Histos: ORC Rating

GPH

670.3

OSN

648.5

LOA

9.49 m

Displacement

3796 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6765

Medium

0.9306

High

1.0754

Triple Offshore

Low

0.8691

Medium

1.1421

High

1.2834

Boat Specifications

Dimensions

Length overall: 9.49 m
Beam: 3.22 m
Draft: 1.93 m
Displacement: 3796 kg
Crew weight: 440 kg
Wetted surface: 22.08 m²

Sails

Mainsail: 23.82 m²
Genoa: 27.95 m²
Spinnaker: 62.07 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.

6,42.1,4.326286,52,4.85,60,5.08,75,5.27,90,5.19,110,5.16,120,5.01,135,4.53,146.4,3.973965,150,3.83
8,40.4,5.094951,52,5.76,60,6.02,75,6.2,90,6.17,110,6.27,120,6.1,135,5.57,150,4.86,150.3,4.846704
10,39.9,5.748436,52,6.41,60,6.59,75,6.72,90,6.81,110,6.89,120,6.79,135,6.45,150,5.75,151.8,5.662068
12,38.7,6.086385,52,6.71,60,6.86,75,7,90,7.11,110,7.26,120,7.18,135,6.93,150,6.5,157,6.192254
14,37.9,6.184385,52,6.84,60,7.02,75,7.22,90,7.27,110,7.63,120,7.57,135,7.29,150,6.94,180,6.32
16,37.7,6.243495,52,6.9,60,7.09,75,7.39,90,7.53,110,7.97,120,8,135,7.68,150,7.26,180,6.8
20,38.3,6.231074,52,6.91,60,7.12,75,7.53,90,7.96,110,8.35,120,8.79,135,8.59,150,8.02,180,7.46

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.85	5.08	5.27	5.19	5.16	5.01	4.53	3.83
8	5.76	6.02	6.2	6.17	6.27	6.1	5.57	4.86
10	6.41	6.59	6.72	6.81	6.89	6.79	6.45	5.75
12	6.71	6.86	7	7.11	7.26	7.18	6.93	6.5
14	6.84	7.02	7.22	7.27	7.63	7.57	7.29	6.94
16	6.9	7.09	7.39	7.53	7.97	8	7.68	7.26
20	6.91	7.12	7.53	7.96	8.35	8.79	8.59	8.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.1°	3.21	146.4°	3.31
8	40.4°	3.88	150.3°	4.21
10	39.9°	4.41	151.8°	4.99
12	38.7°	4.75	157°	5.7
14	37.9°	4.88	180°	6.32
16	37.7°	4.94	180°	6.8
20	38.3°	4.89	180°	7.46

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°	4.85	5.76	6.41	6.71	6.84	6.90	6.91
60°	5.08	6.02	6.59	6.86	7.02	7.09	7.12
75°	5.27	6.20	6.72	7.00	7.22	7.39	7.53
90°	5.19	6.17	6.81	7.11	7.27	7.53	7.96
110°	5.16	6.27	6.89	7.26	7.63	7.97	8.35
120°	5.01	6.10	6.79	7.18	7.57	8.00	8.79
135°	4.53	5.57	6.45	6.93	7.29	7.68	8.59
150°	3.83	4.86	5.75	6.50	6.94	7.26	8.02