Design and Construction
At 51 feet on deck, the Nauticat 52 is a large motorsailer built by Siltala Yachts Oy, the Finnish builder behind the well-regarded Nauticat line. Both the hull and deck are fibreglass, a choice that keeps seasonal maintenance demands manageable on a boat of this size. The hull carries significant displacement — firmly in the ultra-heavy cruiser category — which is a deliberate design stance rather than an oversight. That mass, combined with a relatively wide beam for its class, produces a boat whose Motion Comfort Ratio sits well above the field of comparable sailboat designs, a figure that speaks directly to how the boat behaves in a seaway rather than how fast it goes through one.
Keel and Stability
The fin keel is constructed of iron rather than lead. The iron keel draws roughly 2.20 to 2.30 meters depending on load, which narrows the harbors and anchorages available but is a reasonable trade for the keel depth a boat of this displacement benefits from. The ballast ratio sits at 31 percent, which in context of an ultra-heavy hull is less a concern than the raw numbers might suggest — the sheer mass of the displacement contributes to a measured, pendulum-like motion rather than a snappy response. The capsize screening value of 1.61 would pass ocean-race screening criteria, a useful benchmark for offshore passage-making.
Rig and Handling
The Nauticat 52 carries a ketch rig, which is the natural complement to a boat of this type and weight. The split rig distributes sail area across two masts, keeping individual sail sizes manageable for short-handed crews. A ketch's ability to sail on most points of sail with one mast's canvas furled or stowed is a genuine practical advantage on long passages where a torn headsail or a reefing operation in deteriorating conditions demands flexibility. Running downwind or on a broad reach, the ketch configuration delivers better comfort and stability than a comparable single-stick arrangement, allowing mizzen staysails and other downwind combinations.
Engine and Fuel Capacity
The motorsailer designation is more than a marketing label here. The 52 is equipped with an inboard Ford engine producing 121 horsepower, transmitted via shaft drive rather than saildrive — a choice that reduces long-run maintenance complexity. The fuel tankage is substantial at 2,000 liters, sized to match the boat's motoring range ambitions. Theoretical maximum hull speed from the waterline length calculates to 8.4 knots, and the engine pushes the boat to a claimed 10 knots under power — meaning motoring capacity meaningfully exceeds sailing hull speed, which is precisely the motorsailer tradeoff.
Accommodations
Below, the Nauticat 52 offers 8 to 10 berths along with a galley and toilet facilities. The interior is finished in teak, which was the expected material at the time of construction and continues to give the boat a warm, traditional character. Fresh water tankage matches the fuel capacity at 2,000 liters, reflecting the extended passagemaking role the boat was designed around. The immersion rate of approximately 372 kilograms per centimeter — the weight needed to sink the hull one centimeter — gives a sense of just how much the Nauticat 52 can absorb in provisioning and equipment without significantly altering trim.
The Verdict
The Nauticat 52 is an honest boat: heavy, capable, and designed without apology for long-range cruising where comfort under way matters more than racing performance. The Sparkman & Stephens pedigree ensures the hull is competently drawn, and Finnish construction quality has historically been a reliable constant across the Nauticat range. For a crew willing to embrace the motorsailer philosophy — understanding that progress is sometimes made under engine, that comfort ratios matter more than displacement-length ratios, and that 8 to 10 berths are meant to be used across an ocean — the 52 makes a persuasive case.
Pros
- Motion comfort ratio ranks well above comparable bluewater sailboats
- Ketch rig keeps individual sail panels manageable for short-handed offshore passages
- Massive fuel and water tankage supports extended ocean passages with minimal provisioning stops
- Shaft-drive transmission simplifies long-term drivetrain maintenance
- Fibreglass construction throughout minimizes seasonal upkeep burden
Cons
- Iron rather than lead ballast is a minority choice that some buyers will want to inspect carefully for corrosion
- Draft of over 2.2 meters restricts access to shallow anchorages and smaller harbors
- Ultra-heavy displacement means sailing performance in light airs will be limited
- Ballast ratio of 31 percent is on the lower end for offshore designs of this type
