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Ovni 43
Designer: Philippe Briand  ·  Builder: Alubat (Fra)  ·  First built: 1991
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About the Ovni 43

French designer Philippe Briand created a distinctive offshore cruiser when he penned the Ovni 43 for aluminum specialist Alubat. Built from 1991 to 2000, this 42-foot masthead sloop represents the innovative centerboard design philosophy that made the Ovni series famous among serious cruising sailors seeking shallow-water versatility without compromising blue water capability. The aluminum construction provides exceptional durability for extended offshore passages, while the centerboard trunk design allows access to shallow anchorages and beaching opportunities unavailable to traditional deep-keel cruisers. With an 8.20-foot maximum draft that reduces significantly when the board is raised, the Ovni 43 opens up entire cruising grounds typically off-limits to boats of this size. Briand's design emphasizes seaworthiness with a substantial displacement of 18,739 pounds and generous ballast ratio. The relatively conservative sail area and robust construction make this an ideal platform for ocean crossing and extended cruising in challenging conditions. The Ovni's reputation for self-sufficiency and ability to dry out safely on tidal beaches has made it particularly popular with European cruisers and those planning extended voyages to remote destinations where traditional marina facilities are scarce.

Core Dimensions
LOA (Length Overall) 42.32 ft / 12.90 m
LWL (Waterline Length) 34.12 ft / 10.40 m
Beam 14.11 ft / 4.30 m
Max Draft 8.20 ft / 2.50 m
Min Draft 2.62 ft / 0.80 m
Displacement 18,739.00 lb / 8,500 kg
Ballast 7,937.00 lb / 3,600 kg
Sail Area (Reported) 968.00 ft² / 89.93 m²
Design & Construction
Hull Type Centerboard (Trunk)
Rigging Type Masthead Sloop
Construction Aluminum
Designer Philippe Briand
Builder Alubat (FRA)
First Built 1991
Last Built 2000
Associations Alubat Ovni Club
Owner Reviews

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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 22.04
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 42.36
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 210.61
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 23.32
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 2.13
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.83 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1,720.21 pounds/inch
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