Iechyd Da — ORC Rating

GPH

760.2

OSN

734.8

LOA

9.33 m

Displacement

4820 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5795

Medium

0.8075

High

0.9881

Triple Offshore

Low

0.7495

Medium

1.0102

High

1.1803

Boat Specifications

Dimensions

Length overall: 9.33 m
Beam: 3.15 m
Draft: 1.77 m
Displacement: 4820 kg
Crew weight: 531 kg
Wetted surface: 22.82 m²

Sails

Mainsail: 17.94 m²
Genoa: 31.51 m²
Spinnaker: 66.05 m²
Asymmetric spinnaker: 0 m²

Design

Type: Miura
Builder: Halstead
Designer: Oswald Berkemayer
Year built: 1970

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.

6,44.6,3.679641,52,4.07,60,4.34,75,4.58,90,4.55,110,4.56,120,4.43,135,3.99,148,3.513952,150,3.44
8,43,4.361775,52,4.86,60,5.15,75,5.43,90,5.42,110,5.56,120,5.42,135,4.97,150,4.39,151.6,4.319907
10,42.7,4.898528,52,5.5,60,5.83,75,6.08,90,6.2,110,6.29,120,6.2,135,5.84,150,5.2,153.5,5.05065
12,43.3,5.427518,52,6,60,6.24,75,6.42,90,6.59,110,6.65,120,6.59,135,6.38,150,5.94,156.6,5.655106
14,42.3,5.786669,52,6.3,60,6.48,75,6.63,90,6.85,110,6.95,120,6.88,135,6.69,150,6.39,175,5.832193
16,41,5.975809,52,6.49,60,6.66,75,6.83,90,6.96,110,7.26,120,7.18,135,6.97,150,6.68,180,6.28
20,39.7,6.069668,52,6.64,60,6.87,75,7.19,90,7.25,110,7.71,120,7.79,135,7.57,150,7.21,180,6.84

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.07	4.34	4.58	4.55	4.56	4.43	3.99	3.44
8	4.86	5.15	5.43	5.42	5.56	5.42	4.97	4.39
10	5.5	5.83	6.08	6.2	6.29	6.2	5.84	5.2
12	6	6.24	6.42	6.59	6.65	6.59	6.38	5.94
14	6.3	6.48	6.63	6.85	6.95	6.88	6.69	6.39
16	6.49	6.66	6.83	6.96	7.26	7.18	6.97	6.68
20	6.64	6.87	7.19	7.25	7.71	7.79	7.57	7.21

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.6°	2.62	148°	2.98
8	43°	3.19	151.6°	3.8
10	42.7°	3.6	153.5°	4.52
12	43.3°	3.95	156.6°	5.19
14	42.3°	4.28	175°	5.81
16	41°	4.51	180°	6.28
20	39.7°	4.67	180°	6.84

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