Detailed sailboat specifications and datasheets since 2015
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Nauticat 331 Shoal draft

Sailboat specifications

The Nauticat 331 is a 34’1” (10.4m) cruising sailboat designed by Siltala Design Office (Finland) and Wilho Aarnipalo (Finland). She was built between 1999 and 2018 by Nauticat Yachts (Finland) and Siltala Yachts (Finland). The Shoal draft version features a shorter keel to grant access to shallow areas.

The Nauticat 331 is as well listed, on Boat-Specs.com, in Deep draft version (see all the versions compared).

Nauticat 331's main features

Model
Nauticat 331
Version
Shoal draft
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
Country
Finland
Construction
GRP (glass reinforced polyester):
Single skin fiberglass polyester
First built hull
1999
Last built hull
2018
Appendages
Keel : fin without bulb
Helm
Twin helm wheels
Rudder
Single semi-spade rudder
Unsinkable
No
Trailerable
No
EC design category
 iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5m
B
Standard public price ex. VAT (indicative only)
About 
235 000
 (2017)

Nauticat 331's main dimensions

Hull length
34’ 1”10.4 m
Waterline length
28’ 2”8.6 m
Beam (width)
11’ 2”3.4 m
Draft
4’ 11”1.48 m
Mast height from DWL
45’ 11”14 m
Fore freeboard
4’ 11”1.5 m
Mid-ship freeboard
4’ 7”1.4 m
Light displacement (MLC)
18298 lb8300 kg
Ballast weight
5291 lb2400 kg

Nauticat 331's rig and sails

Upwind sail area
663 ft²61.6 m²
Downwind sail area
998 ft²92.7 m²
Mainsail area
234 ft²21.7 m²
Mizzen sail area
97 ft²9 m²
Genoa area
333 ft²30.9 m²
Solent area
237 ft²22 m²
Jib area
105 ft²9.8 m²
Stormjib area
84 ft²7.8 m²
Symmetric spinnaker area
667 ft²62 m²
Rigging type
Ketch Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
0 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Nauticat 331's performances

Upwind sail area to displacement
 iThe 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 25 it indicates a fast sailboat.
162 ft²/T15.03 m²/T
Downwind sail area to displacement
 iThe 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.
243 ft²/T22.61 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The 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 ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
29 %
Critical hull speed
 iAs 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 inboard engine
Engine(s) power
75 HP
Fuel type
Diesel
Fuel tank capacity
118.9 gal450 liters

Nauticat 331's accommodations and layout

Cockpit
Raised aft cockpit
Cabin(s)
2
Berth(s) (min./max.)
4 / 6
Freshwater tank capacity
118.9 gal450 liters
Holding tank capacity
21.1 gal80 liters
Fridge/ice-box capacity
26.4 gal100 liters

Nauticat 331's saloon

Maximum headroom
5’ 11”1.8 m

Nauticat 331's fore cabin

Maximum headroom
5’ 8”1.75 m

Nauticat 331's aft cabin

Maximum headroom
5’ 8”1.75 m
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