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Medusa 25
Designer: Marice Griffiths  ·  Builder: F1 Glass Dev. Ltd.  ·  First built: 1960
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About the Medusa 25

With limited documentation available, the Medusa 25 represents one of the more elusive designs in the 25-foot sailboat category. This relative obscurity often indicates either a small production run or a boat that served a specific niche market, making surviving examples potentially interesting finds for sailors seeking something different from the mainstream offerings. Based on the naming convention and size category, this sailboat likely emerged during the golden era of small boat development when manufacturers were experimenting with various hull forms and rigging configurations. The 25-foot length suggests a boat designed for coastal sailing and weekend cruising, offering a balance between manageable size and reasonable accommodation space. Given the limited specifications available, potential buyers should approach any Medusa 25 with thorough survey work and careful attention to the specific construction methods and materials used. The scarcity of information also means parts availability and support network could be limited, making these boats better suited for sailors comfortable with improvisation and custom solutions. For those drawn to unique designs with character, the Medusa 25 might offer an opportunity to own something distinctive, though buyers should expect to become intimately familiar with their boat's individual quirks and requirements.

Core Dimensions
LOA (Length Overall) 24.50 ft / 7.47 m
LWL (Waterline Length) 18.75 ft / 5.72 m
Beam 8.00 ft / 2.44 m
Max Draft 2.50 ft / 0.76 m
Displacement 4,704.00 lb / 2,134 kg
Sail Area (Reported) 256.00 ft² / 23.78 m²
Design & Construction
Hull Type Twin Keel
Rigging Type Masthead Sloop
Construction Wood/FG
Designer Marice Griffiths
Builder F1 Glass Dev. Ltd.
First Built 1960
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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
14.63
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
22.24
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
1.91
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. 5.8
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. 535.97
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