Alida - NOR9479

Sailing performance analysis for a DUFOUR 30 CLASSIC from 1999, built by Dufour Yachts and designed by Olivier Poncinand J&JDesigns.

Compare with another boat

9.04

Length (LOA)

meters

3.04

Beam

meters

1.559

Draft

meters

3,536

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC) · Certificate issued 07/05/2025

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)

Wind Speed

4kt

6kt

8kt

10kt

12kt

14kt

16kt

20kt

24kt

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.

4 kt

2.01

2.22

6 kt

2.79

3.22

8 kt

3.42

4.13

10 kt

3.88

4.90

12 kt

4.23

5.58

14 kt

4.45

6.12

16 kt

4.53

6.53

20 kt

4.51

7.15

24 kt

4.34

7.74

⛵

Identity

NameAlida

Sail #NOR9479

CountryNOR

BuilderDufour Yachts

DesignerOlivier Poncinand J&JDesigns

Build Year1,999

Series Year1,996

📏

Dimensions

LOA9.04m

Beam3.04m

Draft1.56m

Disp.3,536kg

WS18.59m²

Crew491kg

⛵

Sail Areas

Genoa18.75m²

Main22.36m²

Spinnaker57.77m²

Total41.1m²

🏆

ORC Rating

GPHN/A

CDL7.14

APH ToT0.94

APH ToD638.2

OSN0.86

Triple Offshore

Light

0.7155

Medium

0.9468

Heavy

1.0682

Triple Inshore

Light

0.5541

Medium

0.7683

Heavy

0.8939

📈

Rated boat speeds

Wind angle (TWA)

	Wind Speed (TWS)
	4 kt	6 kt	8 kt	10 kt	12 kt	14 kt	16 kt	20 kt	24 kt
Beat VMG	2.01	2.79	3.42	3.88	4.23	4.45	4.53	4.51	4.34
52°	3.18	4.34	5.21	5.80	6.18	6.41	6.52	6.56	6.49
60°	3.40	4.61	5.48	6.03	6.37	6.59	6.72	6.79	6.76
75°	3.54	4.77	5.65	6.22	6.55	6.77	6.95	7.16	7.21
90°	3.57	4.89	5.88	6.46	6.77	6.92	7.03	7.39	7.62
110°	3.63	4.98	5.99	6.57	6.92	7.22	7.48	7.80	8.04
120°	3.48	4.81	5.83	6.48	6.87	7.20	7.52	8.11	8.53
135°	3.10	4.34	5.37	6.17	6.65	7.00	7.34	8.04	8.99
150°	2.57	3.72	4.76	5.63	6.28	6.70	7.02	7.66	8.42
Run VMG	2.22	3.22	4.13	4.90	5.58	6.12	6.53	7.15	7.74

Boat speed (knots) at wind angle / wind speed