Jongert 20s Information, Review, Specs

Sailing Performance & Handling

The Jongert 20s is a ketch-rigged powerhouse that prioritizes stability and sea-kindliness over raw speed in light air. With a displacement often exceeding 45 tons, the vessel possesses significant momentum, allowing it to power through heavy chop that would slow lighter fiberglass yachts. The split ketch rig is a functional choice for this hull type, allowing a small crew to balance the sail plan easily by reefing the mainsail while keeping the mizzen and staysail active to maintain tracking.

While specific technical ratios like the Sail Area/Displacement (SA/Disp) ratio for the 20s lean toward the lower end of the performance spectrum, this is intentional. The boat is designed for "passagemaking under comfort," where the weight of the steel hull provides a dampened motion in a seaway. According to technical archives from the Jongert Shipyard, these vessels were engineered for long-range autonomy, often featuring deep-draft scheel keels or full-length keels that ensure exceptional directional stability. This means the 20s tracks exceptionally well on a reach, requiring minimal input from the autopilot or helmsman once the sails are trimmed.

Interior Comfort & Variations

The interior of the Jongert 20s is a masterclass in traditional Dutch joinery, typically finished in high-grade teak or mahogany. Unlike the "T" series, which often featured an aft-heavy "great cabin" with windows in the transom, the 20s usually adopts a more centralized deck saloon configuration. This layout connects the sheltered cockpit to a raised social area, providing the helmsman and guests with 360-degree visibility while protected from the elements.

The standard configuration generally includes a massive full-beam owner’s stateroom aft, complete with an en-suite head and often a private seating area. Forward of the salon, the galley and dinette provide a secondary living space, leading to guest cabins in the bow. Sibling models, such as the Jongert 20T, share the same 20-meter hull platform but differ significantly in deckhouse height and bow shape; the 20s features a more raked bow and a lower-profile coachroof, which reduces windage and gives the boat its "sport" designation. Some custom variations were also produced, including the Jongert 21s, which utilized an extended transom for a larger swim platform and additional lazarette storage.

Popular Mentions & Media

The Jongert 20s and its close siblings have long been the choice of experienced circumnavigators and high-profile owners who value anonymity and safety. While not a frequent subject of racing media, the model is a staple in "blue water" literature. The 20s series is often cited in long-term cruising journals for its ability to withstand extreme conditions, such as those found in the high latitudes or during Atlantic crossings. The shipyard's reputation for quality is such that a Jongert 20s is often referred to in nautical circles as a "nautical vault."

Known Issues & Buyer’s Checklist

When inspecting a Jongert 20s, the primary focus must be on the integrity of the metalwork and the aging of complex systems. As a steel-hulled vessel, potential buyers should prioritize a professional ultrasonic hull survey to check for plate thinning, particularly in the bilges and around the chain lockers.

1. Teak Deck Longevity: Jongert decks were traditionally thick and high-quality, but many 20s models are now reaching the end of their original deck life. Check for thinning wood and failing caulking, which can lead to moisture entrapment against the steel sub-deck.
2. Galvanic Corrosion at the Join: The 20s utilizes an aluminum superstructure bolted or welded to a steel hull. If the bimetallic insulation (often using "Triclad" or similar transitions) has failed, galvanic corrosion can occur at the interface. Look for bubbling paint or white powdery deposits along the deck-to-coachroof joint.
3. Hydraulic Systems: Most 20s models rely heavily on hydraulics for furling, winches, and bow thrusters. These systems are robust but require meticulous maintenance. Check for leaks in the manifold and the age of the high-pressure hoses.
4. Tankage Access: In a steel boat of this age, the internal condition of fuel and water tanks is critical. Verify if the tanks have been coated or if there is evidence of "diesel bug" or internal corrosion, as replacing integrated steel tanks is a major structural undertaking.

Community & Resources

Owners of these vessels are supported by the Jongert Owners' Club, an organization that facilitates the sharing of technical drawings and refit advice. Because Jongert maintains a detailed "Heritage" archive, owners can often retrieve original hull lines and electrical schematics directly from the shipyard in Wieringerwerf. Technical discussions regarding the maintenance of these specific hulls are frequently found on high-authority platforms like the Royal Netherlands Academy of Arts and Sciences (KNAW) maritime history archives, which document the evolution of Dutch steel yacht building.

The Verdict

The Jongert 20s is a "forever boat" for the sailor who prioritizes safety, craftsmanship, and the unmistakable prestige of Dutch engineering. While it requires more maintenance than a modern production laminate yacht, its longevity and heavy-weather performance are nearly peerless in the 65-foot class.

Pros:

• Indestructible Build: The steel hull offers peace of mind for rocky coastlines or floating debris.
• Timeless Aesthetic: The S-line profile remains elegant decades after launch.
• Exceptional Motion: A heavy-displacement hull that minimizes fatigue during long passages.
• Resale Value: Jongerts are globally recognized and retain value far better than mass-market cruisers.

Cons:

• Maintenance Intensive: Steel and aluminum require constant vigilance against corrosion.
• Light Air Performance: The boat's weight makes it sluggish in winds under 10 knots without engine assistance.
• Draft Constraints: The deep keel required for stability may limit access to some shallow-water cruising grounds.