| Main features | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Model | Nauticat 331 | Nauticat 331 |
Version | Shoal draft | Deep draft |
Hull type | Monohull | Monohull |
Category | Offshore cruising sailboat | Offshore cruising sailboat |
Sailboat builder | Nauticat Yachts & Siltala Yachts | Nauticat Yachts & Siltala Yachts |
Sailboat designer | ||
Sailboat range | ||
Country | Finland | Finland |
Construction | GRP (glass reinforced polyester): Single skin fiberglass polyester | GRP (glass reinforced polyester): Single skin fiberglass polyester |
First built hull | 1999 | 1999 |
Last built hull | 2018 | 2018 |
Appendages | Keel : fin without bulb | Keel : fin without bulb |
Helm | Twin helm wheels | Twin helm wheels |
Rudder | Single semi-spade rudder | Single semi-spade rudder |
Unsinkable | No | No |
Trailerable | No | 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 | B |
Standard public price ex. VAT (indicative only) | 281686 2017 | 281686 2017 |
| Main dimensions | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Hull length | 34’ 1”10.4 m | 34’ 1”10.4 m |
Waterline length | 28’ 2”8.6 m | 28’ 2”8.6 m |
Beam (width) | 11’ 2”3.4 m | 11’ 2”3.4 m |
Draft | 4’ 11”1.48 m | 5’ 2”1.6 m |
Mast height from DWL | 45’ 11”14 m | 45’ 11”14 m |
Fore freeboard | 4’ 11”1.5 m | 4’ 11”1.5 m |
Mid-ship freeboard | 4’ 7”1.4 m | 4’ 7”1.4 m |
Light displacement (MLC) | 18298 lb8300 kg | 18298 lb8300 kg |
Ballast weight | 5291 lb2400 kg | 5291 lb2400 kg |
| Rig and sails | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Upwind sail area | 663 ft²61.6 m² | 663 ft²61.6 m² |
Downwind sail area | 998 ft²92.7 m² | 998 ft²92.7 m² |
Mainsail area | 234 ft²21.7 m² | 234 ft²21.7 m² |
Mizzen sail area | 97 ft²9 m² | 97 ft²9 m² |
Genoa area | 333 ft²30.9 m² | 333 ft²30.9 m² |
Solent area | 237 ft²22 m² | 237 ft²22 m² |
Jib area | 105 ft²9.8 m² | 105 ft²9.8 m² |
Stormjib area | 84 ft²7.8 m² | 84 ft²7.8 m² |
Symmetric spinnaker area | 667 ft²62 m² | 667 ft²62 m² |
Rigging type | Ketch Marconi masthead | Ketch Marconi masthead |
Mast configuration | Deck stepped mast | Deck stepped mast |
Rotating spars | No | No |
Number of levels of spreaders | 1 | 1 |
Spreaders angle | 0 ° | 0 ° |
Spars construction | Aluminum spars | Aluminum spars |
Standing rigging | 1x19 strand wire continuous | 1x19 strand wire continuous |
| Performances | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
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 | 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 | 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 | 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 % | 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 | 7.12 knots |
| Auxiliary engine | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Engine(s) | 1 inboard engine | 1 inboard engine |
Engine(s) power | 75 HP | 75 HP |
Fuel type | Diesel | Diesel |
Fuel tank capacity | 118.9 gal450 liters | 118.9 gal450 liters |
| Accommodations and layout | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Cockpit | Raised aft cockpit | Raised aft cockpit |
Cabin(s) | 2 | 2 |
Berth(s) (min./max.) | 4 / 6 | 4 / 6 |
Freshwater tank capacity | 118.9 gal450 liters | 118.9 gal450 liters |
Holding tank capacity | 21.1 gal80 liters | 21.1 gal80 liters |
Fridge/ice-box capacity | 26.4 gal100 liters | 26.4 gal100 liters |
| Saloon | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Maximum headroom | 5’ 11”1.8 m | 5’ 11”1.8 m |
| Fore cabin | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Maximum headroom | 5’ 8”1.75 m | 5’ 8”1.75 m |
| Aft cabin | Nauticat 331 Shoal draft | Nauticat 331 Deep draft |
Maximum headroom | 5’ 8”1.75 m | 5’ 8”1.75 m |