J-CURVE — ORC Rating | RegattaPages

GPH

574.4

OSN

560.7

LOA

12.2 m

Displacement

7450 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7109

Medium

0.9517

High

1.0695

Triple Offshore

Low

0.9237

Medium

1.175

High

1.2989

Boat Specifications

Dimensions

Length overall: 12.2 m
Beam: 3.64 m
Draft: 2.24 m
Displacement: 7450 kg
Crew weight: 797 kg
Wetted surface: 32.97 m²

Sails

Mainsail: 51.05 m²
Genoa: 42.82 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 155.89 m²

Design

Type: J-122
Builder: J BOATS
Designer: ALAN JOHNSTONE
Year built: 2007
Stability index: 119.1

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.

6,43,5.018092,52,5.61,60,5.94,75,6.43,90,6.68,110,6.47,120,6.15,135,5.54,144.2,5.018101,150,4.71
8,41.8,5.982755,52,6.69,60,7,75,7.42,90,7.62,110,7.52,120,7.39,135,6.89,146.9,6.0999,150,5.9
10,40.6,6.664284,52,7.36,60,7.56,75,7.77,90,8.03,110,8.02,120,7.99,135,7.71,148.7,7.057098,150,6.97
12,39.4,6.910532,52,7.62,60,7.81,75,8,90,8.28,110,8.43,120,8.46,135,8.19,150,7.67,150.9,7.610679
14,38.4,6.97977,52,7.72,60,7.92,75,8.2,90,8.47,110,8.87,120,8.92,135,8.71,150,8.04,152,7.894013
16,38.2,7.04963,52,7.77,60,7.99,75,8.34,90,8.66,110,9.26,120,9.24,135,9.29,150,8.37,173,7.475723
20,38.1,7.217877,52,7.89,60,8.09,75,8.47,90,9.02,110,9.8,120,10.17,135,10.71,150,9.16,175.7,8.203091

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.61	5.94	6.43	6.68	6.47	6.15	5.54	4.71
8	6.69	7	7.42	7.62	7.52	7.39	6.89	5.9
10	7.36	7.56	7.77	8.03	8.02	7.99	7.71	6.97
12	7.62	7.81	8	8.28	8.43	8.46	8.19	7.67
14	7.72	7.92	8.2	8.47	8.87	8.92	8.71	8.04
16	7.77	7.99	8.34	8.66	9.26	9.24	9.29	8.37
20	7.89	8.09	8.47	9.02	9.8	10.17	10.71	9.16

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.67	144.2°	4.07
8	41.8°	4.46	146.9°	5.11
10	40.6°	5.06	148.7°	6.03
12	39.4°	5.34	150.9°	6.65
14	38.4°	5.47	152°	6.97
16	38.2°	5.54	173°	7.42
20	38.1°	5.68	175.7°	8.18

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