Detailed sailboat specifications and datasheets since 2015
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Nauticat 321 Deep draft

Sailboat specifications

The Nauticat 321 is a 32’10” (10m) motorsailer designed by Siltala Design Office (Finland). She was built between 1999 and 2018 by Nauticat Yachts (Finland) and Siltala Yachts (Finland). The Deep draft version offers a deeper L-shaped keel bringing extra performance especially upwind.

The Nauticat 321 is as well listed, on Boat-Specs.com, in Standard and Shoal draft version (see all the versions compared).

Nauticat 321's main features

Model
Nauticat 321
Version
Deep draft
Hull type
Monohull
Category
Deck saloon motorsailer
Sailboat builder
Sailboat designer
Sailboat range
Country
Finland
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich fiberglass polyester
First built hull
1999
Last built hull
2018
Appendages
Keel : L-shaped keel (with 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
A
Standard public price ex. VAT (indicative only)
About 
198 000 €
 (2017)

Nauticat 321's main dimensions

Hull length
32’ 10”10 m
Waterline length
27’ 2”8.3 m
Beam (width)
10’ 7”3.24 m
Draft
5’ 11”1.8 m
Mast height from DWL
45’ 4”13.8 m
Light displacement (MLC)
13228 lb6000 kg
Ballast weight
3968 lb1800 kg
Ballast type
Lead

Nauticat 321's rig and sails

Upwind sail area
637 ft²59.2 m²
Downwind sail area
1141 ft²106 m²
Mainsail area
280 ft²26 m²
Genoa area
357 ft²33.2 m²
Jib area
203 ft²18.9 m²
Stormjib area
65 ft²6 m²
Symmetric spinnaker area
861 ft²80 m²
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars

Nauticat 321'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.
193 ft²/T17.93 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.
346 ft²/T32.1 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.
297
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.
30 %
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.
6.99 knots

Nauticat 321's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power
39 HP
Fuel type
Diesel
Fuel tank capacity
66 gal250 liters

Nauticat 321's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
2
Berth(s) (min./max.)
4 / 6
Head(s)
1
Freshwater tank capacity
116.2 gal440 liters
Fridge/ice-box capacity
26.4 gal100 liters
Maximum headroom
6’ 2”1.9 m

Nauticat 321's saloon

Maximum headroom
6’ 2”1.9 m

Nauticat 321's fore cabin

Berth length
6’1.83 m
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