Jongert Trewes Commodore Information, Review, Specs

Sailing Performance & Handling

At sea, the Trewes Commodore is defined by its "S-spant" or S-shaped hull and a traditional long keel, a combination that provides exceptional directional stability and a soft motion in a seaway. With a displacement ranging between 6,000kg and 7,000kg, the boat carries significant momentum, making it less affected by choppy water than lighter modern alternatives. The V-shaped forward sections are designed to slice through waves rather than pound against them, which, according to technical archives at Trewes, results in "decent sailing characteristics" even when the weather turns foul.

The vessel’s ballast ratio and deep, safe-feeling cockpit contribute to a high sense of security for the crew. While it is not a "light air" performer due to its high displacement-to-length ratio, it excels once the breeze exceeds 12–15 knots. Most models were rigged as masthead sloops or occasionally as ketches, with a sail plan where the mainsail and the foretriangle are roughly equal in size, allowing for easy balancing of the helm. Owners often note that the boat can be handled solo or short-handed with ease, thanks to its steady tracking and predictable response.

Interior Comfort & Variations

The interior of the Trewes Commodore reflects the high-standard cabinetry for which Jongert would later become legendary. Mahogany is the predominant wood used for the bulkheads and joinery, often contrasted with white headliners to maintain a sense of space despite the traditionally narrower beam of the era. The layout typically provides five berths: a V-berth in the forward cabin, two longitudinal settees in the saloon, and a pilot berth or quarter berth.

Headroom is surprisingly generous for a 31-foot yacht of this vintage, reaching approximately 1.85 meters (6 feet 1 inch) at the main companionway. The Commodore was part of a larger family of hulls designed by van der Meer and built by Jongert, which included the smaller Trewes I and IA, the larger Trewes IIA and IIB (approx. 9.80 meters), and specialized variants named the Trewes Captain and the Trewes Privateer. These siblings shared the same core philosophy of steel construction and seaworthiness but offered varying degrees of luxury and length to suit different owner requirements.

Known Issues & Buyer’s Checklist

Purchasing a classic steel yacht like the Trewes Commodore requires a specialized approach during the survey process:

• Interior Corrosion: Because steel hulls often rust from the "inside out" due to trapped condensation, it is vital to inspect the bilges and areas behind the insulation. Particular attention should be paid to the chain locker and the area beneath the engine, where moisture can sit undisturbed for years.
• Deck-to-Hull Joint: Many of these yachts were fitted with teak decks over steel. If the teak has failed, water can seep between the wood and the steel sub-deck, leading to significant hidden corrosion.
• Rigging and Spars: Early Commodores were often equipped with wooden masts. These must be checked for rot or delamination, especially at the spreaders and the mast base. Many owners have since upgraded to aluminum, which simplifies maintenance but changes the classic aesthetic.
• Engine Reliability: Given the age of these vessels, the original powerplants (often Sabb or early Perkins units) may be at the end of their service life. Access for a full repower is generally good, but the condition of the engine beds and the stern gland should be verified.

Community & Resources

Owners and enthusiasts of this classic Dutch lineage are supported by the Trewes association, which maintains historical records and technical drawings for the various iterations of the van der Meer designs. Furthermore, the Jongert yard continues to operate in the Netherlands, primarily focusing on superyacht refits and large custom builds, but they remain a source of historical pride for owners of these original "breakthrough" sailing yachts.

The Verdict

The Jongert Trewes Commodore is a "little ship" in every sense of the word, offering the build quality of a luxury yard in a manageable, pocket-cruiser size.

Pros

• Exceptional build quality and traditional Dutch woodcraft.
• Extremely seaworthy and stable in heavy weather.
• Directional stability makes for relaxed, long-distance cruising.
• A prestigious pedigree from one of the world's top shipyards.

Cons

• Steel hull requires vigilant maintenance to prevent corrosion.
• Heavier displacement means slower performance in light winds.
• Original wooden masts (if present) require significant seasonal upkeep.