FINALMENTE: ORC Rating

GPH

716.4

OSN

688.3

LOA

9.61 m

Displacement

3724 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5333

Medium

0.7688

High

0.936

Triple Offshore

Low

0.6935

Medium

0.9618

High

1.1255

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3724 kg
Crew weight: 530 kg
Wetted surface: 21.7 m²

Sails

Mainsail: 22.99 m²
Genoa: 23.74 m²
Spinnaker: 57.08 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998
Stability index: 118.7

Performance data

Polar CSV

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

6,45,3.818377,52,4.2,60,4.48,75,4.67,90,4.73,110,4.79,120,4.62,135,4.1,146.9,3.616966,150,3.49
8,43.6,4.681209,52,5.17,60,5.47,75,5.68,90,5.85,110,5.95,120,5.76,135,5.2,150,4.54,150.2,4.528874
10,42,5.261424,52,5.89,60,6.19,75,6.42,90,6.65,110,6.75,120,6.63,135,6.15,150,5.45,152.3,5.342257
12,41.2,5.781385,52,6.43,60,6.65,75,6.82,90,7.06,110,7.17,120,7.09,135,6.8,150,6.26,155,6.024443
14,40,6.12236,52,6.74,60,6.91,75,7.08,90,7.31,110,7.56,120,7.48,135,7.19,150,6.82,164,6.345827
16,39,6.227916,52,6.89,60,7.08,75,7.3,90,7.45,110,7.97,120,7.9,135,7.59,150,7.19,175.7,6.668772
20,39,6.266519,52,6.96,60,7.2,75,7.65,90,7.92,110,8.53,120,8.82,135,8.5,150,7.96,179,7.361121

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.2	4.48	4.67	4.73	4.79	4.62	4.1	3.49
8	5.17	5.47	5.68	5.85	5.95	5.76	5.2	4.54
10	5.89	6.19	6.42	6.65	6.75	6.63	6.15	5.45
12	6.43	6.65	6.82	7.06	7.17	7.09	6.8	6.26
14	6.74	6.91	7.08	7.31	7.56	7.48	7.19	6.82
16	6.89	7.08	7.3	7.45	7.97	7.9	7.59	7.19
20	6.96	7.2	7.65	7.92	8.53	8.82	8.5	7.96

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45°	2.7	146.9°	3.03
8	43.6°	3.39	150.2°	3.93
10	42°	3.91	152.3°	4.73
12	41.2°	4.35	155°	5.46
14	40°	4.69	164°	6.1
16	39°	4.84	175.7°	6.65
20	39°	4.87	179°	7.36

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°	4.20	5.17	5.89	6.43	6.74	6.89	6.96
60°	4.48	5.47	6.19	6.65	6.91	7.08	7.20
75°	4.67	5.68	6.42	6.82	7.08	7.30	7.65
90°	4.73	5.85	6.65	7.06	7.31	7.45	7.92
110°	4.79	5.95	6.75	7.17	7.56	7.97	8.53
120°	4.62	5.76	6.63	7.09	7.48	7.90	8.82
135°	4.10	5.20	6.15	6.80	7.19	7.59	8.50
150°	3.49	4.54	5.45	6.26	6.82	7.19	7.96