LIGO-LIGO — ORC Rating

GPH

730.5

OSN

706.8

LOA

9.046 m

Displacement

3609 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5565

Medium

0.7592

High

0.885

Triple Offshore

Low

0.7125

Medium

0.9289

High

1.0452

Boat Specifications

Dimensions

Length overall: 9.046 m
Beam: 3.1 m
Draft: 1.69 m
Displacement: 3609 kg
Crew weight: 500 kg
Wetted surface: 18.67 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: 120.1

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.

6,43,3.96525,52,4.41,60,4.65,75,4.82,90,4.75,110,4.78,120,4.65,135,4.26,147.8,3.769825,150,3.68
8,41.4,4.599319,52,5.21,60,5.49,75,5.68,90,5.67,110,5.8,120,5.67,135,5.21,150,4.62,152,4.541606
10,42,5.247968,52,5.8,60,5.99,75,6.13,90,6.23,110,6.32,120,6.26,135,6,150,5.45,152,5.357056
12,40.2,5.590498,52,6.11,60,6.25,75,6.37,90,6.53,110,6.65,120,6.6,135,6.4,150,6.07,159.5,5.754414
14,39.3,5.763464,52,6.28,60,6.42,75,6.57,90,6.69,110,6.95,120,6.91,135,6.71,150,6.42,173.9,5.963767
16,38.7,5.830116,52,6.37,60,6.54,75,6.74,90,6.83,110,7.23,120,7.23,135,7.03,150,6.71,179,6.30096
20,38.5,5.852226,52,6.42,60,6.63,75,6.98,90,7.2,110,7.54,120,7.75,135,7.66,150,7.31,179,6.851043

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.41	4.65	4.82	4.75	4.78	4.65	4.26	3.68
8	5.21	5.49	5.68	5.67	5.8	5.67	5.21	4.62
10	5.8	5.99	6.13	6.23	6.32	6.26	6	5.45
12	6.11	6.25	6.37	6.53	6.65	6.6	6.4	6.07
14	6.28	6.42	6.57	6.69	6.95	6.91	6.71	6.42
16	6.37	6.54	6.74	6.83	7.23	7.23	7.03	6.71
20	6.42	6.63	6.98	7.2	7.54	7.75	7.66	7.31

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	2.9	147.8°	3.19
8	41.4°	3.45	152°	4.01
10	42°	3.9	152°	4.73
12	40.2°	4.27	159.5°	5.39
14	39.3°	4.46	173.9°	5.93
16	38.7°	4.55	179°	6.3
20	38.5°	4.58	179°	6.85

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