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Dee 25
Designer: Peter Brett  ·  Builder: Alanson & Son (Uk)  ·  First built: 1952
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About the Dee 25

Designed by Peter Brett in the early 1950s, this classic wooden cutter represents the golden age of British yacht design when seaworthiness took precedence over speed. Built by Alanson & Son in the UK, only 25 of these distinctive vessels were constructed, making them a rare sight on today's waters. The Dee 25's traditional long keel configuration and substantial displacement of 11,000 pounds create exceptional stability and tracking ability, while the generous ballast ratio ensures excellent self-righting characteristics. Her cutter rig provides versatile sail handling options, particularly valuable when coastal cruising or making longer passages where changing conditions demand flexibility. With a comfort ratio of 32.82, this yacht prioritizes motion comfort over performance, making her well-suited for serious cruising sailors who value a steady, predictable platform. The robust wooden construction reflects the craftsmanship standards of her era, though prospective owners should carefully evaluate the condition of hull, deck, and structural components given the age of these vessels. Her hull speed of 6.70 knots and capsize screening value of 1.67 indicate conservative but safe passage-making capabilities, making the Dee 25 an appealing choice for traditional sailing enthusiasts seeking a characterful vessel with proven offshore credentials.

Core Dimensions
LOA (Length Overall) 30.83 ft / 9.40 m
LWL (Waterline Length) 25.00 ft / 7.62 m
Beam 9.25 ft / 2.82 m
Max Draft 4.50 ft / 1.37 m
Displacement 11,000.00 lb / 4,990 kg
Ballast 5,000.00 lb / 2,268 kg
Ballast Type Iron
Design & Construction
Hull Type Long Keel
Rigging Type Cutter
Construction Wood
Designer Peter Brett
Builder Alanson & Son (UK)
First Built 1952
Number Built 25
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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
 45.45
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
 314.29
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
 32.82
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
 1.67
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. 6.70 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. 826.28 pounds/inch
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