Detailed sailboat specifications and datasheets since 2015
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Océanis 320 Fin keel

Sailboat specifications

The Océanis 320 is a 30’4” (9.25m) cruising sailboat designed by Philippe Briand (France). She was built between 1987 and 1992 by Bénéteau (France) with 359 hulls completed. The Fin keel version adopts a classical fin configuration, the easiest option to provide a low center of gravity.

The Océanis 320 is as well listed, on Boat-Specs.com, in Wing keel version (see all the versions compared).

Océanis 320's main features

Model
Océanis 320
Version
Fin keel
Hull type
Monohull
Category
Cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
Country
France
Construction
GRP (glass reinforced polyester):
Single skin fiberglass polyester
Number of hulls built
359
First built hull
1987
Last built hull
1992
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
Former French navigation category
2
Standard public price ex. VAT (indicative only)
N/A

Océanis 320's main dimensions

Overall length
31’ 6”9.6 m
Hull length
30’ 4”9.25 m
Waterline length
27’ 8”8.44 m
Beam (width)
10’ 8”3.26 m
Draft
4’ 7”1.4 m
Mast height from DWL
44’ 11”13.7 m
Light displacement (MLC)
8818 lb4000 kg
Ballast weight
2646 lb1200 kg
Ballast type
Cast iron
French customs tonnage
11.00 Tx

Océanis 320's rig and sails

Upwind sail area
544 ft²50.5 m²
Downwind sail area
958 ft²89 m²
Mainsail area
199 ft²18.5 m²
Genoa area
344 ft²32 m²
Stormjib area
62 ft²5.75 m²
Symmetric spinnaker area
759 ft²70.5 m²
Rigging type
Sloop 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

Océanis 320's performances

HN (French rating)
 iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.
16.0
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.
216 ft²/T20.04 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.
380 ft²/T35.32 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.
188
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.
7.05 knots

Océanis 320's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power
18 HP
Fuel type
Diesel
Fuel tank capacity
13.2 gal50 liters

Océanis 320's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
2
Berth(s) (min./max.)
4 / 6
Head(s)
1
Freshwater tank capacity
39.6 gal150 liters
Fridge/ice-box capacity
19.8 gal75 liters
Maximum headroom
6’ 4”1.92 m
Galley headroom
5’ 10”1.78 m
Head headroom
5’ 10”1.78 m

Océanis 320's saloon

Maximum headroom
6’ 1”1.85 m
Saloon table length
3’ 8”1.12 m
Saloon table width
2’ 2”0.68 m
Saloon width
3’ 4”1 m
Berth length
7’ 5”2.26 m
Berth width
3’ 4”1 m

Océanis 320's fore cabin

Maximum headroom
5’ 8”1.75 m
Berth length
7’ 6”2.3 m
Berth width
6’ 2”1.9 m

Océanis 320's aft cabin

Maximum headroom
5’ 10”1.78 m
Berth length
6’ 5”1.95 m
Berth width
5’ 1”1.55 m
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