Detailed sailboat specifications and datasheets since 2015
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Océanis 381 (Classic)

Main featuresOcéanis 381 Classic
Model
Océanis 381
Version
Classic
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Bénéteau
Sailboat designer
Sailboat range
Country
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built
About 300
First built hull
1996
Last built hull
2000
Appendages
Keel : L-shaped keel (with bulb)
Helm
Single helm wheel
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
Former French navigation category
1
 
Main dimensionsOcéanis 381 Classic
Overall length
38’ 6”11.75 m
Hull length
37’ 8”11.5 m
Waterline length
32’ 10”10 m
Beam (width)
12’ 11”3.93 m
Draft
5’ 4”1.62 m
Light displacement (MLC)
14991 lb6800 kg
Ballast weight
4740 lb2150 kg
French customs tonnage
15.30 Tx
 
Rig and sailsOcéanis 381 Classic
Upwind sail area
750 ft²69.7 m²
Downwind sail area
1199 ft²111.35 m²
Mainsail area
337 ft²31.35 m²
Genoa area
413 ft²38.35 m²
Symmetric spinnaker area
861 ft²80 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
45’ 5”13.85 m
J
 iFore triangle base (from mast foot to bottom of forestay)
13’3.96 m
P
 iMainsail hoist measurement (from tack to head)
38’ 6”11.74 m
E
 iMainsail foot measurement (from tack to clew)
15’ 1”4.6 m
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
Standing rigging
1x19 strand wire
 
PerformancesOcéanis 381 Classic
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.
209 ft²/T19.42 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.
334 ft²/T31.02 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.
193
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.
32 %
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.
7.68 knots
 
Auxiliary engineOcéanis 381 Classic
Engine(s)
1 inboard engine
Engine(s) power (min./max.)
30 HP / 42 HP
Fuel type
Diesel
Fuel tank capacity
39.6 gal150 liters
 
Accommodations and layoutOcéanis 381 Classic
Cockpit
Closing aft cockpit with opening system
Cabin(s) (min./max.)
2 / 3
Berth(s) (min./max.)
6 / 8
Head(s) (min./max.)
1 / 2
Freshwater tank capacity
126.8 gal480 liters
Maximum headroom
6’ 7”2.01 m
 
SaloonOcéanis 381 Classic
Maximum headroom
6’ 6”1.98 m
 
Fore cabinOcéanis 381 Classic
Berth length
6’ 7”2 m
Berth width (head/feet)
5’ 11”1.8 m / 4’ 11”1.5 m
 
Aft cabinOcéanis 381 Classic
Berth length
6’ 7”2 m
Berth width
4’ 1”1.24 m
 
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