Dubbel Duck - NOR8856

Sailing performance analysis for a One Off 1/2 ton (series year 1983), built by OneOff and designed by D.Duckman.

Compare with another boat

9.152

Length (LOA)

meters

3.324

Beam

meters

1.501

Draft

meters

2,030

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC) · Certificate issued 14/04/2025

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

2.56

2.40

6 kt

3.47

3.42

8 kt

4.12

4.32

10 kt

4.44

5.10

12 kt

4.55

5.75

14 kt

4.59

6.24

16 kt

4.61

6.64

20 kt

4.56

7.39

24 kt

4.33

8.53

⛵

Identity

NameDubbel Duck

Sail #NOR8856

CountryNOR

BuilderOneOff

DesignerD.Duckman

Build Year—

Series Year1,983

📏

Dimensions

LOA9.15m

Beam3.32m

Draft1.5m

Disp.2,030kg

WS13.84m²

Crew373kg

⛵

Sail Areas

Genoa21.78m²

Main27.95m²

Spinnaker47.73m²

Total49.7m²

🏆

ORC Rating

GPHN/A

CDL7.1

APH ToT0.99

APH ToD605

OSN0.92

Triple Offshore

Light

0.806

Medium

0.9961

Heavy

1.0942

Triple Inshore

Light

0.6321

Medium

0.8218

Heavy

0.9123

📈

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	2.56	3.47	4.12	4.44	4.55	4.59	4.61	4.56	4.33
52°	4.02	5.24	5.95	6.27	6.39	6.46	6.50	6.53	6.45
60°	4.28	5.48	6.11	6.42	6.58	6.66	6.72	6.78	6.76
75°	4.43	5.63	6.22	6.56	6.80	6.96	7.05	7.20	7.25
90°	4.31	5.54	6.20	6.59	6.89	7.15	7.35	7.64	7.81
110°	4.06	5.37	6.22	6.69	7.08	7.42	7.71	8.16	8.42
120°	3.86	5.18	6.08	6.59	7.02	7.43	7.85	8.75	9.59
135°	3.35	4.64	5.65	6.29	6.73	7.15	7.60	8.79	11.20
150°	2.77	3.95	4.99	5.82	6.37	6.78	7.18	8.10	9.85
Run VMG	2.40	3.42	4.32	5.10	5.75	6.24	6.64	7.39	8.53

Boat speed (knots) at wind angle / wind speed