Design and Construction
Aluminum construction set the Naja 30 apart from the fiberglass norm of her era. It also calls for a different approach to maintenance than a wood or fiberglass boat. The hull has chines, which can provide increased initial stability—a useful trait in a 30-footer intended to feel steady on the wind.
The builder record lists lead ballast and solid-core construction. With a beam of 10.33 feet and a length-to-beam ratio of 2.90, the Naja has a relatively broad plan for a 30-foot design without being extreme. She displaces 7,200 pounds and has a 25.4-foot waterline, making her light enough to be lively yet substantial enough to carry her rig with composure.
The hull and deck are both aluminum. Wetted surface is about 312 square feet, defining the area an owner must consider for antifouling and surveys. The transom-hung rudder is a simple, accessible appendage that suits owner maintenance.
Rig and Sailing Characteristics
The masthead rig carries a reference sail area of 361 square feet. That produces a sail-area-to-displacement ratio of 15.5 using the ISO 8666 reference sail and 18.7 with a 135% genoa. These figures put the Naja toward the responsive end of the cruising spectrum without making her a pure racer.
Her fin keel draws about 5.81 to 6.11 feet depending on load. This keeps her within the draft limits of most marinas while retaining a useful foil for sailing to windward.
A displacement-length ratio of 196 categorizes the boat as a moderate racer. Her theoretical maximum speed as a displacement hull is 6.8 knots. A Motion Comfort Ratio of 18.4 suggests a firmer ride than a heavy cruiser, though not a punishing one, while an immersion rate of about 914 pounds per inch indicates that her trim is sensitive to loading for a boat of this size.
The capsize screening value is 2.14, which indicates that the Naja 30 wouldn’t be accepted to participate in ocean races.
Accommodations and Deck Layout
The Naja 30 measures 30 feet LOA with a beam of 10.33 feet. The available material doesn’t provide interior-layout or tankage data, so any assessment of her accommodations has to remain limited.
Rigging and Refit Information
Period equipment data provides standing- and running-rigging dimensions rather than a history of upgrades. The mainsail, jib, genoa, and spinnaker halyards are each 24.8 meters long and 10 mm in diameter.
The listed sheet dimensions are:
- Jib and genoa sheets: 9.1 meters at 12 mm
- Mainsheet: 22.9 meters at 12 mm
- Spinnaker sheet: 20.1 meters at 12 mm
The Cunningham, kicking strap, and clew outhaul are all 10 mm in diameter, with lengths of 2.9, 5.8, and 5.8 meters respectively. These figures can guide a re-rig, but they say nothing about work carried out by previous owners.
Known Issues and Maintenance
The chined aluminum hull calls for careful scrutiny for corrosion around fittings and at the transom rudder post. However, the available material doesn’t identify a specific failure.
The Verdict
The Naja 30 is a distinctive mid-seventies aluminum cruiser-racer, designed by a French architect and built in America. Her chined hull, moderate-racer rating, and accessible transom-hung rudder make her a straightforward owner’s boat for sailors comfortable with aluminum care.
She is not an offshore racer by the capsize screen, but she remains a quick, roomy 30-footer for coastal and club sailing.
Pros
- Aluminum hull with chines for initial stability
- Masthead rig with a genoa option that raises SA/D to 18.7
- Transom-hung rudder simplifies owner maintenance
- Marina-friendly draft of 5.8 to 6.1 feet
Cons
- Capsize screening value of 2.14 excludes ocean racing
- No authoritative interior or tankage data
- Aluminum construction demands disciplined corrosion vigilance
