Fair Dinkum — ORC Rating

GPH

566.8

OSN

549.8

LOA

12.19 m

Displacement

6927 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7298

Medium

0.9738

High

1.0952

Triple Offshore

Low

0.9347

Medium

1.1914

High

1.3212

Boat Specifications

Dimensions

Length overall: 12.19 m
Beam: 3.64 m
Draft: 2.22 m
Displacement: 6927 kg
Crew weight: 753 kg
Wetted surface: 32.21 m²

Sails

Mainsail: 49.92 m²
Genoa: 41.38 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 146.45 m²

Design

Type: J-122 (DK)
Builder: J-boats
Designer: Johnstone
Year built: 2006

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.

6,42.9,5.242014,52,5.84,60,6.14,75,6.34,90,6.21,110,6.32,120,6.18,135,5.57,143.3,5.088705,150,4.71
8,40.9,6.204906,52,6.9,60,7.13,75,7.27,90,7.33,110,7.48,120,7.38,135,6.87,146.7,6.149742,150,5.93
10,39,6.781223,52,7.49,60,7.65,75,7.77,90,7.83,110,8.07,120,8.02,135,7.7,149.4,7.005583,150,6.96
12,37.5,7.008227,52,7.76,60,7.93,75,8.09,90,8.11,110,8.49,120,8.52,135,8.24,150,7.66,150.7,7.614074
14,37,7.137173,52,7.89,60,8.1,75,8.34,90,8.42,110,8.8,120,8.99,135,8.75,150,8.07,150.5,8.031199
16,36.8,7.230889,52,7.97,60,8.19,75,8.52,90,8.7,110,9.06,120,9.44,135,9.29,150,8.42,173,7.475723
20,36.6,7.311749,52,8.07,60,8.31,75,8.74,90,9.15,110,9.54,120,10.14,135,10.72,150,9.19,175.7,8.253232
24,37.5,7.348554,52,8.09,60,8.36,75,8.87,90,9.45,110,10.01,120,10.88,135,13,140.4,12.848579,150,11.44

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.84	6.14	6.34	6.21	6.32	6.18	5.57	4.71
8	6.9	7.13	7.27	7.33	7.48	7.38	6.87	5.93
10	7.49	7.65	7.77	7.83	8.07	8.02	7.7	6.96
12	7.76	7.93	8.09	8.11	8.49	8.52	8.24	7.66
14	7.89	8.1	8.34	8.42	8.8	8.99	8.75	8.07
16	7.97	8.19	8.52	8.7	9.06	9.44	9.29	8.42
20	8.07	8.31	8.74	9.15	9.54	10.14	10.72	9.19
24	8.09	8.36	8.87	9.45	10.01	10.88	13	11.44

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.84	143.3°	4.08
8	40.9°	4.69	146.7°	5.14
10	39°	5.27	149.4°	6.03
12	37.5°	5.56	150.7°	6.64
14	37°	5.7	150.5°	6.99
16	36.8°	5.79	173°	7.42
20	36.6°	5.87	175.7°	8.23
24	37.5°	5.83	140.4°	9.9

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