JOT — ORC Rating | RegattaPages

GPH

661.4

OSN

644.6

LOA

7.997 m

Displacement

1446 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6279

Medium

0.8248

High

0.938

Triple Offshore

Low

0.8073

Medium

1.0144

High

1.1456

Boat Specifications

Dimensions

Length overall: 7.997 m
Beam: 2.49 m
Draft: 1.49 m
Displacement: 1446 kg
Crew weight: 339 kg
Wetted surface: 13.63 m²

Sails

Mainsail: 21.17 m²
Genoa: 13.96 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 65.77 m²

Design

Type: J-80
Builder: J. Boats
Designer: R. Johnstone
Year built: 1993

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.

6,42.8,4.361278,52,4.91,60,5.21,75,5.43,90,5.57,110,5.7,120,5.56,135,4.96,145,4.455827,150,4.21
8,41.2,5.17002,52,5.8,60,6.01,75,6.16,90,6.34,110,6.48,120,6.42,135,6.07,148,5.388845,150,5.28
10,39,5.648874,52,6.23,60,6.38,75,6.52,90,6.61,110,7.02,120,7,135,6.67,149.8,6.109168,150,6.1
12,37.9,5.804198,52,6.41,60,6.6,75,6.85,90,6.92,110,7.43,120,7.63,135,7.28,150,6.59,150.5,6.560536
14,37.7,5.864335,52,6.48,60,6.73,75,7.14,90,7.33,110,7.74,120,8.18,135,7.98,150,7.01,176,6.175042
16,37.5,5.886406,52,6.52,60,6.79,75,7.31,90,7.7,110,8.09,120,8.61,135,8.84,144,8.170409,150,7.63
20,38.2,5.980733,52,6.63,60,6.93,75,7.44,90,8.17,110,8.8,120,9.54,135,11.09,140.2,11.037592,150,9.8

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.91	5.21	5.43	5.57	5.7	5.56	4.96	4.21
8	5.8	6.01	6.16	6.34	6.48	6.42	6.07	5.28
10	6.23	6.38	6.52	6.61	7.02	7	6.67	6.1
12	6.41	6.6	6.85	6.92	7.43	7.63	7.28	6.59
14	6.48	6.73	7.14	7.33	7.74	8.18	7.98	7.01
16	6.52	6.79	7.31	7.7	8.09	8.61	8.84	7.63
20	6.63	6.93	7.44	8.17	8.8	9.54	11.09	9.8

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.2	145°	3.65
8	41.2°	3.89	148°	4.57
10	39°	4.39	149.8°	5.28
12	37.9°	4.58	150.5°	5.71
14	37.7°	4.64	176°	6.16
16	37.5°	4.67	144°	6.61
20	38.2°	4.7	140.2°	8.48

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