Sirene - NOR11649
Sailing performance analysis for a First 31.7 LR from 2006, built by Beneteau and designed by Finot.
Data provided by the Offshore Racing Congress (ORC) · Certificate issued 12/08/2026
The description is written by AI, but its numbers and comparisons are calculated before the text is generated.
The speed ranking comes from the ORC polar at 5 m/s and is compared with 324 Norwegian boats within ±5% of this boat's length. Upwind and downwind use VMG; reaching uses boat speed.
The scoring advantage is calculated using APH Time-on-Time against 84 Norwegian boats with similar APH from certificate year 2026. It is shown only when the advantage is clear across most of the condition range.
This is modelled performance, not a forecast. Course, waves, sails, crew, and tactics still matter.
Beneteau First 31.7 LR is faster upwind than 60 percent of comparable boats. In 10 knots of wind, it achieves 5.7 knots upwind, 6.9 knots reaching, and 5.0 knots downwind. It has an advantage on corrected scoring in 20 knots of wind when the course includes plenty of close-reaching.
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.
Measured sails
Measurements
🏁 Race Results 🥉1
| Date | Event | Result | Class | Skipper |
|---|---|---|---|---|
| 2026 | ||||
| 23.09.2026 | Asker Seilforening - Onsdagsserie høst 2026 | 5/10 | Liten =< 1.0700 | Siri Sorteberg |
| 02.09.2026 | Asker Seilforening - Klubbmesterskap - Storbåt | 6/9 | Liten =< 1.0700 | Siri Sorteberg |
| 17.06.2026 | Asker Seilforening - Onsdagsserie vår 2026 | 3/8🥉 | Liten =< 1.0700 | Siri Sorteberg |
| 29.05.2026 | Oslofjorden Rundt 2026 | 13/13 | Full Crew | Siri SORTEBERG |
| 20.05.2026 | Asker og Bærum Seilforening Superonsdag 2026 | 6/25 | Liten Klasse | Siri Sorteberg |
| 2025 | ||||
| 10.09.2025 | Asker seilforening Klubbmesterskap Storbåt | 8/11 | Liten Klasse | Siri Sorteberg |
| 23.08.2025 | Sooningen 2025 | 6/12 | NOR rating | Siri SORTEBERG |
| 13.08.2025 | Asker Seilforening - Onsdagsserie høst | 7/12 | Liten =< 1.0700 | Siri Sorteberg |
| 14.05.2025 | Asker Seilforening og Bærum Seilforening Superonsdag | 21/31 | LITEN | Siri Sorteberg |
| 30.04.2025 | Asker Seilforening - Onsdagsserie vår | 9/12 | LITEN =< 1.0700 | Siri Sorteberg |
| 2024 | ||||
| 04.09.2024 | Superonsdager Bærum og Asker 2024 | 10/41 | Klasse F - APH <1,07 | Siri SORTEBERG |
| 07.06.2024 | Oslofjorden Rundt | 7/8 | Full crew | Siri SORTEBERG |
Race results from manage2sail.com & sailracesystem.no
Identity
Dimensions
Sail Areas
ORC Rating
Rated boat speeds
| Wind Speed (TWS) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4 kt | 6 kt | 8 kt | 10 kt | 12 kt | 14 kt | 16 kt | 20 kt | 24 kt | |
| Beat VMG | 2.24 | 3.20 | 3.91 | 4.42 | 4.74 | 4.87 | 4.93 | 4.95 | 4.87 |
| 52° | 3.51 | 4.89 | 5.81 | 6.38 | 6.70 | 6.85 | 6.92 | 6.98 | 6.96 |
| 60° | 3.76 | 5.15 | 6.05 | 6.57 | 6.86 | 7.04 | 7.12 | 7.20 | 7.21 |
| 75° | 3.93 | 5.30 | 6.21 | 6.71 | 7.02 | 7.24 | 7.41 | 7.58 | 7.67 |
| 90° | 3.80 | 5.18 | 6.13 | 6.76 | 7.10 | 7.32 | 7.56 | 7.93 | 8.14 |
| 110° | 3.63 | 5.13 | 6.23 | 6.87 | 7.27 | 7.62 | 7.92 | 8.33 | 8.65 |
| 120° | 3.48 | 4.94 | 6.04 | 6.76 | 7.20 | 7.58 | 7.96 | 8.72 | 9.30 |
| 135° | 3.02 | 4.42 | 5.51 | 6.38 | 6.93 | 7.33 | 7.72 | 8.62 | 9.89 |
| 150° | 2.51 | 3.75 | 4.83 | 5.76 | 6.49 | 6.97 | 7.34 | 8.10 | 9.10 |
| Run VMG | 2.17 | 3.25 | 4.19 | 5.00 | 5.72 | 6.31 | 6.77 | 7.48 | 8.18 |
Boat speed (knots) at wind angle / wind speed