Iechyd Da — ORC Rating

GPH

736.9

OSN

712.7

LOA

9.33 m

Displacement

4820 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6098

Medium

0.8394

High

1.012

Triple Offshore

Low

0.7839

Medium

1.0379

High

1.1963

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.

6,44,3.892458,52,4.3,60,4.55,75,4.72,90,4.66,110,4.74,120,4.61,135,4.19,147.8,3.687101,150,3.6
8,41.6,4.493191,52,5.08,60,5.35,75,5.55,90,5.58,110,5.74,120,5.61,135,5.14,150,4.54,151.7,4.463488
10,41.6,5.05484,52,5.69,60,5.95,75,6.13,90,6.28,110,6.38,120,6.3,135,5.98,150,5.35,152.7,5.232849
12,41.7,5.571641,52,6.11,60,6.29,75,6.43,90,6.62,110,6.71,120,6.66,135,6.46,150,6.06,157.5,5.758327
14,39.8,5.831181,52,6.36,60,6.5,75,6.63,90,6.85,110,7.01,120,6.95,135,6.75,150,6.47,176.6,5.930439
16,38.8,5.992265,52,6.51,60,6.66,75,6.81,90,6.98,110,7.31,120,7.27,135,7.05,150,6.74,179.9,6.36001
20,38.3,6.065422,52,6.64,60,6.83,75,7.12,90,7.23,110,7.74,120,7.85,135,7.66,150,7.29,180,6.89

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.3	4.55	4.72	4.66	4.74	4.61	4.19	3.6
8	5.08	5.35	5.55	5.58	5.74	5.61	5.14	4.54
10	5.69	5.95	6.13	6.28	6.38	6.3	5.98	5.35
12	6.11	6.29	6.43	6.62	6.71	6.66	6.46	6.06
14	6.36	6.5	6.63	6.85	7.01	6.95	6.75	6.47
16	6.51	6.66	6.81	6.98	7.31	7.27	7.05	6.74
20	6.64	6.83	7.12	7.23	7.74	7.85	7.66	7.29

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44°	2.8	147.8°	3.12
8	41.6°	3.36	151.7°	3.93
10	41.6°	3.78	152.7°	4.65
12	41.7°	4.16	157.5°	5.32
14	39.8°	4.48	176.6°	5.92
16	38.8°	4.67	179.9°	6.36
20	38.3°	4.76	180°	6.89

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