Gibert 30+ — Information, Review, Specs

Sailing Performance & Handling

Under sail, the Gibert 30+ exhibits the characteristic "stiff" behavior common to Joubert-Nivelt designs of that period. With a hull form influenced by IOR (International Offshore Rule) tendencies—specifically the relatively wide beam carried well aft and a pinched stern—the boat performs admirably on a reach. Its Displacement-to-Length ratio suggests a medium-displacement cruiser, providing a sense of security and momentum when punching through a head sea that lighter modern yachts might lack.

Owner reports and historical test summaries from French publications like Voiles et Voiliers highlight that the boat is surprisingly well-balanced. It does not suffer from the extreme weather helm often associated with IOR boats of the era, provided the mainsail is reefed early. The 30+ was typically fitted with a fin keel and a spade rudder, giving it a tight turning circle and responsive handling in marina settings. While not a "light air flyer," once the breeze exceeds 10 knots, the hull settles into a groove, tracking cleanly with a predictable motion that minimizes fatigue for a short-handed crew.

Interior Comfort & Variations

The interior of the Gibert 30+ was considered remarkably spacious for its time, utilizing the 10-foot-plus beam to create an open and social atmosphere. The layout generally follows a traditional plan: a V-berth forward, a central saloon with a folding table, and a dedicated galley and navigation station flanking the companionway. Because this is the "Plus" variant, the woodwork is often more substantial than on earlier models, utilizing teak or mahogany veneers that lend a warm, traditional maritime feel.

One of the significant variations found in this hull series is the transition from a quarter berth to a more enclosed aft cabin in later hull numbers. The sibling Gib’Sea 31, built on a similar but slightly extended platform, offered a more defined aft cabin, but the 30+ maximizes its internal volume through an open-plan feel that makes the vessel seem larger than its 30-foot length. Headroom is generous, typically exceeding 6 feet in the main saloon, which remains a primary selling point for sailors transitioning from smaller day-sailers to coastal cruisers.

Known Issues & Buyer’s Checklist

Prospective buyers of a Gibert 30+ should approach the vessel with a focus on its structural age. According to technical discussions commonly found among French owner circles and general yacht surveyors, there are several high-signal areas for inspection:

1. Osmotic Blistering: Like many GRP hulls produced in the late 1970s and early 1980s, the Gibert 30+ is susceptible to osmosis. While rarely structural, a moisture meter test of the hull below the waterline is essential.
2. Deck Core Integrity: The deck is a sandwich construction. Areas around the chainplates, stanchion bases, and the mast step are prone to water ingress, which can rot the balsa core. Any "sponginess" underfoot should be viewed as a significant repair item.
3. Keel-to-Hull Joint: The transition where the cast iron keel meets the GRP stub should be inspected for the "smile" crack, indicating potential fatigue in the keel bolts or compression of the hull laminate.
4. Original Engine Reliability: Many of these boats were originally fitted with Volvo Penta or Yanmar diesels. At this age, the heat exchangers, salt-water pumps, and exhaust elbows should be scrutinized for corrosion or blockage if they have not been recently replaced.

Community & Resources

Owners of the Gibert 30+ often find community support through the broader Gib’Sea owner associations. The most prominent technical resource is the Association des Propriétaires de Gib'Sea (APG), which maintains a repository of historical brochures, wiring diagrams, and specific maintenance advice for the Joubert-designed hulls. While the builder, Gibert Marine, no longer exists as an independent entity, the simplicity of the boat's systems means that most parts are generic and easily sourced through standard marine suppliers.

The Verdict

The Gibert 30+ is a quintessential "honest" cruiser. It does not pretend to be a modern racing machine, nor does it possess the luxury finishes of a contemporary yacht, but it offers a robust and seaworthy platform for sailors who value structural integrity and classic lines.

Pros:

• Predictable and seaworthy handling in heavy weather.
• Spacious interior for a 30-foot vintage vessel.
• Solid GRP construction from a reputable era of French boatbuilding.
• Excellent value as an entry-level coastal cruiser.

Cons:

• Susceptibility to osmosis in older hulls.
• IOR-influenced hull shape can be prone to rolling downwind.
• Balsa-cored decks require vigilant maintenance to prevent rot.
• Original mechanical and electrical systems will likely require modernization.