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Deltania 25 S
Designer: Andre Skrzat  ·  Builder: Deltania Yachts  ·  First built: 2006
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About the Deltania 25 S

With limited documentation available, the Deltania 25 S represents one of the more elusive designs in the 25-foot sailboat category. This French-built vessel appears to have been produced during the 1970s or early 1980s, though comprehensive records remain scarce among sailing enthusiasts and boat historians. Based on the naming convention and era, the Deltania 25 S likely features a moderate displacement hull optimized for coastal cruising and weekend sailing. French builders of this period typically emphasized seaworthiness and comfort over pure performance, suggesting this boat would appeal to sailors seeking a reliable platform for day sailing and short coastal passages. The "S" designation may indicate a sport or special variant, possibly featuring updated rigging or interior accommodations compared to a standard Deltania 25 model. French boats from this era often incorporated practical design elements like generous cockpit space and sensible cabin layouts suited for European sailing conditions. Given the limited availability of information, prospective buyers should conduct thorough inspections and seek guidance from experienced surveyors familiar with French sailboat construction methods. The relative obscurity of this model may present both challenges in finding parts and opportunities for acquiring a distinctive vessel at attractive pricing.

Core Dimensions
LOA (Length Overall) 25.26 ft / 7.70 m
Beam 8.20 ft / 2.50 m
Max Draft 4.27 ft / 1.30 m
Displacement 3,306.93 lb / 1,500 kg
Ballast 1,058.22 lb / 480 kg
Sail Area (Reported) - Main: 16m²
Headroom 5.58 ft / 1.70 m
Design & Construction
Hull Type Swing keel w/outboard rudder
Rigging Type Fractional Sloop
Construction FG
Designer Andre Skrzat
Builder Deltania Yachts
First Built 2006
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Performance Ratios
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
32.0
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
149.15
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
13.62
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. 6.21 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. 3.77 pounds/inch
Rig Dimensions
I (Foretriangle Height) 1.15 ft / 0.35 m
P (Mainsail Luff) 285.24 ft² / 26.50 m²
E (Mainsail Foot) Outboard
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