JAFFA — ORC Rating | RegattaPages

GPH

625.8

OSN

606.7

LOA

9.95 m

Displacement

4029 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6496

Medium

0.8856

High

1.0193

Triple Offshore

Low

0.8364

Medium

1.0822

High

1.2179

Boat Specifications

Dimensions

Length overall: 9.95 m
Beam: 3.41 m
Draft: 2.11 m
Displacement: 4029 kg
Crew weight: 581 kg
Wetted surface: 23.25 m²

Sails

Mainsail: 32.65 m²
Genoa: 26.14 m²
Spinnaker: 86.32 m²
Asymmetric spinnaker: 0 m²

Design

Type: J 99
Builder: J COMPOSITES
Designer: JOHNSTONE
Year built: 2019

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.

6,42.8,4.579342,52,5.14,60,5.43,75,5.65,90,5.65,110,5.74,120,5.58,135,5.05,145,4.529074,150,4.29
8,41.2,5.40925,52,6.09,60,6.38,75,6.59,90,6.72,110,6.84,120,6.72,135,6.23,148.5,5.477105,150,5.39
10,40.1,6.065983,52,6.72,60,6.91,75,7.05,90,7.21,110,7.36,120,7.29,135,7,150,6.35,151.5,6.269791
12,38.2,6.375207,52,7.04,60,7.2,75,7.35,90,7.4,110,7.79,120,7.76,135,7.45,150,7.01,158,6.67613
14,37.9,6.526554,52,7.18,60,7.37,75,7.61,90,7.67,110,8.14,120,8.26,135,7.92,150,7.43,180,6.8
16,37.7,6.5721,52,7.24,60,7.46,75,7.83,90,7.99,110,8.39,120,8.74,135,8.43,150,7.86,180,7.25
20,37.5,6.630085,52,7.28,60,7.51,75,8.03,90,8.52,110,8.86,120,9.36,135,9.72,150,8.84,180,8.07

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.14	5.43	5.65	5.65	5.74	5.58	5.05	4.29
8	6.09	6.38	6.59	6.72	6.84	6.72	6.23	5.39
10	6.72	6.91	7.05	7.21	7.36	7.29	7	6.35
12	7.04	7.2	7.35	7.4	7.79	7.76	7.45	7.01
14	7.18	7.37	7.61	7.67	8.14	8.26	7.92	7.43
16	7.24	7.46	7.83	7.99	8.39	8.74	8.43	7.86
20	7.28	7.51	8.03	8.52	8.86	9.36	9.72	8.84

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.36	145°	3.71
8	41.2°	4.07	148.5°	4.67
10	40.1°	4.64	151.5°	5.51
12	38.2°	5.01	158°	6.19
14	37.9°	5.15	180°	6.8
16	37.7°	5.2	180°	7.25
20	37.5°	5.26	180°	8.07

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