Design and Construction
Aztec Yachts laid up the Nautilus 11 in solid fiberglass for both hull and deck, with lead ballast accounting for roughly 41 percent of the 15,000-pound displacement — a 6,100-pound bite that gives the boat a ballast-displacement ratio of 40.67. The length-to-beam ratio sits at 3.14 against an 11.5-foot beam, and the displacement-length ratio of 305 marks her firmly as a heavy coastal and offshore cruiser rather than a light racer. Her capsize screening value of 1.87 and motion comfort ratio of 29.44 place her among the more forgiving designs of her size, a function of that low, wet 344-square-foot wetted surface and the immersion rate of about 1,123 pounds per inch, which means she settles predictably under load capsize screening value for Nautilus 11m is 1.87.
Rig and Handling
The cutter rig carries 605 square feet of sail and a sail-area-to-displacement ratio of 15.91, a modest figure that confirms the design's bias toward control in a blow over outright acceleration. Period specifications list sheet dimensions that tell you something about the loads the original rig was sized for: jib and genoa sheets run 36.2 feet at 14 mm diameter, the mainsheet stretches 90.4 feet at the same 14 mm, and the spinnaker sheet is 79.5 feet of 14 mm line guiding dimension for the mainsheet. The fin keel draws between 4.99 and 5.29 feet depending on load, shallow enough to make most marinas reachable, while the theoretical hull speed of 7.1 knots sets the upper bound a displacement hull of this waterline will comfortably reach.
Known Issues
The Nautilus 11m exhibits no structural defects, osmotic hull problems, rigging failures, or systemic construction faults in its service history. The small production count limits field exposure, and the absence of reported issues should be read as silence rather than certification.
Refits and Ownership
With only five hulls built between 1981 and 1990, the Nautilus 11 exists in a context where every surviving example is effectively a one-off in the market. Solid-glass construction and a conservative cutter rig mean that any refit history will be particular to the owner, and spares for the rig follow the standard 14 mm sheet specification rather than a proprietary size.
The Verdict
The Nautilus 11m is a rare, heavily built Dutch-designed cutter whose numbers describe a stable, load-carrying cruiser with predictable floating characteristics and a rig sized for durability. She is not a performance boat, and the scarcity of the design means buyers must rely on per-hull survey rather than a community knowledge base.
Pros
- Heavy-displacement solid-fiberglass construction with 41 percent lead ballast
- Forgiving motion and capsize screening figures for offshore use
- Cutter rig with conservative, standard-sized sheet specifications
Cons
- Very low production count limits shared ownership experience
- Modest sail-area-to-displacement ratio restricts light-air performance
- No interior or systems specifications published for buyer comparison
