Track — ORC Rating | RegattaPages

GPH

670.9

OSN

650.5

LOA

9.5 m

Displacement

3870 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5994

Medium

0.8224

High

0.9451

Triple Offshore

Low

0.7741

Medium

1.0135

High

1.1342

Boat Specifications

Dimensions

Length overall: 9.5 m
Beam: 3.21 m
Draft: 1.94 m
Displacement: 3870 kg
Crew weight: 420 kg
Wetted surface: 22.22 m²

Sails

Mainsail: 26.5 m²
Genoa: 26.52 m²
Spinnaker: 61.76 m²
Asymmetric spinnaker: 0 m²

Design

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

Velocity Prediction

Polar CSV

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

6,42.8,4.320391,52,4.85,60,5.13,75,5.35,90,5.27,110,5.23,120,5.06,135,4.57,146,4.028768,150,3.85
8,41.2,5.090277,52,5.73,60,6.02,75,6.25,90,6.23,110,6.33,120,6.18,135,5.63,150,4.89593
10,40.5,5.707478,52,6.38,60,6.58,75,6.74,90,6.83,110,6.93,120,6.85,135,6.5,150,5.8,152,5.696827
12,39.8,6.078485,52,6.69,60,6.86,75,7.02,90,7.1,110,7.3,120,7.24,135,6.99,150,6.55,157,6.235709
14,39,6.163578,52,6.81,60,7,75,7.23,90,7.32,110,7.66,120,7.63,135,7.35,150,6.99,180,6.37
16,39,6.202181,52,6.85,60,7.06,75,7.38,90,7.57,110,7.95,120,8.05,135,7.76,150,7.33,180,6.86
20,39.9,6.178591,52,6.85,60,7.08,75,7.49,90,7.97,110,8.33,120,8.74,135,8.69,150,8.12,180,7.54

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.85	5.13	5.35	5.27	5.23	5.06	4.57	3.85
8	5.73	6.02	6.25	6.23	6.33	6.18	5.63	4.89
10	6.38	6.58	6.74	6.83	6.93	6.85	6.5	5.8
12	6.69	6.86	7.02	7.1	7.3	7.24	6.99	6.55
14	6.81	7	7.23	7.32	7.66	7.63	7.35	6.99
16	6.85	7.06	7.38	7.57	7.95	8.05	7.76	7.33
20	6.85	7.08	7.49	7.97	8.33	8.74	8.69	8.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.17	146°	3.34
8	41.2°	3.83	150°	4.24
10	40.5°	4.34	152°	5.03
12	39.8°	4.67	157°	5.74
14	39°	4.79	180°	6.37
16	39°	4.82	180°	6.86
20	39.9°	4.74	180°	7.54

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