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Prior 37
Designer: Alan Buchanan  ·  Builder: R. J. Prior & Son Ltd. (Uk)  ·  First built: 1963
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About the Prior 37

Built in 1963 by the respected British yard R. J. Prior & Son Ltd., this rare classic cruiser represents traditional yacht construction at its finest. With only six examples ever built to Alan Buchanan's design, the Prior 37 stands as an exclusive piece of maritime heritage featuring exquisite teak-over-elm planking that exemplifies the craftsmanship of its era. The yacht's long keel configuration and substantial 15,000-pound displacement create exceptional stability and seaworthiness, making it ideally suited for serious offshore cruising and coastal exploration. Her traditional full keel provides excellent directional stability and the ability to take the ground safely, while the masthead sloop rig offers straightforward sail handling and reliable performance in varied conditions. With a comfort ratio of 36.02, this design prioritizes seaworthiness over speed, delivering the steady, secure motion that long-distance cruisers value. The conservative capsize screening formula of 1.64 reflects her inherent stability and suitability for extended ocean passages. Her hull speed of 6.90 knots represents respectable performance for a displacement cruiser of this type. For sailors seeking a rare, traditionally-built yacht with proven offshore capabilities and timeless aesthetic appeal, the Prior 37 offers an increasingly uncommon opportunity to own a piece of British boatbuilding excellence.

Core Dimensions
LOA (Length Overall) 37.00 ft / 11.28 m
LWL (Waterline Length) 26.50 ft / 8.08 m
Beam 10.08 ft / 3.07 m
Max Draft 6.58 ft / 2.01 m
Displacement 15,000.00 lb / 6,804 kg
Ballast Type Lead
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Sloop
Construction Wood (teak over elm)
Designer Alan Buchanan
Builder R. J. Prior & Son Ltd. (UK)
First Built 1963
Number Built 6
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Performance Ratios
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
359.84
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
36.02
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
1.64
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. 6.90 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. 954.45 pounds/inch
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