Hinterhoeller Nonsuch 354 Information, Review, Specs

Sailing Performance & Handling

The 354 retains the defining characteristic of the Nonsuch line: an unstayed cat rig with a wishbone boom, allowing for "one-sheet sailing." However, the 354 differs from earlier models by featuring a standard carbon fiber mast and wishbone boom, which significantly reduces weight aloft. This lower center of gravity improves the vessel's righting moment and reduces pitching in a head sea. With a high sail area to displacement ratio (SA/Disp) near 21, the boat is surprisingly spirited in light air.

Handling is famously straightforward, as the absence of a forestay and shrouds eliminates the need for winching a jib through every tack. Despite its bluff, traditional catboat bow, the 354 points remarkably well—a result of its modern fin keel and spade rudder. A common praise found in editorial retrospectives, such as those by Canadian Boating, is the boat's lack of "catboat disease"—the heavy weather helm typically associated with wide-beamed, single-sail vessels. Instead, the 354 is noted for its light helm and "stiff" sailing characteristics, even when the wind pipes up.

Interior Comfort & Variations

The most significant departure from its sibling, the Nonsuch 33, is found below decks. The 354 was designed to provide the privacy and amenities of a 40-foot yacht within a 35-foot hull. While the 33 featured an open-plan "Ultra" layout, the 354 offers a dedicated forward stateroom with a permanent double berth and a door for privacy. The main salon is expansive, benefiting from the boat's generous 12' 6" beam, and features a U-shaped galley to port and a large dinette.

A key upgrade in the 354 is the inclusion of a separate shower stall in the head compartment, a luxury rarely found on the older 33 or 30 models. Interior joinery is typically finished in cherry or teak, maintaining the high Hinterhoeller standard. On deck, the 354 was built with significantly less exterior wood than earlier models, replacing teak toe rails with aluminum or stainless steel to minimize maintenance.

Popular Mentions & Media

Due to its extreme rarity, the Nonsuch 354 rarely appears in mainstream sailing media, though it is frequently discussed in technical owner circles as the "holy grail" of the Nonsuch line. The model was highlighted in historical documentation by the International Nonsuch Association as a pinnacle of the brand's 25-year history. Its design legacy is often tied to the "Round Denmark" regatta records set by other Nonsuch models, which helped prove the offshore capability of Mark Ellis's unstayed rig designs.

Known Issues & Buyer’s Checklist

Prospective buyers should focus on technical areas unique to the unstayed carbon fiber rig and the Hinterhoeller construction methods of the late 1990s:

• Carbon Fiber Spar Inspection: While carbon fiber does not corrode like aluminum, it can suffer from UV degradation or stress cracking if the clear coat has been neglected. Inspect the mast partners and the points where hardware is through-bolted for any signs of delamination.
• Mast Step Drainage: A known issue across the Nonsuch range is the accumulation of water at the base of the mast. Ensure the weep holes are clear and that the mast step and surrounding grid show no signs of compression or moisture-related rot.
• Balsa Core Integrity: Like many Hinterhoeller builds, the 354 uses balsa coring in the deck and hull. Particular attention should be paid to the areas around the integrated swim platform and the stanchion bases, where hardware penetrations may have allowed water ingress.
• Wishbone Hardware: The wishbone boom puts unique stresses on its forward attachment (the "choker" system) and the aft clew blocks. These components should be checked for wear and proper lubrication.

Community & Resources

The International Nonsuch Association is the definitive resource for this model. The association maintains a technical library that includes the original Hinterhoeller brochures and detailed maintenance wikis specifically for the 354 and its sibling, the 33.

The Verdict

The Nonsuch 354 is arguably the most sophisticated cat-ketch ever produced for the production market, offering the volume of a much larger yacht with the handling simplicity of a dinghy.

Pros:

• Effortless single-handed operation with no headsails to manage.
• Exceptional interior volume with a true two-cabin, separate-shower layout.
• High-tech carbon fiber rig provides better stability and performance than aluminum predecessors.
• Extremely high resale value and strong owner community support.

Cons:

• Extreme rarity makes finding one on the used market very difficult.
• The wide beam can make finding slip space challenging in some marinas.
• Lack of a jib means the boat is slower to tack in very light wind and choppy seas.