The Val 31 is a classic cruiser-racer that emerged from the South American boatbuilding boom of the 1970s and 1980s, primarily constructed by the Argentinian shipyard Astilleros Val-Mar. Designed by the renowned Swedish naval architect Einar Ohlson—famous for the Ohlson 38 and several Olympic 5.5-meter champions—the Val 31 represents a transitional era in yacht design. It blends the traditional seaworthiness associated with Ohlson’s Scandinavian roots with the International Offshore Rule (IOR) influences prevalent during its production. The boat was a staple of the Río de la Plata racing circuit and remains a respected coastal cruiser today, known for its robust construction and ability to handle the choppy, shallow conditions typical of Argentinian and Uruguayan estuaries.
Val 31 Information, Review, Specs

- Make
- Val
- Model
- 31
- Builder
- Dafy Duck Marine
- Designer
- Dick Newick
- Number Built
- 30
- Production Year(s)
- 1975 - ??
Sailing Performance & Handling
The sailing characteristics of the Val 31 are defined by its IOR-era heritage, featuring a moderate displacement-to-length ratio that provides a sense of stability and momentum in heavy air. With a displacement of approximately 8,400 lbs (3,800 kg), the boat tracks exceptionally well upwind, a hallmark of Einar Ohlson’s hull shapes. However, users often note that the boat exhibits the typical IOR "tumblehome" (the hull narrowing toward the deck), which can lead to a degree of "cranking" or rhythmic rolling when sailing deep downwind in following seas.
In lighter air, the Val 31 requires a generous headsail to overcome its wetted surface area, but as the breeze freshens, the hull finds its groove. The steering is typically responsive, though the high-aspect-ratio rudder of that era can lose grip if the boat is allowed to heel excessively. Anecdotal evidence from regional racing archives suggests that the Val 31 is particularly "sea-kindly," punching through short-period chop without the slamming common in flatter-bottomed modern designs.
Interior Comfort & Variations
The interior of the Val 31 is traditional and utilitarian, reflecting the craftsmanship of the Val-Mar yard. The layout usually follows a standard plan: a V-berth forward, followed by a full-width head compartment, and a main salon with settee berths that double as sea berths. The use of mahogany or similar regional hardwoods is extensive, creating a warm, enclosed atmosphere that is highly valued by traditionalists. Headroom is adequate for a 31-footer of this vintage, typically hovering around 6 feet in the main cabin.
While the Val 31 was the most popular of its series, sibling models built on similar design philosophies included the larger Val 38 and the smaller Val 28 (occasionally referred to as the Valmora 28). There were also minor variations within the 31-foot line, including a "Regata" version with a taller mast and a simplified interior to reduce weight, and a "Crucero" (Cruising) version which featured more substantial cabinetry and larger water tankage for extended voyaging.
Known Issues & Buyer’s Checklist
Prospective buyers should approach a Val 31 with the scrutiny required for any GRP vessel nearing its fourth or fifth decade.
- Osmotic Blistering: Like many boats produced in South America during this era, the quality of the resin and gelcoat varied. A thorough hull inspection is necessary to check for signs of hydrolysis or blistering below the waterline.
- Deck Core Integrity: The decks are often sandwich-constructed with balsa or plywood. Soft spots are common around high-load areas like the chainplates and stanchion bases, where water ingress may have compromised the core.
- Rigging and Chainplates: Many Val 31s still carry their original stainless steel chainplates. Given the age, these should be inspected for crevice corrosion, particularly where they pass through the deck.
- Engine Serviceability: These boats were often fitted with older Volvo Penta or Yanmar diesels. Parts availability for specific older models (such as the Volvo MD series) can be a challenge in certain regions.
Community & Resources
The Val 31 enjoys a dedicated following within the Argentinian and Brazilian sailing communities. Technical support and owner discussions are most frequently found through the Club de Veleros Barlovento or the Yacht Club Argentino, where the model maintains a strong historical presence. Because the builder is no longer in operation, owners often rely on the Einar Ohlson design archives for technical drawings and sail plans.
The Verdict
The Val 31 is a stout, aesthetically pleasing classic that offers a high level of seaworthiness for its size. While it lacks the interior volume and "dock appeal" of modern wide-beam cruisers, its sailing pedigree is undeniable.
Pros:
- Strong upwind performance and excellent tracking in heavy weather.
- Robust GRP construction suitable for blue-water coastal hops.
- Classic design aesthetics that remain timeless.
Cons:
- Older IOR hull shapes can be twitchy on downwind runs.
- Aging systems and potential for deck core issues require a careful survey.
- Limited interior volume compared to modern 30-footers.
Measurements
Construction & Hull
- Construction Material
- —
- Hull Type
- Trimaran Sailboat
- Keel Type
- Daggerboard
- Ballast
- -
- Displacement
- 2200 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 31.16 ft
- Waterline Length (LWL)
- 27.83 ft
- Beam
- 25 ft
- Draft
- 6 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 440 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 41.61
- Ballast / Displacement Ratio
- —
- Displacement / Length Ratio (D/L) Ratio
- 45.57
- Comfort Ratio
- 1.62
- Capsize Screening Formula
- 7.69
- Hull Speed
- 7.07 kn