Jongert 31T Information, Review, Specs

Sailing Performance & Handling

The 31T is a heavy-displacement cruiser that relies on momentum and a powerful ketch sail plan to navigate offshore conditions. With a displacement often exceeding 150 tons, the boat is remarkably sea-kindly, muting the motion of the ocean in a way that lighter fiberglass or carbon yachts cannot match. The ketch rig is a strategic choice for a vessel of this scale; by dividing the total sail area between a main and a mizzen mast, the crew can more easily manage sail changes and balance the boat in heavy weather.

While not a light-air specialist, the 31T performs admirably once the breeze exceeds 12 to 15 knots. Its long keel and deep draft provide excellent tracking, making it a "hands-off" sailor on long reaches. Most 31T models were equipped with sophisticated hydraulic furling systems for the genoa, staysail, main, and mizzen, allowing the yacht to be handled by a relatively small professional crew or even a highly experienced owner-operator. Reports from technical reviews in publications such as Boat International often highlight the 31T’s ability to maintain high average speeds under power and sail, frequently cruising at 10 knots using its reliable Mercedes-Benz or MTU diesel engines when the wind fades.

Interior Comfort & Variations

The interior of the Jongert 31T is where the shipyard’s "Masterpiece" slogan truly manifests. The layout is centered around the signature Jongert deck saloon, which provides 360-degree visibility while remaining protected from the elements. Below decks, the 31T typically features a massive full-beam owner’s suite aft, a hallmark of the Traditional series. This cabin often includes the famous Jongert "stern windows," providing a breathtaking view of the yacht’s wake.

Variations between hulls are common, as Jongert allowed significant customization. While the standard layout includes the aft master and two or three guest cabins forward of the engine room, some hulls were configured with a more formal dining area or an expanded galley for charter service. The joinery is almost universally executed in high-gloss teak or mahogany, with craftsmanship that Jongert Shipyard remains famous for today. Headroom is generous throughout, often exceeding 6'6", and the heavy insulation typical of Dutch steel construction ensures that the interior remains whisper-quiet even while the generator or engine is running.

Popular Mentions & Media

Several hulls in the 31T series have gained notoriety in the superyacht community for their extensive world travels. The yacht Ameena (formerly Sunbeam) is one of the most well-documented examples of the 31T, often cited in editorial retrospectives regarding the longevity of Dutch steel yachts. These vessels frequently appear in "Top 100" lists for classic sailing superyachts and are mainstays at prestigious events like the St. Barths Bucket or the Palma Superyacht Cup, though they usually participate in the "Corinthian" classes focused on elegance and spirit of tradition rather than pure speed.

Known Issues & Buyer’s Checklist

Prospective buyers of a Jongert 31T must approach the purchase with the mindset of maintaining a small ship rather than a fiberglass sailboat.

• Steel Hull Integrity: While Jongert’s steelwork is world-class, any yacht of this age (mostly built in the 1980s and 90s) requires a thorough ultrasonic hull thickness survey. Particular attention must be paid to the "wet areas" such as chain lockers and areas beneath the teak deck where standing water can cause localized corrosion.
• Hydraulic Systems: The 31T is a complex machine with extensive hydraulic networks powering the winches, furlers, and bow thrusters. These systems require meticulous maintenance; a checklist should include testing all manifolds for leaks and verifying the age of high-pressure hoses.
• Teak Deck Longevity: Jongert decks were traditionally thick and laid in bedding compound, but after 20-30 years, many 31T models will be approaching or have already undergone a full deck replacement. This is a significant capital expense that must be accounted for in the valuation.
• Paint Systems: Maintaining the high-gloss finish on a steel and aluminum yacht requires a consistent "fairing and painting" schedule. Buyers should investigate the date of the last full Awlgrip or Alexseal application.

Community & Resources

Owners and enthusiasts of the 31T are supported by the Jongert Owners Club, an organization that facilitates the sharing of technical drawings, refit histories, and organized rallies. Because Jongert hulls were built to such high standards, the yard (now part of the VeKa Group) often retains original blueprints and hull-specific data, which can be accessed through their service and refit department in the Netherlands.

The Verdict

The Jongert 31T is an "investment grade" sailing yacht for the mariner who values heritage, safety, and the ability to live aboard in luxury anywhere in the world. While its maintenance requirements are higher than a modern production boat, its resale value and "anywhere, anytime" capability remain virtually unmatched in the 100-foot category.

Pros:

• Exceptional sea-kindliness and stability in heavy weather.
• World-class Dutch craftsmanship and interior joinery.
• Redundant systems designed for long-range autonomous cruising.
• Iconic "Traditional" styling that remains timeless in any marina.

Cons:

• High maintenance costs associated with steel hull and complex hydraulics.
• Significant displacement makes it sluggish in light winds.
• Large crew requirements compared to modern performance sloops of the same length.