DIAMOND HEAD — ORC Rating

GPH

646.2

OSN

626.6

LOA

9.51 m

Displacement

2350 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6183

Medium

0.8518

High

0.9765

Triple Offshore

Low

0.8039

Medium

1.0518

High

1.1889

Boat Specifications

Dimensions

Length overall: 9.51 m
Beam: 2.49 m
Draft: 1.68 m
Displacement: 2350 kg
Crew weight: 519 kg
Wetted surface: 17.92 m²

Sails

Mainsail: 25.44 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
Stability index: 115.3

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.

6,43.6,4.570738,52,5.1,60,5.43,75,5.68,90,5.58,110,5.38,120,5.2,135,4.64,144.2,4.142707,150,3.87
8,42.4,5.511505,52,6.14,60,6.4,75,6.58,90,6.58,110,6.56,120,6.41,135,5.81,148.4,5.060307,150,4.97
10,40.5,6.075702,52,6.68,60,6.85,75,6.99,90,7.03,110,7.14,120,7.04,135,6.67,150,5.97,150.2,5.957831
12,39,6.202181,52,6.86,60,7.07,75,7.33,90,7.41,110,7.69,120,7.59,135,7.17,150,6.71,157.4,6.401576
14,39,6.317989,52,6.94,60,7.17,75,7.59,90,7.83,110,8.21,120,8.2,135,7.7,150,7.17,170.3,6.60442
16,39,6.36946,52,6.98,60,7.23,75,7.73,90,8.2,110,8.57,120,8.86,135,8.32,150,7.67,177.2,6.988343
20,39.1,6.430028,52,7.06,60,7.32,75,7.86,90,8.58,110,9.19,120,9.84,135,9.92,150,8.88,175.4,7.925529

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.1	5.43	5.68	5.58	5.38	5.2	4.64	3.87
8	6.14	6.4	6.58	6.58	6.56	6.41	5.81	4.97
10	6.68	6.85	6.99	7.03	7.14	7.04	6.67	5.97
12	6.86	7.07	7.33	7.41	7.69	7.59	7.17	6.71
14	6.94	7.17	7.59	7.83	8.21	8.2	7.7	7.17
16	6.98	7.23	7.73	8.2	8.57	8.86	8.32	7.67
20	7.06	7.32	7.86	8.58	9.19	9.84	9.92	8.88

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.31	144.2°	3.36
8	42.4°	4.07	148.4°	4.31
10	40.5°	4.62	150.2°	5.17
12	39°	4.82	157.4°	5.91
14	39°	4.91	170.3°	6.51
16	39°	4.95	177.2°	6.98
20	39.1°	4.99	175.4°	7.9

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