Blue Joy — ORC Rating

GPH

577.5

OSN

560.8

LOA

12.244 m

Displacement

6884 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7105

Medium

0.9551

High

1.0766

Triple Offshore

Low

0.9141

Medium

1.1717

High

1.2949

Boat Specifications

Dimensions

Length overall: 12.244 m
Beam: 3.67 m
Draft: 2.17 m
Displacement: 6884 kg
Crew weight: 850 kg
Wetted surface: 32.26 m²

Sails

Mainsail: 44.42 m²
Genoa: 54.64 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 146.98 m²

Design

Type: J 120
Builder: J Boats
Designer: Bob Johnstone
Year built: 1994
Stability index: 116

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.

6,43,5.264211,52,5.86,60,6.17,75,6.36,90,6.21,110,6.06,120,5.93,135,5.25,143.4,4.795611,150,4.44
8,40.8,6.182339,52,6.9,60,7.12,75,7.25,90,7.18,110,7.27,120,7.17,135,6.64,147.5,5.798019,150,5.64
10,39,6.716885,52,7.44,60,7.61,75,7.73,90,7.72,110,7.91,120,7.88,135,7.56,147.3,6.916132,150,6.73
12,37.8,6.922692,52,7.66,60,7.84,75,8.02,90,8.07,110,8.3,120,8.35,135,8.12,150,7.52,150.1,7.509545
14,37,7.024481,52,7.78,60,7.96,75,8.2,90,8.34,110,8.57,120,8.75,135,8.61,150,7.95,150.1,7.936355
16,36.6,7.099995,52,7.85,60,8.04,75,8.33,90,8.56,110,8.8,120,9.12,135,9.1,150,8.28,171.2,7.336361
20,36.4,7.193496,52,7.94,60,8.14,75,8.49,90,8.86,110,9.22,120,9.75,135,10.3,150,8.98,175.7,8.102808

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.86	6.17	6.36	6.21	6.06	5.93	5.25	4.44
8	6.9	7.12	7.25	7.18	7.27	7.17	6.64	5.64
10	7.44	7.61	7.73	7.72	7.91	7.88	7.56	6.73
12	7.66	7.84	8.02	8.07	8.3	8.35	8.12	7.52
14	7.78	7.96	8.2	8.34	8.57	8.75	8.61	7.95
16	7.85	8.04	8.33	8.56	8.8	9.12	9.1	8.28
20	7.94	8.14	8.49	8.86	9.22	9.75	10.3	8.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.85	143.4°	3.85
8	40.8°	4.68	147.5°	4.89
10	39°	5.22	147.3°	5.82
12	37.8°	5.47	150.1°	6.51
14	37°	5.61	150.1°	6.88
16	36.6°	5.7	171.2°	7.25
20	36.4°	5.79	175.7°	8.08

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