LIGO-LIGO — ORC Rating

GPH

725.3

OSN

702.1

LOA

9.046 m

Displacement

3609 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5699

Medium

0.7688

High

0.8783

Triple Offshore

Low

0.7264

Medium

0.9329

High

1.0338

Boat Specifications

Dimensions

Length overall: 9.046 m
Beam: 3.1 m
Draft: 1.69 m
Displacement: 3609 kg
Crew weight: 400 kg
Wetted surface: 18.46 m²

Sails

Mainsail: 17.73 m²
Genoa: 31.23 m²
Spinnaker: 62.03 m²
Asymmetric spinnaker: 0 m²

Design

Type: SHAMROCK
Builder: SOUTH COAST BOATY.
Designer: R. HOLLAND
Year built: 1975
Stability index: 121.2

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.

6,43,4.129329,52,4.58,60,4.8,75,4.93,90,4.82,110,4.82,120,4.69,135,4.27,146.9,3.784086,150,3.66
8,41.5,4.846748,52,5.38,60,5.58,75,5.7,90,5.64,110,5.78,120,5.67,135,5.25,150,4.65,151.1,4.60327
10,40,5.299954,52,5.84,60,5.99,75,6.11,90,6.16,110,6.29,120,6.23,135,5.97,150,5.47,154.1,5.291489
12,38.8,5.543166,52,6.09,60,6.22,75,6.35,90,6.43,110,6.6,120,6.57,135,6.39,150,6.05,161.3,5.679837
14,38.4,5.65272,52,6.23,60,6.37,75,6.53,90,6.59,110,6.85,120,6.85,135,6.69,150,6.41,175.4,5.929098
16,38.2,5.726233,52,6.3,60,6.46,75,6.67,90,6.75,110,7.07,120,7.11,135,6.97,150,6.7,179,6.290958
20,38.5,5.77556,52,6.35,60,6.54,75,6.84,90,7.03,110,7.37,120,7.6,135,7.57,150,7.23,179,6.83104

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.58	4.8	4.93	4.82	4.82	4.69	4.27	3.66
8	5.38	5.58	5.7	5.64	5.78	5.67	5.25	4.65
10	5.84	5.99	6.11	6.16	6.29	6.23	5.97	5.47
12	6.09	6.22	6.35	6.43	6.6	6.57	6.39	6.05
14	6.23	6.37	6.53	6.59	6.85	6.85	6.69	6.41
16	6.3	6.46	6.67	6.75	7.07	7.11	6.97	6.7
20	6.35	6.54	6.84	7.03	7.37	7.6	7.57	7.23

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.02	146.9°	3.17
8	41.5°	3.63	151.1°	4.03
10	40°	4.06	154.1°	4.76
12	38.8°	4.32	161.3°	5.38
14	38.4°	4.43	175.4°	5.91
16	38.2°	4.5	179°	6.29
20	38.5°	4.52	179°	6.83

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