Due: ORC Rating

GPH

671.2

OSN

648.8

LOA

9.61 m

Displacement

4019 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6019

Medium

0.8258

High

0.9519

Triple Offshore

Low

0.7738

Medium

1.0132

High

1.136

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.95 m
Displacement: 4019 kg
Crew weight: 400 kg
Wetted surface: 22.02 m²

Sails

Mainsail: 26.29 m²
Genoa: 26.74 m²
Spinnaker: 62.87 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998
Stability index: 112.7

Performance data

Polar CSV

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

6,43.2,4.403482,52,4.89,60,5.14,75,5.31,90,5.19,110,5.19,120,5.03,135,4.51,145.7,3.994682,150,3.81
8,40.8,5.151949,52,5.78,60,6.01,75,6.18,90,6.14,110,6.27,120,6.13,135,5.61,149.8,4.894277,150,4.88
10,39.4,5.694071,52,6.35,60,6.54,75,6.69,90,6.75,110,6.9,120,6.82,135,6.45,150,5.8,152.9,5.650334
12,38.7,6.009504,52,6.67,60,6.84,75,7,90,7.08,110,7.29,120,7.25,135,6.98,150,6.52,158.3,6.177805
14,38.2,6.120707,52,6.82,60,7.01,75,7.22,90,7.3,110,7.64,120,7.63,135,7.37,150,6.99,170,6.42765
16,38.1,6.188567,52,6.88,60,7.09,75,7.39,90,7.54,110,7.92,120,7.99,135,7.77,150,7.36,177.2,6.828152
20,38.4,6.214164,52,6.93,60,7.16,75,7.56,90,7.9,110,8.27,120,8.65,135,8.6,150,8.12,179,7.541149

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.89	5.14	5.31	5.19	5.19	5.03	4.51	3.81
8	5.78	6.01	6.18	6.14	6.27	6.13	5.61	4.88
10	6.35	6.54	6.69	6.75	6.9	6.82	6.45	5.8
12	6.67	6.84	7	7.08	7.29	7.25	6.98	6.52
14	6.82	7.01	7.22	7.3	7.64	7.63	7.37	6.99
16	6.88	7.09	7.39	7.54	7.92	7.99	7.77	7.36
20	6.93	7.16	7.56	7.9	8.27	8.65	8.6	8.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.21	145.7°	3.3
8	40.8°	3.9	149.8°	4.23
10	39.4°	4.4	152.9°	5.03
12	38.7°	4.69	158.3°	5.74
14	38.2°	4.81	170°	6.33
16	38.1°	4.87	177.2°	6.82
20	38.4°	4.87	179°	7.54

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°	4.89	5.78	6.35	6.67	6.82	6.88	6.93
60°	5.14	6.01	6.54	6.84	7.01	7.09	7.16
75°	5.31	6.18	6.69	7.00	7.22	7.39	7.56
90°	5.19	6.14	6.75	7.08	7.30	7.54	7.90
110°	5.19	6.27	6.90	7.29	7.64	7.92	8.27
120°	5.03	6.13	6.82	7.25	7.63	7.99	8.65
135°	4.51	5.61	6.45	6.98	7.37	7.77	8.60
150°	3.81	4.88	5.80	6.52	6.99	7.36	8.12