BLACK JACK — ORC Rating

GPH

496

OSN

482.1

LOA

12.79 m

Displacement

4456 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.819

Medium

1.0856

High

1.2749

Triple Offshore

Low

1.0605

Medium

1.3575

High

1.5731

Boat Specifications

Dimensions

Length overall: 12.79 m
Beam: 3.89 m
Draft: 3.01 m
Displacement: 4456 kg
Crew weight: 900 kg
Wetted surface: 31.6 m²

Sails

Mainsail: 64.24 m²
Genoa: 41.04 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 191.13 m²

Design

Type: GP 42
Builder: LATINI
Designer: FARR
Year built: 2006

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.

6,43.5,5.941759,52,6.63,60,7.07,75,7.43,90,7.36,110,7.29,120,7.07,135,6.27,141.5,5.77556,150,5.22
8,41.6,7.11422,52,7.91,60,8.18,75,8.37,90,8.32,110,8.48,120,8.41,135,7.94,140.5,7.490689,150,6.68
10,39,7.488941,52,8.34,60,8.66,75,9.08,90,9.06,110,9.2,120,9.42,135,8.84,147.8,8.012355,150,7.82
12,38.2,7.660428,52,8.54,60,8.94,75,9.64,90,9.93,110,9.83,120,10.17,135,9.94,150,8.78,152,8.539578
14,37.9,7.755827,52,8.66,60,9.12,75,9.94,90,10.62,110,10.5,120,10.81,135,11.25,148,9.810764,150,9.61
16,37.1,7.848704,52,8.81,60,9.24,75,10.14,90,11.04,110,11.18,120,11.61,135,12.47,144,11.569596,150,10.8
20,37.5,7.940976,52,9.03,60,9.62,75,10.62,90,11.56,110,13.11,120,13.28,135,14.3,144.1,14.863433,150,13.91

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.63	7.07	7.43	7.36	7.29	7.07	6.27	5.22
8	7.91	8.18	8.37	8.32	8.48	8.41	7.94	6.68
10	8.34	8.66	9.08	9.06	9.2	9.42	8.84	7.82
12	8.54	8.94	9.64	9.93	9.83	10.17	9.94	8.78
14	8.66	9.12	9.94	10.62	10.5	10.81	11.25	9.61
16	8.81	9.24	10.14	11.04	11.18	11.61	12.47	10.8
20	9.03	9.62	10.62	11.56	13.11	13.28	14.3	13.91

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	4.31	141.5°	4.52
8	41.6°	5.32	140.5°	5.78
10	39°	5.82	147.8°	6.78
12	38.2°	6.02	152°	7.54
14	37.9°	6.12	148°	8.32
16	37.1°	6.26	144°	9.36
20	37.5°	6.3	144.1°	12.04

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