Alubat Ovni 30 — Information, Review, Specs

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The Alubat Ovni 30 is a quintessential example of the "4x4 of the seas" philosophy that has defined the Les Sablesd'Olonne shipyard for decades. Designed by Philippe Briand and built in marinegrade aluminum (AG4 MC), this 9meter cruiser was one of the models that cemented the "dériveur intégral" (fully lifting centerboard) concept in the late 1980s. Unlike many of its contemporaries that relied on fiberglass, the Ovni 30 was engineered for durability, beaching capability, and highlatitude exploration. Approximately 150 units were produced, serving as the entrylevel gateway into a range that eventually expanded to include much larger bluewater legends.

Measurements

Dimensions 01

Length overall
Length on deck
Waterline length
Beam
Draft
Maximum headroom
Air draft

Construction & hull 02

Construction
Hull type
Keel type
Ballast
Displacement
Water capacity
Fuel capacity

Rig & sails 03

Rig type
Mainsail luff
Mainsail foot
Foretriangle height
Foretriangle base
Forestay length (estimated)
Sail area

Calculations 04

Sail area to displacement ratio
Ballast to displacement ratio
Displacement to length ratio
Comfort ratio
Capsize screening formula
Hull speed

Sailing Performance & Handling

The Ovni 30 is characterized by its high-stability hull and the versatility provided by its lifting keel system. With the centerboard fully retracted, the boat draws only 0.50 meters, allowing it to enter shallow estuaries and lagoons that are inaccessible to most fin-keel cruisers. Under sail, the boat utilizes a chined hull design that provides significant form stability. According to technical documentation found via Ovniclub, the vessel typically carries a displacement of roughly 4.5 tons, which, combined with its relatively modest sail area of 34 m² upwind, results in a steady, sea-kindly motion rather than blistering speed.

The handling feels deliberate and secure. While it lacks the "bite" of a deep-draft racing yacht when beating into the wind, it tracks remarkably well when the centerboard is down. Off the wind, the ability to partially raise the board reduces drag and prevents "tripping" over the keel in heavy following seas, a trait often praised in Mers et Bateaux editorial reviews. The helm is generally responsive, though owners often note that the boat performs best when kept relatively upright to engage the hard chines effectively.

Interior Comfort & Variations

Despite its rugged exterior, the interior of the Ovni 30 is designed for functional liveaboard comfort during extended coastal or offshore passages. The layout typically features two distinct cabins: a V-berth in the bow and a double aft cabin tucked under the cockpit. The main saloon is surprisingly airy for a 30-foot vessel, benefited by the light reflecting off the light-toned wood finishes commonly used by Alubat.

Headroom in the main cabin is generous at approximately 1.80m, ensuring that most sailors can stand comfortably at the galley or chart table. The galley is typically L-shaped, equipped with a two-burner stove and a deep sink, while the central table accommodates the centerboard trunk, which is neatly integrated into the furniture. A common variation found in the sibling Ovni 32 (the immediate successor built on a slightly lengthened version of this design logic) includes a more refined stern platform and slightly more volume in the aft cabin, but the fundamental 30-foot footprint remains focused on maximizing storage for long-distance supplies.

Known Issues & Buyer’s Checklist

When inspecting an Alubat Ovni 30, the primary concern is the integrity of the aluminum hull and the prevention of galvanic corrosion. Buyers should prioritize the following areas:

  • Electrolysis & Anodes: Check for "pitting" around the waterline and through-hull fittings. Ensure that previous owners have not introduced "stray current" by installing copper-based bottom paint or improper electrical grounding, which can rapidly degrade the aluminum.
  • Centerboard Mechanism: Inspect the lifting cable (usually stainless steel or synthetic) and the pivot pin. The board should move freely without excessive clunking, which could indicate worn bushings or a bent board.
  • Insulation & Condensation: Early aluminum boats can suffer from "sweating" if the insulation (often spray-foam or closed-cell panels) has gaps. Check behind lockers for signs of trapped moisture or "white powder" corrosion.
  • Engine Mounts & Seals: Since the engine is often a Yanmar 3GM30F, check the mounts for vibration damage and the shaft seal (press-étoupe) for leaks, as saltwater in the bilge is particularly problematic for aluminum hulls.

Community & Resources

The most prominent technical resource for this model is the Ovniclub, an international association of owners that provides technical wikis, maintenance guides, and a registry of modifications. Additionally, the original manufacturer Alubat maintains a historical archive and still offers support for parts and refurbishments at their French facility.

The Verdict

The Alubat Ovni 30 is a rare find on the brokerage market—a compact, bulletproof cruiser that can literally sail onto a beach and remain upright as the tide recedes. While it lacks the refined speed of a fiberglass performance cruiser, its structural integrity and shallow-water access are unmatched in this size class.

Pros:

  • Rugged Construction: The 5086-series aluminum hull is exceptionally impact-resistant.
  • Shallow Draft: 0.50m draft allows for unique "creek-crawling" and easy beaching.
  • Blue-Water Pedigree: Built by a yard synonymous with world-girdling reliability.

Cons:

  • Maintenance Sensitivity: Requires strict adherence to electrical and paint protocols to prevent corrosion.
  • Upwind Performance: The flat-bottomed hull and centerboard design result in more leeway than a fixed-keel boat in light air.
  • Limited Availability: With only 150 built, finding a well-maintained unit can be difficult.

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