The Océanis 400
is a 39’10” (12.12m) cruising sailboat designed by Finot Conq Architectes
(France). She was built between 1991 and 1997 by Bénéteau
(France) with 474 hulls completed. The Deep draft
version offers a deeper L-shaped keel bringing extra performance especially upwind.
The Océanis 400
is as well listed, on Boat-Specs.com, in Shoal draft
version (see all the versions compared
Océanis 400's main features
Hull and deck: GRP (glass reinforced polyester)
Number of hulls built
First built hull
Last built hull
Keel : L-shaped keel (with bulb)
Single helm wheel
Single spade rudder
Former French navigation category
Standard public price ex. VAT (indicative only)
Océanis 400's main dimensions
39’ 10”12.12 m
34’ 11”10.64 m
12’ 10”3.91 m
5’ 6”1.68 m
Mast height from DWL
Light displacement (MLC)
16001 lb7258 kg
5600 lb2540 kg
Océanis 400's rig and sails
Upwind sail area
883 ft²82 m²
377 ft²35 m²
506 ft²47 m²
I iFore triangle height (from mast foot to fore stay top attachment)
48’ 2”14.7 m
J iFore triangle base (from mast foot to bottom of forestay)
13’ 6”4.11 m
P iMainsail hoist measurement (from tack to head)
42’ 4”12.89 m
E iMainsail foot measurement (from tack to clew)
15’ 8”4.79 m
Sloop Marconi masthead
Deck stepped mast
Number of levels of spreaders
1x19 strand wire discontinuous
Océanis 400'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.
235 ft²/T21.87 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.
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.
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.
Océanis 400's auxiliary engine
1 inboard engine
Fuel tank capacity
39.6 gal150 liters
Océanis 400's accommodations and layout
Closed aft cockpit
2 / 3
4 / 8
Freshwater tank capacity
140 gal530 liters
6’ 5”1.95 m
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