NN - NOR14575
Sailing performance analysis for a Oceanis 311 from 1999, built by Beneteau and designed by Groupe Finot.
Data provided by the Offshore Racing Congress (ORC)
The Oceanis 311 is a capable cruiser-racer, managing a commendable 7.2 knots on a reach in 14 knots of wind. It performs well downwind, achieving 5.7 knots with its large symmetric spinnaker in 10 knots of breeze. The sail plan is well-balanced, with a jib that complements the mainsail. Although modestly canvassed for its size, this boat offers a solid all-around performance.
Sailing performance as a polar diagram
A polar diagram shows boat speed at different wind angles and wind speeds. The distance from center represents boat speed in knots, and the angle represents the boats angle to the wind. The wind speed is shown as true wind speed (TWS), not apparent wind speed. Likewise, the wind angle is shown as true wind angle (TWA), not apparent wind angle.
Beat: Sailing upwind (toward the wind)
Beam Reach: Sailing across the wind
Run: Sailing downwind (away from the wind)
VMG Performance
Wind Speed (columns): True wind speed (TWS) in knots - the actual wind speed, not the apparent wind you feel on deck.
VMG (Velocity Made Good) is your effective speed toward your destination, not your actual boat speed.
Beat VMG (top bars): Speed made good when sailing upwind. Higher is better - it means you're reaching the windward mark faster.
Run VMG (bottom bars): Speed made good when sailing downwind. Higher is better - it means you're reaching the leeward mark faster.
Identity
Dimensions
Sail Areas
ORC Rating
Rated boat speeds
| Wind Speed (TWS) | |||||||
|---|---|---|---|---|---|---|---|
| 6 kt | 8 kt | 10 kt | 12 kt | 14 kt | 16 kt | 20 kt | |
| Beat VMG | 2.94 | 3.55 | 4.02 | 4.41 | 4.63 | 4.70 | 4.66 |
| 52° | 4.60 | 5.46 | 6.10 | 6.51 | 6.72 | 6.80 | 6.82 |
| 60° | 4.90 | 5.79 | 6.39 | 6.71 | 6.90 | 7.01 | 7.06 |
| 75° | 5.12 | 6.04 | 6.59 | 6.88 | 7.08 | 7.25 | 7.46 |
| 90° | 5.25 | 6.27 | 6.84 | 7.13 | 7.30 | 7.41 | 7.78 |
| 110° | 5.29 | 6.36 | 6.91 | 7.24 | 7.57 | 7.91 | 8.37 |
| 120° | 5.12 | 6.18 | 6.82 | 7.17 | 7.51 | 7.89 | 8.64 |
| 135° | 4.62 | 5.64 | 6.48 | 6.94 | 7.26 | 7.61 | 8.41 |
| 150° | 3.90 | 4.92 | 5.80 | 6.53 | 6.94 | 7.24 | 7.92 |
| Run VMG | 3.38 | 4.26 | 5.03 | 5.73 | 6.35 | 6.81 | 7.42 |
Boat speed (knots) at wind angle / wind speed