Iechyd Da — ORC Rating

GPH

758.1

OSN

728.6

LOA

9.33 m

Displacement

4820 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5201

Medium

0.7307

High

0.883

Triple Offshore

Low

0.6673

Medium

0.9028

High

1.0462

Boat Specifications

Dimensions

Length overall: 9.33 m
Beam: 3.15 m
Draft: 1.77 m
Displacement: 4820 kg
Crew weight: 491 kg
Wetted surface: 22.7 m²

Sails

Mainsail: 17.94 m²
Genoa: 32.3 m²
Spinnaker: 66.05 m²
Asymmetric spinnaker: 0 m²

Design

Type: Miura
Builder: Halstead
Designer: Oswald Berkemayer
Year built: 1970
Stability index: 126.2

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.

6,44.1,3.745859,52,4.13,60,4.35,75,4.47,90,4.38,110,4.52,120,4.38,135,3.92,147.8,3.462566,150,3.38
8,42.3,4.461684,52,4.96,60,5.18,75,5.32,90,5.37,110,5.52,120,5.39,135,4.94,150,4.36,151.1,4.317708
10,41.4,4.99926,52,5.55,60,5.76,75,5.92,90,6.08,110,6.21,120,6.13,135,5.77,150,5.2,153.3,5.059486
12,40.6,5.413085,52,5.97,60,6.15,75,6.3,90,6.49,110,6.62,120,6.57,135,6.33,150,5.89,158.6,5.552836
14,39.4,5.694071,52,6.25,60,6.4,75,6.55,90,6.74,110,6.92,120,6.88,135,6.69,150,6.36,169.4,5.839652
16,38.8,5.876783,52,6.43,60,6.58,75,6.74,90,6.9,110,7.18,120,7.17,135,6.99,150,6.69,176.6,6.22095
20,38.4,5.997243,52,6.59,60,6.77,75,7.03,90,7.12,110,7.61,120,7.7,135,7.57,150,7.24,179,6.821039

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.13	4.35	4.47	4.38	4.52	4.38	3.92	3.38
8	4.96	5.18	5.32	5.37	5.52	5.39	4.94	4.36
10	5.55	5.76	5.92	6.08	6.21	6.13	5.77	5.2
12	5.97	6.15	6.3	6.49	6.62	6.57	6.33	5.89
14	6.25	6.4	6.55	6.74	6.92	6.88	6.69	6.36
16	6.43	6.58	6.74	6.9	7.18	7.17	6.99	6.69
20	6.59	6.77	7.03	7.12	7.61	7.7	7.57	7.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.1°	2.69	147.8°	2.93
8	42.3°	3.3	151.1°	3.78
10	41.4°	3.75	153.3°	4.52
12	40.6°	4.11	158.6°	5.17
14	39.4°	4.4	169.4°	5.74
16	38.8°	4.58	176.6°	6.21
20	38.4°	4.7	179°	6.82

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