Chassiron GT Information, Review, Specs

Sailing Performance & Handling

The Chassiron GT is a quintessential "sailor's boat" designed for stability and comfort over raw speed. Its displacement of approximately 7,500 kg (16,535 lbs) and a substantial ballast ratio of 40% (3,000 kg) give the vessel a high motion comfort ratio, making it an excellent platform for offshore passages. Under sail, the masthead ketch rig—the standard configuration for the GT—provides a versatile sail plan that is easily managed by a short-handed crew. This setup allows for various combinations to balance the helm in heavy weather, such as sailing under "jib and jigger" (headsail and mizzen) when the mainsail becomes too much to handle.

With a Sail Area/Displacement (SA/Disp) ratio of approximately 18.3, the boat is surprisingly capable in light to moderate winds for its weight class, though it truly shines when the wind freshens. The long keel provides exceptional directional stability, allowing the boat to track straight with minimal input from the helm, a trait highly praised in editorial reflections on the Classic Sailor technical archives. However, prospective owners should be aware that the same long keel that aids in tracking makes the GT less nimble in tight marina quarters; prop walk and a wide turning circle are characteristic of the design.

Interior Comfort & Variations

The interior of the Chassiron GT is widely regarded as one of the finest examples of French serial joinery from the late 1970s. Utilizing high-grade mahogany and teak, the cabin evokes the "old world" charm of a traditional wooden yacht. The layout typically features a spacious forward V-berth, a heads compartment with an integrated shower, and a large salon where the settees can be converted into additional berths. The galley and navigation station are positioned near the companionway for convenience at sea.

One of the most notable features of the GT is its 1.88-meter (6'2") headroom, which is generous for a boat of this vintage and hull shape. The model was often built alongside its sibling, the Chassiron RF (Régate Fond). While the RF was frequently configured as a sloop with a tiller and a more utilitarian deck layout, the GT focused on the luxury of the "Grand Tourisme" experience, often featuring a wheel-steered cockpit and the iconic mahogany coachroof. Other siblings built on similar principles include the Chassiron Junior (7.7m) and the Chassiron CF (9.2m), though the GT remains the most sought-after for long-distance cruising due to its increased volume and tankage.

Known Issues & Buyer’s Checklist

The Chassiron GT’s greatest aesthetic asset—its extensive wood use—is also its primary maintenance liability. Buyers should focus their inspections on the following areas:

• Deck and Coachroof Integrity: The mahogany coachroof and teak-over-plywood decks are prone to leaks if the caulking or varnish has been neglected. Inspection should focus on soft spots in the plywood sub-deck and water ingress around the ten "Goiot" brand portholes.
• Hull-Deck Joint: Because the wooden superstructure is bolted and bonded to a fiberglass hull, the joint can experience stress over decades. Signs of weeping or interior water damage along the shear line should be investigated.
• Osmosis: While Chantier Richard hulls are famously thick (up to 30mm in the floors), early GRP boats of this era can exhibit osmotic blistering. A moisture meter test on the hull is essential.
• Original Mechanicals: Many units still carry their original 40–50 HP diesel engines (often Perkins or Yanmar). While robust, parts for specific older models may be becoming scarce.
• Keel Bolts: Although the ballast is encapsulated in many Chassiron models, some GT variants used internal iron ballast that may require inspection for corrosion-related swelling within the keel structure.

Community & Resources

The most prominent resource for technical support and historical data is the Association des Propriétaires de Chassiron (APC), which maintains a presence on major French sailing portals like Hisse et Oh. This community provides access to original sail plans, wiring diagrams, and specific advice on restoring the signature mahogany "hiloires" (coaming boards) that define the model's profile.

The Verdict

The Chassiron GT is a "proper" yacht for the traditionalist who values sea-kindliness and craftsmanship over modern "floating apartment" designs. It is a robust offshore cruiser that demands a high level of aesthetic maintenance but rewards the owner with a timeless silhouette and a safe, predictable motion in a seaway.

Pros:

• Exceptional build quality and high-end mahogany interior joinery.
• Stable, heavy-weather performance with high motion comfort.
• Versatile ketch rig and excellent tracking thanks to the long keel.
• Classic "gentleman's yacht" aesthetic that draws attention in any port.

Cons:

• High maintenance requirements for the wooden superstructure and teak decks.
• Difficult to maneuver in reverse and tight spaces due to the long keel.
• Slower than modern fin-keel cruisers in light air and when pointing upwind.