DIAMOND HEAD — ORC Rating

GPH

643.9

OSN

624.4

LOA

9.51 m

Displacement

2350 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6293

Medium

0.8553

High

0.9773

Triple Offshore

Low

0.814

Medium

1.0523

High

1.182

Boat Specifications

Dimensions

Length overall: 9.51 m
Beam: 2.49 m
Draft: 1.68 m
Displacement: 2350 kg
Crew weight: 516 kg
Wetted surface: 18.05 m²

Sails

Mainsail: 25.51 m²
Genoa: 24.74 m²
Spinnaker: 52.2 m²
Asymmetric spinnaker: 0 m²

Design

Type: SHAMROCK 950 MK2
Builder: KL NAUTIC
Designer: BRETECHET Giles
Year built: 1991

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.

6,43.8,4.779981,52,5.28,60,5.57,75,5.75,90,5.61,110,5.39,120,5.2,135,4.63,143.3,4.165754,150,3.85
8,41.2,5.595317,52,6.22,60,6.43,75,6.57,90,6.53,110,6.51,120,6.36,135,5.8,147.6,5.092808,150,4.97
10,39.1,6.030567,52,6.69,60,6.86,75,7,90,7.01,110,7.12,120,7.02,135,6.62,150,5.94,151.4,5.865717
12,38.2,6.184332,52,6.88,60,7.08,75,7.32,90,7.38,110,7.61,120,7.54,135,7.15,150,6.66,157.4,6.347417
14,38.4,6.303485,52,6.97,60,7.19,75,7.54,90,7.73,110,8.04,120,8.06,135,7.65,150,7.15,170.4,6.55175
16,38.4,6.367286,52,7.03,60,7.27,75,7.67,90,8.01,110,8.38,120,8.59,135,8.19,150,7.62,177.2,6.968319
20,38.8,6.428533,52,7.09,60,7.37,75,7.88,90,8.39,110,8.93,120,9.54,135,9.61,150,8.69,177.2,7.839359
24,40.6,6.440386,52,7.07,60,7.39,75,7.98,90,8.65,110,9.27,120,10.38,135,12.19,141.9,11.500314,150,10.46

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.28	5.57	5.75	5.61	5.39	5.2	4.63	3.85
8	6.22	6.43	6.57	6.53	6.51	6.36	5.8	4.97
10	6.69	6.86	7	7.01	7.12	7.02	6.62	5.94
12	6.88	7.08	7.32	7.38	7.61	7.54	7.15	6.66
14	6.97	7.19	7.54	7.73	8.04	8.06	7.65	7.15
16	7.03	7.27	7.67	8.01	8.38	8.59	8.19	7.62
20	7.09	7.37	7.88	8.39	8.93	9.54	9.61	8.69
24	7.07	7.39	7.98	8.65	9.27	10.38	12.19	10.46

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.8°	3.45	143.3°	3.34
8	41.2°	4.21	147.6°	4.3
10	39.1°	4.68	151.4°	5.15
12	38.2°	4.86	157.4°	5.86
14	38.4°	4.94	170.4°	6.46
16	38.4°	4.99	177.2°	6.96
20	38.8°	5.01	177.2°	7.83
24	40.6°	4.89	141.9°	9.05

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