JMANIA — ORC Rating | RegattaPages

GPH

718.4

OSN

698.1

LOA

7.318 m

Displacement

1271 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5712

Medium

0.7677

High

0.8652

Triple Offshore

Low

0.7357

Medium

0.9378

High

1.0557

Boat Specifications

Dimensions

Length overall: 7.318 m
Beam: 2.69 m
Draft: 1.23 m
Displacement: 1271 kg
Crew weight: 400 kg
Wetted surface: 11.8 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.

6,43.1,4.163458,52,4.63,60,4.93,75,5.16,90,5.12,110,4.97,120,4.83,135,4.36,148,3.761579,150,3.68
8,42,4.884647,52,5.43,60,5.67,75,5.81,90,5.81,110,5.84,120,5.74,135,5.28,150,4.64,152,4.552932
10,40.7,5.342061,52,5.85,60,6.01,75,6.14,90,6.23,110,6.3,120,6.21,135,5.94,150,5.45,154,5.284859
12,39.4,5.564661,52,6.07,60,6.24,75,6.44,90,6.62,110,6.79,120,6.67,135,6.35,150,6,174,5.45991
14,39,5.636007,52,6.17,60,6.4,75,6.74,90,6.86,110,7.28,120,7.16,135,6.8,150,6.38,180,5.93
16,39,5.648874,52,6.21,60,6.48,75,6.93,90,7.19,110,7.77,120,7.74,135,7.28,150,6.79,180,6.28
20,40.9,5.649243,52,6.18,60,6.5,75,7.06,90,7.66,110,8.57,120,9.36,135,8.63,150,7.74,180,7.07

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.63	4.93	5.16	5.12	4.97	4.83	4.36	3.68
8	5.43	5.67	5.81	5.81	5.84	5.74	5.28	4.64
10	5.85	6.01	6.14	6.23	6.3	6.21	5.94	5.45
12	6.07	6.24	6.44	6.62	6.79	6.67	6.35	6
14	6.17	6.4	6.74	6.86	7.28	7.16	6.8	6.38
16	6.21	6.48	6.93	7.19	7.77	7.74	7.28	6.79
20	6.18	6.5	7.06	7.66	8.57	9.36	8.63	7.74

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.1°	3.04	148°	3.19
8	42°	3.63	152°	4.02
10	40.7°	4.05	154°	4.75
12	39.4°	4.3	174°	5.43
14	39°	4.38	180°	5.93
16	39°	4.39	180°	6.28
20	40.9°	4.27	180°	7.07

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