruising forums and bluewater sailing communities, where firsthand accounts of her sea behavior and liveaboard qualities can provide valuable insight. As with many boutique designs from skilled individual architects, the Tanton 45 tends to attract knowledgeable buyers who appreciate thoughtful engineering over mass-market familiarity.

Core Dimensions
LOA (Length Overall) 44.83 ft / 13.66 m
LWL (Waterline Length) 39.42 ft / 12.02 m
Beam 13.67 ft / 4.17 m
Max Draft 4.92 ft / 1.50 m
Displacement 25,920.00 lb / 11,757 kg
Ballast 9,270.00 lb / 4,205 kg
Sail Area (Reported) 1,215.00 ft² / 112.88 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Cat Ketch (unstayed)
Construction FG
Designer Yves-Marie Tanton
Builder Ta Chiao Ltd.
First Built 1983
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
22.28
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
29.99
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
1.85
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. 8.41
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. 1.0
Rig Dimensions
P (Mainsail Luff) 53.5
E (Mainsail Foot) 16.0
SA Main 428.0
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