Shark: ORC Rating

GPH

678.8

OSN

655.3

LOA

9.49 m

Displacement

3723 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6595

Medium

0.918

High

1.0755

Triple Offshore

Low

0.8496

Medium

1.1311

High

1.2858

Boat Specifications

Dimensions

Length overall: 9.49 m
Beam: 3.22 m
Draft: 1.92 m
Displacement: 3723 kg
Crew weight: 550 kg
Wetted surface: 22.06 m²

Sails

Mainsail: 25.65 m²
Genoa: 22.07 m²
Spinnaker: 60.57 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998

Performance data

Polar CSV

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

6,42.5,4.123279,52,4.62,60,4.86,75,5.06,90,5.09,110,5.16,120,5,135,4.52,146.4,3.973965,150,3.83
8,40.9,4.908359,52,5.53,60,5.79,75,6,90,6.19,110,6.27,120,6.11,135,5.58,150,4.86,150.4,4.841891
10,40.4,5.567678,52,6.24,60,6.45,75,6.61,90,6.83,110,6.9,120,6.8,135,6.45,150,5.76,152.3,5.647206
12,39.3,6.008992,52,6.64,60,6.8,75,6.93,90,7.14,110,7.29,120,7.2,135,6.94,150,6.51,157.3,6.189446
14,38.3,6.192847,52,6.83,60,7,75,7.17,90,7.31,110,7.68,120,7.6,135,7.3,150,6.94,180,6.33
16,37.9,6.24775,52,6.9,60,7.1,75,7.37,90,7.49,110,8.06,120,8.05,135,7.71,150,7.28,180,6.82
20,38.6,6.269829,52,6.92,60,7.15,75,7.59,90,7.99,110,8.49,120,8.92,135,8.65,150,8.07,180,7.49

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.62	4.86	5.06	5.09	5.16	5	4.52	3.83
8	5.53	5.79	6	6.19	6.27	6.11	5.58	4.86
10	6.24	6.45	6.61	6.83	6.9	6.8	6.45	5.76
12	6.64	6.8	6.93	7.14	7.29	7.2	6.94	6.51
14	6.83	7	7.17	7.31	7.68	7.6	7.3	6.94
16	6.9	7.1	7.37	7.49	8.06	8.05	7.71	7.28
20	6.92	7.15	7.59	7.99	8.49	8.92	8.65	8.07

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.5°	3.04	146.4°	3.31
8	40.9°	3.71	150.4°	4.21
10	40.4°	4.24	152.3°	5
12	39.3°	4.65	157.3°	5.71
14	38.3°	4.86	180°	6.33
16	37.9°	4.93	180°	6.82
20	38.6°	4.9	180°	7.49

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°	4.62	5.53	6.24	6.64	6.83	6.90	6.92
60°	4.86	5.79	6.45	6.80	7.00	7.10	7.15
75°	5.06	6.00	6.61	6.93	7.17	7.37	7.59
90°	5.09	6.19	6.83	7.14	7.31	7.49	7.99
110°	5.16	6.27	6.90	7.29	7.68	8.06	8.49
120°	5.00	6.11	6.80	7.20	7.60	8.05	8.92
135°	4.52	5.58	6.45	6.94	7.30	7.71	8.65
150°	3.83	4.86	5.76	6.51	6.94	7.28	8.07