Fun First — ORC Rating

GPH

664.8

OSN

644.7

LOA

9.61 m

Displacement

3828 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6054

Medium

0.8306

High

0.9564

Triple Offshore

Low

0.7828

Medium

1.0215

High

1.1461

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3828 kg
Crew weight: 550 kg
Wetted surface: 22.26 m²

Sails

Mainsail: 25.89 m²
Genoa: 31.53 m²
Spinnaker: 61.63 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
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.

6,42.8,4.429423,52,4.97,60,5.26,75,5.48,90,5.41,110,5.2,120,5.04,135,4.55,146,4.004644,150,3.84
8,41.2,5.209891,52,5.87,60,6.16,75,6.37,90,6.36,110,6.32,120,6.15,135,5.61,150,4.872836
10,40.5,5.838986,52,6.48,60,6.67,75,6.82,90,6.85,110,6.93,120,6.85,135,6.48,150,5.78,152,5.674176
12,39,6.124976,52,6.77,60,6.93,75,7.09,90,7.16,110,7.31,120,7.24,135,6.98,150,6.53,157,6.224845
14,38.4,6.226925,52,6.87,60,7.06,75,7.3,90,7.4,110,7.7,120,7.64,135,7.34,150,6.98,176,6.37553
16,38.2,6.260682,52,6.92,60,7.12,75,7.46,90,7.66,110,8.07,120,8.08,135,7.76,150,7.32,180,6.84
20,39,6.253651,52,6.93,60,7.15,75,7.58,90,8.08,110,8.51,120,8.94,135,8.71,150,8.11,180,7.53

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.97	5.26	5.48	5.41	5.2	5.04	4.55	3.84
8	5.87	6.16	6.37	6.36	6.32	6.15	5.61	4.87
10	6.48	6.67	6.82	6.85	6.93	6.85	6.48	5.78
12	6.77	6.93	7.09	7.16	7.31	7.24	6.98	6.53
14	6.87	7.06	7.3	7.4	7.7	7.64	7.34	6.98
16	6.92	7.12	7.46	7.66	8.07	8.08	7.76	7.32
20	6.93	7.15	7.58	8.08	8.51	8.94	8.71	8.11

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.25	146°	3.32
8	41.2°	3.92	150°	4.22
10	40.5°	4.44	152°	5.01
12	39°	4.76	157°	5.73
14	38.4°	4.88	176°	6.36
16	38.2°	4.92	180°	6.84
20	39°	4.86	180°	7.53

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