Detailed sailboat specifications and datasheets since 2015
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Océanis 311 (Fin keel) vs Océanis 311 (Keel and centerboard)

Main featuresOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Model
Océanis 311
Océanis 311
Version
Fin keel
Keel and centerboard
Hull type
Monohull
Monohull
Category
Cruising sailboat
Cruising sailboat
Sailboat builder
Bénéteau
Bénéteau
Sailboat designer
Sailboat range
Country
France
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built
1042
1042
First built hull
1997
1997
Last built hull
2003
2003
Appendages
Keel : L-shaped keel (with bulb)
Centerboard : pivoting centerboard in the keel
Helm
Single helm wheel
Single helm wheel
Rudder
Single spade rudder
Twin spade rudders
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
 
Main dimensionsOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Overall length
32’ 4”9.85 m
32’ 4”9.85 m
Hull length
31’ 2”9.5 m
31’ 2”9.5 m
Waterline length
28’ 11”8.8 m
28’ 11”8.8 m
Beam (width)
10’ 7”3.23 m
10’ 7”3.23 m
Draft
4’ 10”1.45 m
6’ 7”2 m
Draft when appendages up
2’ 7”0.8 m
Light displacement (MLC)
8047 lb3650 kg
8708 lb3950 kg
Ballast weight
2425 lb1100 kg
3086 lb1400 kg
Ballast type
Cast iron
Cast iron
French customs tonnage
9.30 Tx
9.30 Tx
 
Rig and sailsOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Upwind sail area
538 ft²50 m²
538 ft²50 m²
Mainsail area
277 ft²25.7 m²
277 ft²25.7 m²
Genoa area
262 ft²24.3 m²
262 ft²24.3 m²
Rigging type
Sloop Marconi 19/20
Sloop Marconi 19/20
Mast configuration
Deck stepped mast
Deck stepped mast
Rotating spars
No
No
Number of levels of spreaders
1
1
Spreaders angle
Swept-back
Swept-back
Spars construction
Aluminum spars
Aluminum spars
Standing rigging
1x19 strand wire continuous
1x19 strand wire continuous
 
PerformancesOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
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/T21.09 m²/T
215 ft²/T20.01 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.
152
164
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 %
35 %
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.
7.20 knots
7.20 knots
 
Auxiliary engineOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Engine(s)
1 inboard engine
1 inboard engine
Fuel type
Diesel
Diesel
Fuel tank capacity
18.5 gal70 liters
18.5 gal70 liters
 
Accommodations and layoutOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Cockpit
Closed aft cockpit
Closed aft cockpit
Cabin(s) (min./max.)
2 / 3
2 / 3
Berth(s) (min./max.)
6 / 8
6 / 8
Head(s)
1
1
Freshwater tank capacity
52.8 gal200 liters
52.8 gal200 liters
Fridge/ice-box capacity
15.9 gal60 liters
15.9 gal60 liters
Boiler capacity
5.8 gal22 liters
5.8 gal22 liters
Maximum headroom
6’ 2”1.88 m
6’ 2”1.88 m
Galley headroom
6’1.83 m
6’1.83 m
Head headroom
5’ 11”1.81 m
5’ 11”1.81 m
 
SaloonOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Maximum headroom
6’ 1”1.85 m
6’ 1”1.85 m
Berth length
6’ 4”1.93 m
6’ 4”1.93 m
 
Fore cabinOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Maximum headroom
5’ 10”1.76 m
5’ 10”1.76 m
Berth length
6’ 7”2 m
6’ 7”2 m
Berth width
4’ 7”1.4 m
4’ 7”1.4 m
 
Aft cabinOcéanis 311 Fin keelOcéanis 311 Keel and centerboard
Maximum headroom
6’1.82 m
6’1.82 m
Berth length
6’ 7”2 m
6’ 7”2 m
Berth width
6’ 5”1.95 m
6’ 5”1.95 m
 
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