Jaffa — ORC Rating | RegattaPages

GPH

648.3

OSN

630.6

LOA

9.12 m

Displacement

2600 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6286

Medium

0.8483

High

0.9616

Triple Offshore

Low

0.8116

Medium

1.0424

High

1.1706

Boat Specifications

Dimensions

Length overall: 9.12 m
Beam: 3.19 m
Draft: 1.72 m
Displacement: 2600 kg
Crew weight: 526 kg
Wetted surface: 19.15 m²

Sails

Mainsail: 26.95 m²
Genoa: 25.12 m²
Spinnaker: 56.77 m²
Asymmetric spinnaker: 0 m²

Design

Type: One off
Builder: Steve Etheridge
Designer: Robert Weguelin
Year built: 1989

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.

6,42.8,4.565713,52,5.15,60,5.45,75,5.68,90,5.6,110,5.45,120,5.28,135,4.75,145,4.236088,150,4.01
8,41.2,5.382668,52,6.06,60,6.32,75,6.5,90,6.48,110,6.51,120,6.37,135,5.85,149.5,5.094999,150,5.07
10,39.9,5.956996,52,6.57,60,6.74,75,6.89,90,6.94,110,7.05,120,6.95,135,6.62,150,5.99,152,5.889364
12,38.6,6.116283,52,6.79,60,6.98,75,7.21,90,7.26,110,7.56,120,7.46,135,7.08,150,6.65,161,6.229386
14,39,6.240784,52,6.86,60,7.09,75,7.5,90,7.64,110,8.08,120,8.02,135,7.58,150,7.08,180,6.51
16,39,6.253651,52,6.89,60,7.15,75,7.65,90,8.01,110,8.47,120,8.63,135,8.14,150,7.54,180,6.95
20,40.1,6.314374,52,6.91,60,7.17,75,7.75,90,8.44,110,9.07,120,9.7,135,9.56,150,8.62,180,7.82

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.15	5.45	5.68	5.6	5.45	5.28	4.75	4.01
8	6.06	6.32	6.5	6.48	6.51	6.37	5.85	5.07
10	6.57	6.74	6.89	6.94	7.05	6.95	6.62	5.99
12	6.79	6.98	7.21	7.26	7.56	7.46	7.08	6.65
14	6.86	7.09	7.5	7.64	8.08	8.02	7.58	7.08
16	6.89	7.15	7.65	8.01	8.47	8.63	8.14	7.54
20	6.91	7.17	7.75	8.44	9.07	9.7	9.56	8.62

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.35	145°	3.47
8	41.2°	4.05	149.5°	4.39
10	39.9°	4.57	152°	5.2
12	38.6°	4.78	161°	5.89
14	39°	4.85	180°	6.51
16	39°	4.86	180°	6.95
20	40.1°	4.83	180°	7.82

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