AURORA — ORC Rating | RegattaPages

GPH

718.9

OSN

698.1

LOA

7.318 m

Displacement

1271 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6411

Medium

0.8648

High

0.9774

Triple Offshore

Low

0.8256

Medium

1.0551

High

1.1887

Boat Specifications

Dimensions

Length overall: 7.318 m
Beam: 2.69 m
Draft: 1.22 m
Displacement: 1271 kg
Crew weight: 400 kg
Wetted surface: 11.94 m²

Sails

Mainsail: 16.03 m²
Genoa: 18.78 m²
Spinnaker: 35.34 m²
Asymmetric spinnaker: 0 m²

Design

Type: J-24
Builder: J-BOATS
Designer: JOHNSTONE
Year built: 1977

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.

6,43,4.156675,52,4.63,60,4.92,75,5.14,90,5.1,110,4.96,120,4.8,135,4.32,148.2,3.718116,150,3.65
8,42,4.898103,52,5.43,60,5.67,75,5.8,90,5.8,110,5.83,120,5.72,135,5.26,150,4.61,152,4.518955
10,40.4,5.344446,52,5.86,60,6.01,75,6.14,90,6.23,110,6.29,120,6.2,135,5.93,150,5.42,153.9,5.267099
12,39,5.571669,52,6.08,60,6.24,75,6.44,90,6.61,110,6.76,120,6.65,135,6.34,150,5.99,172.9,5.461882
14,38.5,5.635004,52,6.18,60,6.41,75,6.73,90,6.85,110,7.25,120,7.13,135,6.78,150,6.36,180,5.92
16,38.5,5.660559,52,6.23,60,6.49,75,6.92,90,7.17,110,7.73,120,7.68,135,7.24,150,6.77,180,6.27
20,40.3,5.651211,52,6.2,60,6.52,75,7.06,90,7.64,110,8.51,120,9.26,135,8.54,150,7.68,180,7.04

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.63	4.92	5.14	5.1	4.96	4.8	4.32	3.65
8	5.43	5.67	5.8	5.8	5.83	5.72	5.26	4.61
10	5.86	6.01	6.14	6.23	6.29	6.2	5.93	5.42
12	6.08	6.24	6.44	6.61	6.76	6.65	6.34	5.99
14	6.18	6.41	6.73	6.85	7.25	7.13	6.78	6.36
16	6.23	6.49	6.92	7.17	7.73	7.68	7.24	6.77
20	6.2	6.52	7.06	7.64	8.51	9.26	8.54	7.68

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.04	148.2°	3.16
8	42°	3.64	152°	3.99
10	40.4°	4.07	153.9°	4.73
12	39°	4.33	172.9°	5.42
14	38.5°	4.41	180°	5.92
16	38.5°	4.43	180°	6.27
20	40.3°	4.31	180°	7.04

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