Miria - NOR4753
Sailing performance analysis for a UFO 31 from 1979, built by COLVIC CRAFT and designed by HOLMAN&PYE.
Data provided by the Offshore Racing Congress (ORC) · Certificate issued 30/04/2026
This comfort cruiser offers a balanced sailing experience with a focus on ease and stability. It reaches a speed of 5.1 knots upwind in 10 knots of wind, and can achieve 6.78 knots on a reach in 14 knots of wind. Downwind performance is less impressive at 4.72 knots in 10 knots of wind, partly due to the modestly sized symmetric spinnaker. The large genoa paired with a smaller mainsail highlights its design for comfortable cruising rather than racing speeds.
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
| Date | Event | Result | Class | Skipper |
|---|---|---|---|---|
| 2026 | ||||
| 17.06.2026 | Asker Seilforening - Onsdagsserie vår 2026 | 6/8 | Liten =< 1.0700 | Lars Rune Hartveit |
| 12.06.2026 | Færderseilasen 2026 | 6/12 | RACING med spi 1 | Lars Rune HARTVEIT |
| 20.05.2026 | Asker og Bærum Seilforening Superonsdag 2026 | 15/24 | Liten Klasse | Lars Rune Hartveit |
| 2025 | ||||
| 17.09.2025 | Maritim Serieseilasen 2025 | 10/18 | Liten | Lars Rune Hartveit |
| 16.08.2025 | Asker Rundt 2025 | 7/10 | NOR Rating - Singlehanded | Lars Rune Hartveit |
| 13.06.2025 | Færderseilasen 2025 | 9/24 | Racing med spinnaker 1 | Lars Rune HARTVEIT |
| 14.05.2025 | Asker Seilforening og Bærum Seilforening Superonsdag | 5/31 | LITEN | Lars Rune Hartveit |
| 2024 | ||||
| 18.09.2024 | Bærum Seilforening Maritim Serieseilasen 2024 | 9/15 | F | Lars Rune Hartveit |
| 04.09.2024 | Superonsdager Bærum og Asker 2024 | 16/41 | Klasse F - APH <1,07 | Lars Rune Hartveit |
| 14.06.2024 | Færderseilasen 2024 | 14/18 | NOR-Rating med spinnaker (Mefjord) | Lars Rune HARTVEIT |
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 | 2.04 | 2.88 | 3.47 | 3.90 | 4.19 | 4.33 | 4.40 | 4.42 | 4.31 |
| 52° | 3.20 | 4.38 | 5.16 | 5.67 | 5.96 | 6.11 | 6.19 | 6.24 | 6.21 |
| 60° | 3.42 | 4.59 | 5.37 | 5.84 | 6.10 | 6.26 | 6.35 | 6.42 | 6.41 |
| 75° | 3.56 | 4.71 | 5.51 | 5.98 | 6.24 | 6.41 | 6.54 | 6.71 | 6.77 |
| 90° | 3.45 | 4.63 | 5.55 | 6.07 | 6.33 | 6.46 | 6.63 | 6.92 | 7.12 |
| 110° | 3.43 | 4.74 | 5.68 | 6.21 | 6.51 | 6.76 | 6.97 | 7.24 | 7.39 |
| 120° | 3.30 | 4.59 | 5.55 | 6.15 | 6.50 | 6.78 | 7.05 | 7.52 | 7.73 |
| 135° | 2.93 | 4.20 | 5.16 | 5.90 | 6.33 | 6.64 | 6.94 | 7.53 | 7.99 |
| 150° | 2.47 | 3.64 | 4.61 | 5.42 | 6.01 | 6.38 | 6.66 | 7.23 | 7.77 |
| Run VMG | 2.14 | 3.15 | 4.00 | 4.72 | 5.36 | 5.85 | 6.22 | 6.75 | 7.27 |
Boat speed (knots) at wind angle / wind speed