The Brise de Mer 31 stands as a landmark in the evolution of French yacht design, representing a pivotal moment when aluminum transitioned from a specialized industrial material to a viable medium for production cruising boats. Designed by the esteemed Jean-Marie Finot of Groupe Finot and primarily built by the Le Guen Hemidy shipyard in France during the 1970s, this 31-foot cruiser was part of a series that challenged the dominance of fiberglass. The "LC" designation associated with the model often refers to the Luxe et Confort or specific production variants intended for long-distance voyaging. Built using AG4 MC aluminum alloy, the vessel offered a strength-to-weight ratio that was nearly unparalleled for its time, earning a reputation as a "pocket voyager" capable of crossing oceans that would intimidate other hulls of similar length.
LC Brise DE Mer 31 Information, Review, Specs

- Make
- LC
- Model
- Brise DE Mer 31
- Builder
- Chantiers Le Guen-Hemidy
- Designer
- Finot
- Number Built
- Production Year(s)
- 1970 - ??
Sailing Performance & Handling
The influence of Jean-Marie Finot is evident in the Brise de Mer 31’s hull lines, which emphasize a wide beam carried well aft and a relatively flat underwater profile. This design philosophy, which Finot also applied to early Vendée Globe contenders, allows the boat to plane earlier than many of its heavy-displacement contemporaries. Because aluminum construction is significantly lighter than the thick solid-glass layups of the 1970s, the Brise de Mer 31 possesses a high Sail Area to Displacement (SA/Disp) ratio, making it surprisingly nimble in light airs.
In heavy weather, the boat’s stiffness is a primary asset. Editorial archives from French maritime journals like Voiles et Voiliers describe the model as having a "dry" ride compared to its peers, thanks to its flared bow and significant flare. However, because it is a light-displacement hull for its era, it can be more "active" in a seaway, requiring the helmsman to stay attentive to trim. The spade rudder provides high maneuverability, though owners frequently note that the steering is sensitive, a characteristic often found in Finot's performance-oriented designs.
Interior Comfort & Variations
The interior of the Brise de Mer 31 is a study in 1970s functionalism. While many aluminum boats of this era can feel cold or "industrial," Le Guen Hemidy utilized extensive wood cabinetry to soften the aesthetic. The layout typically features a classic V-berth forward, a central salon with two settees that serve as sea berths, and a compact galley and navigation station flanking the companionway.
A key variation in the lineup includes the "Brise de Mer 31 Export," which occasionally featured slight modifications to the cockpit layout or internal ballast arrangements to suit different international markets. Sibling models built on similar design principles include the smaller Brise de Mer 28 and the larger 34 and 38 variants. The 31-foot model is often cited as the "sweet spot" of the range, offering enough waterline for passage-making while remaining manageable for a single-handed sailor. Headroom is generous for a boat of this vintage, hovering around 1.85 meters (6 feet), which was a significant selling point during its initial release.
Known Issues & Buyer’s Checklist
Prospective buyers of a Brise de Mer 31 must prioritize a specialized hull survey over a standard marine inspection. Aluminum hulls require a specific set of maintenance protocols that, if ignored, can lead to costly repairs.
- Galvanic Corrosion: The most critical area of concern is "electrolysis" or galvanic corrosion. Buyers should inspect the hull for pitting, particularly near the waterline and around through-hull fittings. It is essential to verify that previous owners have not mixed metals (e.g., using brass valves on an aluminum hull) without proper isolation.
- Thermal Insulation: Early aluminum boats often suffer from condensation issues if the insulation was not applied correctly. Check behind the cabinetry for signs of "sweating" or corrosion where the insulation meets the hull.
- Ballast Connection: The Brise de Mer 31 uses internal lead ballast, often encapsulated in resin or pitch. A common "gotcha" in older models is the degradation of this interface, which can lead to trapped moisture and internal corrosion of the aluminum hull plating.
- Deck-to-Hull Joint: While aluminum hulls are typically welded, the deck-to-hull joints on some variants may utilize mechanical fasteners and sealants that can leak over decades, leading to interior water damage.
Community & Resources
The Brise de Mer 31 enjoys a dedicated following, particularly in Europe. The Association des Propriétaires de Brise de Mer serves as the primary technical repository for the model, offering original blueprints, sail plans, and advice on aluminum hull maintenance. While the Le Guen Hemidy yard is no longer producing these vessels, the shared DNA with Finot-Conq designs ensures that technical data remains accessible through the designer's own archives.
The Verdict
The Brise de Mer 31 is an uncompromising sailor’s boat, offering a level of structural integrity and performance that few modern fiberglass production boats can match at this size. It is an ideal choice for the minimalist cruiser who prioritizes safety and speed over "condo-maran" interior volume.
Pros:
- Extremely robust aluminum construction ideal for high-latitude or blue-water cruising.
- Exceptional light-wind performance due to the Finot hull design and light displacement.
- High resale value among enthusiasts who recognize the pedigree of the Le Guen Hemidy shipyard.
Cons:
- Requires rigorous monitoring of electrical systems and zinc anodes to prevent hull corrosion.
- Can be prone to condensation in cold climates if not properly insulated.
- The light hull weight can result in a more motion-intensive ride in a confused seaway.
Measurements
Construction & Hull
- Construction Material
- Fiberglass/Aluminum Composite
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x Skeg-Hung
- Ballast
- 2205 lbs
- Displacement
- 6614 lbs
- Water Capacity
- 42 gal
- Fuel Capacity
- 16 gal
Dimensions
- Length Overall (LOA)
- 30.68 ft
- Waterline Length (LWL)
- 26.25 ft
- Beam
- 10.4 ft
- Draft
- 5.12 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- 31.5 ft
- E (Main Foot)
- 9.51 ft
- I (Foretriangle Height)
- 36.74 ft
- J (Foretriangle Base)
- 13.55 ft
- Forestay Length (est)
- 39.16 ft
- Sail Area
- 400 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 18.16
- Ballast / Displacement Ratio
- 33.34
- Displacement / Length Ratio (D/L) Ratio
- 163.24
- Comfort Ratio
- 16.38
- Capsize Screening Formula
- 2.22
- Hull Speed
- 6.87 kn