MIROKU II — ORC Rating

GPH

562.2

OSN

545.1

LOA

12 m

Displacement

4079 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7893

Medium

1.0938

High

1.2718

Triple Offshore

Low

1.0289

Medium

1.3627

High

1.5657

Boat Specifications

Dimensions

Length overall: 12 m
Beam: 3.36 m
Draft: 2.2 m
Displacement: 4079 kg
Crew weight: 791 kg
Wetted surface: 28.36 m²

Sails

Mainsail: 40.39 m²
Genoa: 45.15 m²
Spinnaker: 92.65 m²
Asymmetric spinnaker: 0 m²

Design

Type: YOKOYAMA 12m
Builder: ITO BOAT YARD
Designer: AKIRA YOKOYAMA
Year built: 2003

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.

6,44,5.296523,52,5.87,60,6.24,75,6.54,90,6.45,110,5.94,120,5.78,135,5.21,139.9,4.915538,150,4.34
8,42.5,6.401933,52,7.14,60,7.44,75,7.63,90,7.6,110,7.39,120,7.23,135,6.59,146.1,5.746903,150,5.5
10,40.3,7.001733,52,7.75,60,7.96,75,8.15,90,8.15,110,8.17,120,8.05,135,7.63,146.3,6.935479,150,6.66
12,39.1,7.228949,52,7.96,60,8.23,75,8.62,90,8.71,110,8.85,120,8.75,135,8.24,150,7.6,153.8,7.389176
14,38.2,7.329579,52,8.09,60,8.4,75,8.94,90,9.27,110,9.46,120,9.55,135,8.91,150,8.18,161.8,7.64233
16,37.8,7.378299,52,8.17,60,8.51,75,9.14,90,9.73,110,9.94,120,10.36,135,9.7,150,8.78,180,7.85
20,37.2,7.469901,52,8.3,60,8.67,75,9.36,90,10.21,110,10.78,120,11.42,135,11.77,150,10.27,180,8.94

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.87	6.24	6.54	6.45	5.94	5.78	5.21	4.34
8	7.14	7.44	7.63	7.6	7.39	7.23	6.59	5.5
10	7.75	7.96	8.15	8.15	8.17	8.05	7.63	6.66
12	7.96	8.23	8.62	8.71	8.85	8.75	8.24	7.6
14	8.09	8.4	8.94	9.27	9.46	9.55	8.91	8.18
16	8.17	8.51	9.14	9.73	9.94	10.36	9.7	8.78
20	8.3	8.67	9.36	10.21	10.78	11.42	11.77	10.27

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44°	3.81	139.9°	3.76
8	42.5°	4.72	146.1°	4.77
10	40.3°	5.34	146.3°	5.77
12	39.1°	5.61	153.8°	6.63
14	38.2°	5.76	161.8°	7.26
16	37.8°	5.83	180°	7.85
20	37.2°	5.95	180°	8.94

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