Design and Construction
Zaal's hull measures 9.5 metres overall on a 7.76-metre waterline, with a beam of 3.14 metres and a displacement of 5.0 tonnes. The keel is not a single laminated-and-ballasted unit but a fin bolted to the hull with keel bolts, and the boat was built in solid fiberglass laminate — a heavy construction that YACHT credited as very solid but noted provides little insulation. Ballast runs to 2.5 tonnes, fully half the displacement, which the same review called effective and composure-giving. Two draught variants exist, 1.45 and 1.75 metres, the deeper version particularly noted for its composure, and a cruising version with shallow keel was also offered alongside the standard IOR half-tonner rating sold as an IOR cruiser-racer, rating as a half-tonner.
The deck and structural details reveal period Dutch practice. The mast base was laminated over from the outside and sits on a thick wooden plate, with the mast-base screws driven into that wood. Railing feet are screwed into wooden panels laminated under the deck with wood screws, and the genoa rails are bolted through and laminated over from the inside. The rudder is skeg-hung — and that skeg is the one structural weak point, as a crack can develop where the skeg meets the hull, requiring lamination repair.
Rig and Handling
The 31 HT is masthead-rigged, carrying an 18.2-square-metre mainsail and a 106% furling genoa of 37.5 square metres on a mast 13.5 metres above the waterline. YACHT praised a wide traveller and generous fittings, and the steering drew consistent admiration: very easy and direct, with amazingly direct control. That precision comes with a caveat — the narrow stern gets pushed about by following waves and the boat tends to fiddle, demanding careful helmsmanship even as the response remains immediate. A tiller version was available, which the reviewer found easier to manage than wheel steering.
Accommodations
Below, the boat offers a fully-fitted and well-built interior with five or six berths, including a quarterberth and a midships heads. The AK variant substitutes two single aft berths. Berth length reaches 188 centimetres at its best, yet YACHT flagged the berth dimensions overall as very tight — a real constraint for larger adults on a longer passage. Tankage is generous for the size: 100 litres of diesel and 230 litres of fresh water, though no holding tank was fitted. The deep, well-protected cockpit shelters the crew, though the cockpit bilge pump is small.
Known Issues
Beyond the skeg crack already noted, the original hatches usually leak and the windows also leak — both are routine owner attention items rather than structural faults. The heavy solid laminate hull gives little insulation, a comfort consideration in colder climates. None of these flaws undermines the essential solidity, but a survey should specifically examine the skeg-to-hull joint, hatch seals, and window frames.
The Verdict
The Contest 31 HT is a period piece that wears its IOR lineage lightly. She rewards an attentive helm with direct, confident steering and carries enough ballast to stay composed in a seaway, wrapped in genuinely solid Dutch construction. Tight berths and leak-prone original openings are the price of her compact 1970s footprint, but for a couple or small family seeking a seaworthy classic of defined character, she remains a reasoned choice.
Pros
- Very solid solid-laminate construction with 50% ballast ratio for composure
- Direct, easy steering with wide traveller and generous deck fittings
- Generous 100 L fuel and 230 L water tankage for the size
- Proven seaworthy family cruiser with 252 built and strong lineage
Cons
- Skeg can crack at hull transition and needs lamination repair
- Original hatches and windows typically leak
- Very tight berth dimensions despite 188 cm max length
- Heavy hull provides little insulation; small cockpit bilge pump







