BoatsNauticat 331

Nauticat 331

Masthead Ketch · Fin With Rudder On Skeg · First built 1997

A sturdy masthead ketch designed for comfortable cruising with a skeg-mounted rudder and a stable, heavy displacement

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin With Rudder On Skeg

See her sail

The Nauticat 331, on the water

The fleet's own footage — the truest look at how she really moves.

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her heavy displacement on a moderate beam gives 39 — a sea-kindly motion in a seaway.

Comfort ratio 39
CoastalBluewater

At 1.68 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.68
LightHeavy

373 — very heavy for her waterline, a serious load-carrying cruiser.

Displacement / length 373
EasygoingPowered-up

13.9 — modest power for her weight; easygoing rather than lively, and happier with a breeze.

Sail area / displacement 13.9
TenderStiff

28% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 28%

Built heavy and sea-kindly — a boat made to cross oceans and forgive a rough night.

  • Heavier than ~93% of boats her size on file

Compared with 2902 boats of the same type within a quarter of her length.

What the fleet has seen

The Nauticat 331, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Nauticat 331 is a 33-foot Finnish-built masthead ketch motorsailer, produced by Siltala Yachts since 1997. It features a fin keel with a skeg-hung rudder, measures 10.1 meters LOA with a 3.4-meter beam, and displaces 8499 kg. The boat has a deep draft of 1.5 meters. Aboard a Nauticat 331, Halcyon Yachts observed stability and balance in 20-knot winds during an eight-day passage from Cardiff to Dartmouth.2:06 The vessel is powered by a 70-horsepower engine, consuming two to three liters of fuel per hour at 1,800 RPM from its 500-liter tank.3:31 Its design includes a raised pilothouse with dual helm stations, allowing navigation from either the cockpit or the interior.4:06 The interior features a saloon, a galley with a microwave and fridge, and two double cabins, one with an ensuite head.5:44 Construction emphasizes solid woodwork and teak-topped handrails, with accessible systems and ample storage.7:39

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
28.3%
Rig & sail area
Rig
Masthead Ketch
Ratios
SA / displacement
13.9
Displacement / length
372.6
Comfort ratio
39.3
Capsize screening
1.68
Hull speed
7.1 kn
Pounds / inch immersion
1124
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Years built
First built 1997
Builder
Siltala Yachts, Nauticat - Siltala Yachts

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Westerly Yachts Ltd. Discus 3310.14 mSame hull familyNear-identical lengthAn aft-cockpit evolution of the Westerly 33, featuring a masthead rig and the choice of fin or twin keels
Mistral 3310.19 mSame hull familyNear-identical lengthA former IOR half-tonner that transitioned from the Hallberg brand to the Hallberg-Rassy line during its 1968-1976 run
Westerly 3310.14 mSame hull familyNear-identical lengthA center-cockpit masthead sloop offered with fin or bilge keels, designed for stable cruising and long-range comfort
Catalina Yachts 31610.06 mSame hull familyNear-identical lengthA 2024 6 Series fractional sloop featuring a deep-draft fin keel and spade rudder for precise coastal handling
Endeavour 3310.06 mSame hull familyNear-identical lengthA shoal-draft masthead sloop with a fin keel and spade rudder, designed by Bruce Kelley for coastal cruising
Moody 3410.19 mSame hull familyNear-identical lengthA 1980s mid-sized cruiser with a 40% ballast ratio, designed for stability and predictable handling in coastal waters

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

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The fleet has more to say

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