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Nauset 25
Designer: Robert Finch  ·  Builder: Nauset Marine (Usa)  ·  First built: 1973
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About the Nauset 25

Designed by Robert Finch and first launched in 1973, this compact cruiser represents classic New England boat building from Nauset Marine. With its masthead sloop rig and combination keel/centerboard configuration, the Nauset 25 offers versatility for both shallow water exploration and deeper water sailing. The boat's moderate displacement of 4,000 pounds and substantial ballast ratio provide good stability for coastal cruising, while the retractable centerboard allows access to thin water anchorages and beaches. At 25.7 feet overall with an 8-foot beam, she offers reasonable interior space for a boat this size, making her suitable for weekend cruising and daysailing. Her comfort ratio of 16.67 indicates a relatively stiff, quick motion that favors daysailing over extended offshore passages, while the capsize screening value of 2.02 suggests she's best suited for coastal waters rather than blue water voyaging. The moderate sail area of 271 square feet provides manageable sailing for small crews. Built during the height of the fiberglass revolution, the Nauset 25 reflects the era's emphasis on practical, affordable cruising boats. Her hull speed of 6.31 knots and SA/displacement ratio of 17.25 indicate moderate performance characteristics typical of comfortable coastal cruisers from this period.

Core Dimensions
LOA (Length Overall) 25.70 ft / 7.83 m
LWL (Waterline Length) 22.17 ft / 6.76 m
Beam 8.00 ft / 2.44 m
Max Draft 5.33 ft / 1.62 m
Min Draft 1.67 ft / 0.51 m
Displacement 4,000.00 lb / 1,814 kg
Ballast 1,100.00 lb / 499 kg
Sail Area (Reported) 271.00 ft² / 25.18 m²
Design & Construction
Hull Type Keel/Cbrd.
Rigging Type Masthead Sloop
Construction FG
Designer Robert Finch
Builder Nauset Marine (USA)
First Built 1973
Associations Parkerdawson.com
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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
 17.25
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
 27.5
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
 163.88
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
 16.67
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
 2.02
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. 6.31 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 3.21
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. 633.73 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 17.27
Rig Dimensions
I (Foretriangle Height) 29.30 ft / 8.93 m
J (Foretriangle Base) 10.00 ft / 3.05 m
P (Mainsail Luff) 24.00 ft / 7.32 m
E (Mainsail Foot) 10.40 ft / 3.17 m
SA Fore 146.50 ft² / 13.61 m²
SA Main 124.80 ft² / 11.59 m²
SA Total (100%) 271.30 ft² / 25.20 m²
Est. Forestay Length 30.96 ft / 9.44 m
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