Defender 27 Information, Review, Specs

Sailing Performance & Handling

Under sail, the Defender 27 is often described as a "stiff" and predictable performer, largely due to a ballast-to-displacement ratio that frequently exceeds 40%. With a displacement of approximately 2,500 kg and a fin keel carrying roughly 1,100 kg of lead or cast iron, the boat stands up well to a breeze, making it a favorite for the choppy conditions of the IJsselmeer and the North Sea. The underwater profile features a moderately deep fin keel and a skeg-hung rudder, a configuration that offers a superior compromise between the agility of a spade rudder and the tracking stability of a full-keel cruiser.

Technical analysis of its sail area-to-displacement ratio (approximately 19.3) suggests a vessel that is surprisingly capable in light air for its era, though it truly finds its stride in 10 to 15 knots of wind. Owners frequently report that the boat tracks well off the wind, thanks to the skeg-protected rudder, which provides a tactile, weighted feel at the tiller. While it does not possess the explosive acceleration of modern lightweight sportboats, its momentum and "big boat" feel allow it to punch through head seas without the hobby-horsing common in flatter-bottomed designs.

Interior Comfort & Variations

For a 27-foot vessel designed in the early 1970s, the Defender 27 offers a surprisingly functional interior that maximizes its 2.50-meter beam. The layout is traditional: a V-berth forward, a central salon with two longitudinal settees that double as sea berths, and a compact galley located near the companionway for optimal ventilation. The use of warm hardwoods—typically mahogany or teak veneers—was a hallmark of Dekker & Sons, providing a nautical aesthetic that has aged better than the "all-plastic" interiors of some contemporary competitors.

Headroom is approximately 1.75 meters (5'9"), which was generous for the period but may feel tight for taller modern sailors. Variations of the Defender 27 occasionally appear with different cockpit arrangements, but the primary hull stayed consistent throughout its production run. Its larger siblings, the Defender 32 and 35, utilized the same material philosophy but offered standing headroom and dedicated navigation stations, which the 27 incorporates more modestly into the salon table design.

Known Issues & Buyer’s Checklist

Prospective buyers of a Defender 27 should prioritize a rigorous structural inspection, focusing on the common aging points of 1970s fiberglass construction:

• Osmotic Blistering: Like many yachts from the early "thick-laminate" era, some hulls have shown signs of osmosis. While rarely structural in these over-built boats, it is a significant maintenance consideration.
• Deck Core Integrity: The decks are often cored with balsa or foam; moisture ingress through poorly bedded deck hardware (cleats, stanchions, or winches) can lead to delamination and soft spots.
• Chainplate Anchors: Inspect the points where the shrouds meet the bulkheads. Any signs of water staining or movement in the wood indicates a need for immediate re-bedding and potential structural reinforcement.
• Original Engines: Many units were originally fitted with Farymann or early Volvo Penta diesel engines. While reliable, sourcing parts for 50-year-old engines can be difficult; many well-maintained examples have since been repowered with Yanmar or Beta Marine units.
• Window Leaks: The aluminum-framed windows are prone to seal failure over time, which can lead to interior wood damage if left unaddressed.

Community & Resources

The Defender 27 benefits from a dedicated following in Northern Europe, particularly through the Defender Yacht Club, a Dutch-based association that preserves the history and technical specifications of the Dekker-built fleet. While the shipyard closed its doors in 1986, this community remains the primary repository for original sail plans and hull data.

The Verdict

The Defender 27 is an exemplary vintage cruiser for those who value traditional Dutch build quality and "seakindly" French design over modern interior volume. It remains an affordable and sturdy entry point into coastal cruising.

Pros

• Exceptional stability and stiffness in heavy weather.
• High-quality interior joinery compared to mass-produced counterparts.
• Classic, balanced lines that have aged gracefully.
• Strong community support via Dutch owner associations.

Cons

• Headroom is limited for taller sailors.
• Original engines and electrical systems likely require modernization.
• Susceptibility to deck core moisture if maintenance has been neglected.