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Naja 30
Designer: Sylvestre Langevin  ·  Builder: A & T Marine Services/Whisstock's Boatyard  ·  First built: 1976
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About the Naja 30

Designed by Sylvestre Langevin and first launched in 1976, this 30-foot sailboat represents a thoughtful approach to coastal cruising and club racing. Built by A & T Marine Services and Whisstock's Boatyard using aluminum and wood construction, the Naja 30 combines durability with classic aesthetics. The boat's fin keel configuration with transom-hung rudder provides responsive handling while maintaining good directional stability. With a masthead sloop rig carrying 361 square feet of sail area, she offers respectable performance for her size class. The moderate displacement of 7,200 pounds strikes a balance between sailing ability and interior volume, making her suitable for weekend cruising and longer coastal passages. Her comfort ratio of 18.53 suggests a relatively stiff, quick motion that favors performance-oriented sailing, while the capsize screening formula of 2.14 indicates reasonable stability for coastal and near-offshore conditions. The aluminum construction offers excellent longevity and low maintenance compared to fiberglass contemporaries, though it requires specific expertise for repairs. This Canadian design appeals to sailors seeking a well-built coastal cruiser that can handle spirited sailing while providing adequate accommodation for extended trips along protected coastlines and inland waters.

Core Dimensions
LOA (Length Overall) 30.00 ft / 9.14 m
LWL (Waterline Length) 25.40 ft / 7.74 m
Beam 10.33 ft / 3.15 m
Max Draft 5.80 ft / 1.77 m
Displacement 7,200.00 lb / 3,266 kg
Sail Area (Reported) 361.00 ft² / 33.54 m²
Design & Construction
Hull Type Fin w/transom hung rudder
Rigging Type Masthead Sloop
Construction ALU/Wood
Designer Sylvestre Langevin
Builder A & T Marine Services/Whisstock's Boatyard
First Built 1976
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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
 189
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
 15.54
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
 196.15
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
 18.53
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
 2.14
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. 6.75 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
 2.57
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. 937.52 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. 15.54
Rig Dimensions
I (Foretriangle Height) 35.80 ft / 10.91 m
J (Foretriangle Base) 12.00 ft / 3.66 m
P (Mainsail Luff) 30.80 ft / 9.39 m
E (Mainsail Foot) 9.50 ft / 2.90 m
SA Fore 214.80 ft² / 19.96 m²
SA Main 146.30 ft² / 13.59 m²
SA Total (100%) 361.10 ft² / 33.55 m²
Est. Forestay Length 37.76 ft / 11.51 m
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