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Jeanneau 342
Designer: Groupe Finot  ·  First built: 1992
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About the Jeanneau 342

Built during Jeanneau's productive era of the 1980s, this mid-sized cruiser represents the French builder's commitment to creating affordable yet capable sailing yachts for the growing recreational market. The 342 falls into that sweet spot of being large enough for comfortable coastal cruising while remaining manageable for couples or small crews. Like many Jeanneau designs of this period, the 342 features practical accommodations that maximize interior space through clever layout design. The boat's moderate proportions suggest it was intended primarily for coastal and near-shore cruising, offering a good balance between sailing performance and onboard comfort. French builders of this era were particularly skilled at creating boats that felt larger below decks than their length might suggest. The 342 would have appealed to sailors seeking an entry point into larger cruising boats without the complexity and expense of truly offshore-capable vessels. While not designed for ocean passages, these boats have proven themselves reliable platforms for weekend cruising, extended coastal voyages, and serving as comfortable floating homes in protected waters. The Jeanneau reputation for solid construction and practical design carries through in this model.

Core Dimensions
LOA (Length Overall) 34.45 ft / 10.50 m
LWL (Waterline Length) 29.53 ft / 9.00 m
Beam 11.81 ft / 3.60 m
Max Draft 5.91 ft / 1.80 m
Displacement 12,566 lb / 5,700 kg
Ballast 4,409 lb / 2,000 kg
Sail Area (Reported) 570 ft² / 52.95 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Groupe Finot
First Built 1992
Last Built 1997
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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
16.84
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
35.09
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
217.85
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
23.2
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
2.04
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. 7.28 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. 7.47 pounds/inch
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