Blauwe Knoop — ORC Rating

GPH

671.9

OSN

649.1

LOA

9.61 m

Displacement

3695 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5926

Medium

0.8238

High

0.9573

Triple Offshore

Low

0.7663

Medium

1.0148

High

1.1464

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3695 kg
Crew weight: 550 kg
Wetted surface: 21.79 m²

Sails

Mainsail: 25.55 m²
Genoa: 26.82 m²
Spinnaker: 61.65 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998
Stability index: 107.1

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.

6,43.2,4.28002,52,4.79,60,5.07,75,5.27,90,5.19,110,5.18,120,5.02,135,4.51,146,3.980519,150,3.81
8,42.3,5.137696,52,5.72,60,6.01,75,6.23,90,6.22,110,6.32,120,6.15,135,5.59,150,4.86,150.2,4.851541
10,40.8,5.719985,52,6.37,60,6.58,75,6.74,90,6.85,110,6.94,120,6.85,135,6.48,150,5.79,152,5.685502
12,39.4,6.095244,52,6.72,60,6.88,75,7.03,90,7.16,110,7.33,120,7.26,135,6.98,150,6.55,157,6.246572
14,38.7,6.227333,52,6.87,60,7.05,75,7.26,90,7.34,110,7.73,120,7.67,135,7.37,150,7,169.4,6.460242
16,38.2,6.260682,52,6.93,60,7.13,75,7.45,90,7.62,110,8.1,120,8.13,135,7.81,150,7.36,177.2,6.848176
20,38.8,6.274556,52,6.95,60,7.17,75,7.62,90,8.1,110,8.52,120,8.99,135,8.81,150,8.2,178.1,7.544148

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.79	5.07	5.27	5.19	5.18	5.02	4.51	3.81
8	5.72	6.01	6.23	6.22	6.32	6.15	5.59	4.86
10	6.37	6.58	6.74	6.85	6.94	6.85	6.48	5.79
12	6.72	6.88	7.03	7.16	7.33	7.26	6.98	6.55
14	6.87	7.05	7.26	7.34	7.73	7.67	7.37	7
16	6.93	7.13	7.45	7.62	8.1	8.13	7.81	7.36
20	6.95	7.17	7.62	8.1	8.52	8.99	8.81	8.2

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.12	146°	3.3
8	42.3°	3.8	150.2°	4.21
10	40.8°	4.33	152°	5.02
12	39.4°	4.71	157°	5.75
14	38.7°	4.86	169.4°	6.35
16	38.2°	4.92	177.2°	6.84
20	38.8°	4.89	178.1°	7.54

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