Chatam 37 Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the Chatam 37 are defined by its heavy displacement and hull form. As a hard-chine vessel, the boat exhibits a stiff motion; it resists initial heeling and finds its "groove" quickly when the wind picks up. While it is not a light-air performer due to its substantial wetted surface area and weight (often exceeding 8 tons in steel), it excels in heavy weather. Most Chatam 37s were rigged as cutters, a configuration that allows for easy sail plan reduction while maintaining a balanced center of effort.

A critical aspect of the Chatam 37's handling is its keel configuration. The model was offered as both a fixed-fin keel and a dériveur intégral (integral centerboarder). The centerboard version is particularly prized for expedition sailing, as it allows the boat to dry out on its hull and enter shallow anchorages that are inaccessible to most 37-footers. However, owners frequently note that the centerboard version requires more attention to sail trim to prevent leeway when sailing upwind. Technical reviews by French nautical journals such as Voiles et Voiliers have historically praised the design's "sea-kindliness," noting that its volume and chine design help it track well in a following sea, a vital trait for long-distance tradewind passages.

Interior Comfort & Variations

The interior of the Chatam 37 is notoriously spacious for its length, a direct result of the high freeboard and wide beam carried well aft. Because many were sold as plans or kits for amateur completion, the interior layouts can vary significantly. However, a "standard" configuration typically includes a large U-shaped galley, a dedicated navigation station, and two or three cabins. The use of hard chines creates a unique interior geometry, often allowing for deep storage lockers and water tanks to be placed low in the hull, contributing to the vessel’s stability.

Headroom is a standout feature, often exceeding 1.9 meters (approx. 6'3") throughout the main saloon. For high-latitude versions, the interior is usually heavily insulated—a necessity for steel and aluminum hulls to prevent condensation. The Chatam 37 is part of a broader family of hulls designed by Caroff, including the smaller Chatam 33 and the larger Chatam 40, 43, and 47. The Chatam 40, in particular, is essentially a lengthened version of the 37, offering a larger aft cockpit or an additional technical room. The "Chatam Extrême" variants featured more modern, slightly more aerodynamic coachroofs, but retained the same dependable hull lines of the original 37.

Known Issues & Buyer’s Checklist

When inspecting a Chatam 37, the primary concern is the material and quality of the build. Because these are often owner-built, the quality of the welding and the electrical isolation varies wildly.

• Corrosion and Electrolysis: For steel hulls, buyers must check for "bloom" rust under the paint, especially in the bilges and around the chainplates. For aluminum hulls, a thorough check for galvanic corrosion is mandatory, particularly near the engine mounts and through-hull fittings.
• Insulation Quality: Improperly installed insulation can lead to "sweating" against the hull, which promotes hidden corrosion. A buyer should pull back panels in the lockers to inspect the interface between the insulation and the metal skin.
• Centerboard Mechanism: If the vessel is a lifting-keel version, the centerboard trunk, pivot pin, and lifting cables are high-wear items. The board should be operated during a survey to ensure it does not "clunk" or bind, which could indicate a warped board or worn bushings.
• Ballast Integrity: In many Chatam designs, lead or scrap iron ballast was encapsulated in the keel or hull sections. It is vital to ensure that no water has penetrated these compartments, as it can cause internal rust that is nearly impossible to treat without cutting the hull open.

Community & Resources

The Chatam 37 enjoys a dedicated following among long-distance cruisers, particularly in Europe. The Caroff-Duflos Design Office remains the primary technical resource for original plans and stability data. While there is no single "English-speaking" owner association, the "Association des Propriétaires de Plans Caroff" (Association of Caroff Plan Owners) has historically served as a hub for technical exchange regarding welding schedules, rigging modifications, and interior refits for the Chatam series.

The Verdict

The Chatam 37 is a purposeful tool designed for sailors who value security and longevity over speed and dockside glitz. It is a "forever boat" for those intending to cross oceans or explore remote coastlines.

Pros:

• Extreme Durability: Steel or aluminum construction offers superior impact resistance compared to fiberglass.
• Versatility: The integral centerboard version allows for shallow-water exploration and beaching.
• Living Volume: Exceptional interior space and storage for a 37-foot vessel.
• Customization: Many interior layouts are uniquely tailored for blue-water living.

Cons:

• Maintenance Intensity: Metal hulls require diligent paint schedule maintenance and cathodic protection.
• Heavy Displacement: Sluggish performance in light winds; often requires motoring in calms.
• Build Variance: Amateur-built examples require rigorous surveying to ensure structural and electrical standards.