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Nauticat 321 Shoal draft is a Deck saloon motorsailer built by Nauticat Yachts and designed by Siltala Design Office. Her first hull was built in 1999 and a Deck stepped mast mast configuration.

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NAUTICAT 321 SHOAL DRAFT Sailboat Specifications​


Overall Length (LOA) m / ft10.00 m / 32.81 ft
Builder(s)Nauticat Yachts
Designer(s)Siltala Design Office
VersionShoal draft
categoryDeck saloon motorsailer
Hull TypeMonohull
First Hull Built1999
Last Hull Built2018
AppendagesKeel L-shaped keel (with bulb)
HelmTwin helm wheels
RudderSingle semi-spade rudder
CockpitClosed aft cockpit
Ballast TypeLead
Rigging TypeSloop Marconi masthead
Mast LayoutDeck stepped mast
Number of Cabin(s)2
Number of Head(s)1
Freshwater Tank Capacity lt/gal440 L / 116.2 gal
Ballast Ratio0.34


Overall Length (LOA) 10.00 m / 32.81 ft
Hull Length10 m / 32.10 ft
Waterline Length (LWL)8.3 m / 27.2 ft
Beam (width)3.24 m / 10.7 ft
Draft1.45 m / 4.10 ft
Light Displacement (MLC) 6350 kg / 13999 lb
Maximum Displacement6000 kg / 13228 lb
Ballast Weight2150 kg / 4740 lb


Critical Hull Speed6.99 knots
Capsize Screening Formula (CSF)1.80
Comfort Ratio30.36
Displacement-Length Ratio (DLR)314
Ballast Ratio0.34
Sail Area to Displacement16.53
Upwind Sail Area to Displacement15.6 m²/T / 168 ft²/T
Downwind Sail Area to Displacement29.83 m²/T / 321 ft²/T

Above Deck

Mast LayoutDeck stepped mast
Mast Height from DWL13.8 m / 45.4 ft
Rotating SparsNo
Number of Levels of Spreaders2
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Reported Sail Area53.50 m² / 575.87 ft²
Upwind Sail Area53.5 m² / 576 ft²
Downwind Sail Area102.3 m² / 1101 ft²
Mainsail Area22.3 m² / 240 ft²
Genoa Area31.2 m² / 336 ft²

Engine Room

Engine(s)1 inboard engine
Engine(s) Power39 HP
Fuel typeDiesel
Fuel Tank Capacity250 L / 66 gal

Below Deck

Fridge Capacity100 L / 26.4 gal
Maximum Headroom6.2 ft * 1.9 m