SURPRISE — ORC Rating

GPH

664.4

OSN

641.9

LOA

9.61 m

Displacement

3741 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6062

Medium

0.8353

High

0.9674

Triple Offshore

Low

0.7803

Medium

1.0237

High

1.1537

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3741 kg
Crew weight: 500 kg
Wetted surface: 21.75 m²

Sails

Mainsail: 25.12 m²
Genoa: 30.26 m²
Spinnaker: 61.44 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998
Stability index: 117.3

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.

6,43.3,4.534382,52,5.03,60,5.28,75,5.43,90,5.29,110,5.14,120,4.97,135,4.45,145.7,3.922051,150,3.74
8,40.8,5.310471,52,5.93,60,6.15,75,6.3,90,6.24,110,6.25,120,6.08,135,5.55,149.6,4.8463,150,4.82
10,39.4,5.849364,52,6.48,60,6.65,75,6.79,90,6.79,110,6.9,120,6.8,135,6.41,150,5.75,152.3,5.635911
12,38.1,6.125029,52,6.78,60,6.94,75,7.09,90,7.15,110,7.32,120,7.25,135,6.96,150,6.49,157.7,6.160765
14,37.6,6.235093,52,6.93,60,7.11,75,7.32,90,7.39,110,7.7,120,7.65,135,7.36,150,6.97,169.4,6.409374
16,37.2,6.289783,52,7,60,7.2,75,7.51,90,7.65,110,8.03,120,8.04,135,7.77,150,7.35,177.2,6.808128
20,37.5,6.340176,52,7.06,60,7.29,75,7.7,90,8.05,110,8.51,120,8.83,135,8.64,150,8.12,178.1,7.534142

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.03	5.28	5.43	5.29	5.14	4.97	4.45	3.74
8	5.93	6.15	6.3	6.24	6.25	6.08	5.55	4.82
10	6.48	6.65	6.79	6.79	6.9	6.8	6.41	5.75
12	6.78	6.94	7.09	7.15	7.32	7.25	6.96	6.49
14	6.93	7.11	7.32	7.39	7.7	7.65	7.36	6.97
16	7	7.2	7.51	7.65	8.03	8.04	7.77	7.35
20	7.06	7.29	7.7	8.05	8.51	8.83	8.64	8.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	3.3	145.7°	3.24
8	40.8°	4.02	149.6°	4.18
10	39.4°	4.52	152.3°	4.99
12	38.1°	4.82	157.7°	5.7
14	37.6°	4.94	169.4°	6.3
16	37.2°	5.01	177.2°	6.8
20	37.5°	5.03	178.1°	7.53

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