Built entirely from welded aluminum, the 455 reflects the Briand-era Ovni approach: a beachable, shoal-draft voyaging boat that can also sail hard.
Design and Construction
Alubat welded both the hull and deck from aluminum rather than assembling them from composites. The hull is a solid aluminum shell.
The lifting keel gives the 455 a maximum draft of 7.87 feet and retracts to 2.62 feet. That range allows her to dry out or enter shoal anchorages beyond the reach of a fixed-keel 49-footer.
With a beam of 14.27 feet and a displacement-to-length ratio of 167.17, she is beamy and comparatively light for a cruising boat of this size. The design data classify her as a light sailboat. Her capsize screening value is 1.92, and the data indicate good righting capability if capsized, placing her among the more self-respecting offshore-capable cruisers of her era according to the published figures.
Rig, Performance, and Handling
The 455 carries a cutter rig with a 100 percent sail area of 1,140.97 square feet. Her sail-area-to-displacement ratio is 20.64. These figures support the straightforward assessment that she is a high performer and a stable, stiff boat under sail. Calculated hull speed is 8.62 knots.
A single 60-horsepower Volvo Penta MD22 diesel provides auxiliary power. Published specifications list 106 gallons of fuel capacity and a 159-gallon water supply range, figures suited to extended cruising without frequent reprovisioning. The published review rates her as best suited to fast cruising, rather than service as a bareboat weekender.
Accommodation
The source lists 6.46 feet of headroom, confirming a standing interior despite the aluminum hull’s hard chines. Its database fields also record zero cabins, zero berths, and zero heads. That reflects a gap in the surveyed record, not a boat without an interior. The design’s cruising purpose and water supply range point to a finished living space, but the documentation doesn’t itemize the layout. Buyers and reviewers should therefore treat the accommodation count as unstated rather than open-plan.
Known Issues
Aluminum construction brings a general risk of electrolysis in marina environments. However, the sources don’t report such damage as prevalent on this model, nor do they attribute any recurring defect to the 455’s lifting keel, rudder, or deck join. A surveyor’s judgment on an individual hull outweighs any model-wide assumption.
Refits and Ownership
Production ran from 1994 through 2007, a thirteen-year period during which Alubat refined the Briand design. There is no documented successor generation carrying the 455 name.
Owning a 455 today means maintaining an aluminum hull that avoids the deck-core rot common to composite cruisers. The lifting-keel mechanism and trunk, however, require the same vigilance as any retractable appendage. The 60-horsepower Volvo Penta remains a serviceable auxiliary, while the generous tankage reduces pressure for immediate systems upgrades on a voyaging boat.
Verdict
The Ovni 455 is a distinctly capable aluminum fast cruiser. Her shoal-draft lifting keel and stiff, light hull suit both ocean passage-making and gunkholing. Philippe Briand’s design and Alubat’s welded construction give her a clear identity among 1990s cruising boats, even though the published data leave her interior arrangement unresolved.
Pros
- Welded aluminum hull and deck, with no composite core to rot
- Lifting keel: 2.62 ft retracted and 7.87 ft extended
- Stiff and stable, with good righting capability if capsized; capsize screening value of 1.92
- Generous tankage: 106 gal fuel and 159 gal water
- Light, high-performing cutter rig for a 49-footer
Cons
- Cabin, berth, and head counts are unstated in the record
- Air draft, sail-plan dimensions, and rudder type aren’t detailed by the sources
