ARJAU II: ORC Rating

GPH

744

OSN

720.8

LOA

9.32 m

Displacement

5098 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6158

Medium

0.8325

High

0.9741

Triple Offshore

Low

0.7855

Medium

1.0262

High

1.1577

Boat Specifications

Dimensions

Length overall: 9.32 m
Beam: 3.29 m
Draft: 1.82 m
Displacement: 5098 kg
Crew weight: 400 kg
Wetted surface: 21.28 m²

Sails

Mainsail: 17.07 m²
Genoa: 33.2 m²
Spinnaker: 62.89 m²
Asymmetric spinnaker: 0 m²

Design

Type: DUFOUR 31
Builder: TAYLOR
Designer: M. DUFOUR
Year built: 1975

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,42.4,3.872949,52,4.32,60,4.53,75,4.69,90,4.65,110,4.68,120,4.55,135,4.18,148.2,3.682818,150,3.61
8,40.9,4.498226,52,5.05,60,5.3,75,5.5,90,5.51,110,5.65,120,5.52,135,5.09,150,4.53,152.2,4.442782
10,41.1,5.042708,52,5.67,60,5.9,75,6.06,90,6.18,110,6.27,120,6.19,135,5.9,150,5.3,154.1,5.12474
12,41.4,5.505851,52,6.04,60,6.2,75,6.34,90,6.49,110,6.59,120,6.53,135,6.35,150,5.98,158.3,5.661194
14,40.7,5.711389,52,6.22,60,6.38,75,6.53,90,6.66,110,6.85,120,6.81,135,6.63,150,6.36,180,5.85
16,40.5,5.812685,52,6.33,60,6.49,75,6.68,90,6.75,110,7.11,120,7.1,135,6.9,150,6.62,180,6.27
20,40.8,5.865296,52,6.38,60,6.58,75,6.9,90,7.07,110,7.43,120,7.6,135,7.46,150,7.13,180,6.78

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.32	4.53	4.69	4.65	4.68	4.55	4.18	3.61
8	5.05	5.3	5.5	5.51	5.65	5.52	5.09	4.53
10	5.67	5.9	6.06	6.18	6.27	6.19	5.9	5.3
12	6.04	6.2	6.34	6.49	6.59	6.53	6.35	5.98
14	6.22	6.38	6.53	6.66	6.85	6.81	6.63	6.36
16	6.33	6.49	6.68	6.75	7.11	7.1	6.9	6.62
20	6.38	6.58	6.9	7.07	7.43	7.6	7.46	7.13

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	2.86	148.2°	3.13
8	40.9°	3.4	152.2°	3.93
10	41.1°	3.8	154.1°	4.61
12	41.4°	4.13	158.3°	5.26
14	40.7°	4.33	180°	5.85
16	40.5°	4.42	180°	6.27
20	40.8°	4.44	180°	6.78

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.32	5.05	5.67	6.04	6.22	6.33	6.38
60°	4.53	5.30	5.90	6.20	6.38	6.49	6.58
75°	4.69	5.50	6.06	6.34	6.53	6.68	6.90
90°	4.65	5.51	6.18	6.49	6.66	6.75	7.07
110°	4.68	5.65	6.27	6.59	6.85	7.11	7.43
120°	4.55	5.52	6.19	6.53	6.81	7.10	7.60
135°	4.18	5.09	5.90	6.35	6.63	6.90	7.46
150°	3.61	4.53	5.30	5.98	6.36	6.62	7.13