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Sailboat specifications and datasheets

Nauticat 331 shoal draft

The Nauticat 331, here in "shoal draft" version, is a 34’1” monohull sailboat designed by Design Office Siltala and Wilho Aarnipalo. She was built by Nauticat Yachts (Finland) and made of monolithic fiberglass / polyester. The production started in 1999 .

The Nauticat 331 belongs to the Nauticat range. The Nauticat 331 is as well listed, on Boat-Specs.com, in version Deep draft.

Nauticat Yachts Nauticat 331 Nauticat Yachts Nauticat 331 sailplanNauticat Yachts Nauticat 331 layoutNauticat Yachts Nauticat 331 layoutNauticat Yachts Nauticat 331 accommodationsNauticat Yachts Nauticat 331 accommodations
Nauticat 331's   Main Features
Model Nauticat 331
Version Shoal draft
Type of hull Monohull
Category Offshore cruising sailboat
Shipyard
Designer Design Office Siltala
Wilho Aarnipalo
Range Nauticat
Construction Hull and deck:
monolithic fiberglass / polyester
First built hull 1999
Last built hull Still in production
Appendages Keel :
Fin without bulb
Helm 2 wheels
Rudder 1 semi-spade rudder
Cockpit Raised aft cockpit
Unsinkable No
Trailerable No
EC certification B
Standard public price ex. VAT (indicative only) About
235 000
(2017)
Nauticat 331's   Main dimensions
Hull length 34’ 1”
Waterline length 28’ 2”
Beam (width) 11’ 2”
Draft 4’ 11”
Mast height from DWL 45’ 11”
Fore freeboard 4’ 11”
Mid-ship freeboard 4’ 7”
Light displacement 18298 lbs
Ballast weight 5291 lbs
Nauticat 331's   Rig and sails
Upwind sail area 663 sq.ft
Downwind sail area 998 sq.ft
Mainsail area 234 sq.ft
Mizzen sail area 97 sq.ft
Genoa area 333 sq.ft
Solent area 237 sq.ft
Jib area 105 sq.ft
Stormjib area 84 sq.ft
Symetric spinnaker area 667 sq.ft
Rigging type Ketch Marconi masthead
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle 0 °
Nauticat 331's   Performances
Upwind sail area to displacementiThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind : under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 23 it indicates a fast sailboat.
15.03
Downwind sail area to displacementiThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind : under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 23 it indicates a fast sailboat.
22.61
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length: a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
370
Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
29 %
Hull speediAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
7.12 knots
Nauticat 331's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 75 HP
Fuel type Diesel
Fuel tank capacity 118.9 gal
Nauticat 331's   Accommodation
Cabin(s) 2
Berth(s) (min/max) 4 / 6
Fresh water tank capacity 118.9 gal
Holding tank capacity 21.1 gal
Fridge/ice-box capacity 26.4 gal
Nauticat 331's   Saloon
Maximum headroom 5’ 11”
Nauticat 331's   Fore cabin
Maximum headroom 5’ 8”
Nauticat 331's   Aft cabin
Maximum headroom 5’ 8”

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