Detailed sailboat specifications and datasheets since 2015
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Océanis 51.1 Deep draft

Sailboat specifications

The Océanis 51.1 is a 49’1” (14.98m) cruising sailboat designed by Berret Racoupeau Yachts Design (France). She is built since 2017 by Bénéteau (France). The Deep draft version offers a deeper L-shaped keel bringing extra performance especially upwind.

The Océanis 51.1 is as well listed, on Boat-Specs.com, in Shoal draft and Performance version (see all the versions compared).

Find out more about the Océanis 51.1 on Boat-Spec's blog: European Yacht of the Year 2018.

Océanis 51.1's main features

Model
Océanis 51.1
Version
Deep draft
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
Country
France
Construction
GRP (glass reinforced polyester):
- Hull: Sandwich balsa fiberglass polyester (vacuum infusion)
- Deck: Sandwich foam fiberglass polyester (injection molding process)
First built hull
2017
Last built hull
Still in production
Appendages
Keel : L-shaped keel (with bulb)
Helm
Twin helm wheels
Rudder
Twin spade rudders
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 
291 000
 (2020)

Océanis 51.1's main dimensions

Overall length
50’ 7”15.43 m
Hull length
49’ 1”14.98 m
Waterline length
47’ 7”14.52 m
Beam (width)
15’ 8”4.8 m
Draft
7’ 8”2.36 m
Mast height from DWL
70’ 2”21.4 m
Light displacement (MLC)
30710 lb13930 kg
Ballast weight
7487 lb3396 kg
Ballast type
Cast iron

Océanis 51.1's rig and sails

Upwind sail area
1313 ft²122 m²
Downwind sail area
2551 ft²237 m²
Mainsail area
614 ft²57 m²
Genoa area
700 ft²65 m²
Asymmetric spinnaker area
1938 ft²180 m²
Code 0 area
1485 ft²138 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
60’ 1”18.32 m
J
 iFore triangle base (from mast foot to bottom of forestay)
20’ 8”6.3 m
P
 iMainsail hoist measurement (from tack to head)
57’ 8”17.58 m
E
 iMainsail foot measurement (from tack to clew)
18’5.5 m
Rigging type
Sloop Marconi 9/10
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars (carbon fiber spars as an option)
Standing rigging
1x19 strand wire

Océanis 51.1'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.
227 ft²/T21.07 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.
441 ft²/T40.94 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.
129
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.
24 %
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.
9.25 knots

Océanis 51.1's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power (min./max.)
80 HP / 110 HP
Fuel type
Diesel
Fuel tank capacity
52.8 gal200 liters

Océanis 51.1's accommodations and layout

Cockpit
Open aft cockpit
Cabin(s) (min./max.)
3 / 5
Berth(s) (min./max.)
6 / 12
Head(s) (min./max.)
2 / 4
Freshwater tank capacity
116.2 gal440 liters
Holding tank capacity
42.3 gal160 liters
Fridge/ice-box capacity
60.8 gal230 liters
Boiler capacity
10.6 gal40 liters
Galley headroom
6’ 5”1.94 m
Head headroom
6’ 1”1.85 m

Océanis 51.1's saloon

Maximum headroom
6’ 8”2.03 m

Océanis 51.1's fore cabin

Maximum headroom
6’ 5”1.95 m
Berth length
6’ 8”2.05 m
Berth width (head/feet)
5’ 2”1.6 m / 4’1.23 m

Océanis 51.1's aft cabin

Maximum headroom
6’ 6”1.97 m
Berth length
6’ 11”2.1 m
Berth width
5’ 2”1.6 m
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