Blue Skies — ORC Rating

GPH

600.5

OSN

580.9

LOA

15.54 m

Displacement

19422 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6493

Medium

0.9071

High

1.0774

Triple Offshore

Low

0.8467

Medium

1.1398

High

1.3039

Boat Specifications

Dimensions

Length overall: 15.54 m
Beam: 4.33 m
Draft: 2.2 m
Displacement: 19422 kg
Crew weight: 1088 kg
Wetted surface: 55.55 m²

Sails

Mainsail: 47.17 m²
Genoa: 78.32 m²
Spinnaker: 158.74 m²
Asymmetric spinnaker: 152.96 m²

Design

Type: Alden Skye 51
Builder: Mao Ta
Designer: Kaufman
Year built: 1980

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.

6,45.5,4.779506,52,5.23,60,5.6,75,5.85,90,5.75,110,5.86,120,5.69,135,5.06,140,4.777791,150,4.22
8,43.4,5.725495,52,6.33,60,6.66,75,6.9,90,6.98,110,7.14,120,6.95,135,6.33,144.7,5.722074,150,5.39
10,41.9,6.408607,52,7.12,60,7.42,75,7.64,90,7.83,110,7.99,120,7.87,135,7.34,146.6,6.611983,150,6.37
12,41,6.890068,52,7.65,60,7.89,75,8.09,90,8.32,110,8.46,120,8.4,135,8.06,150,7.24,150.3,7.218251
14,40.9,7.223622,52,7.94,60,8.17,75,8.4,90,8.6,110,8.78,120,8.77,135,8.51,150,7.92,154.1,7.670436
16,40.3,7.368865,52,8.11,60,8.34,75,8.6,90,8.8,110,9.04,120,9.08,135,8.85,150,8.37,158.9,7.953236
20,39.6,7.501493,52,8.26,60,8.49,75,8.81,90,9.12,110,9.43,120,9.61,135,9.47,150,9.01,176.8,8.292931
24,39.4,7.557585,52,8.33,60,8.58,75,8.95,90,9.32,110,9.8,120,9.96,135,10.07,150,9.61,178.1,8.884885

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.23	5.6	5.85	5.75	5.86	5.69	5.06	4.22
8	6.33	6.66	6.9	6.98	7.14	6.95	6.33	5.39
10	7.12	7.42	7.64	7.83	7.99	7.87	7.34	6.37
12	7.65	7.89	8.09	8.32	8.46	8.4	8.06	7.24
14	7.94	8.17	8.4	8.6	8.78	8.77	8.51	7.92
16	8.11	8.34	8.6	8.8	9.04	9.08	8.85	8.37
20	8.26	8.49	8.81	9.12	9.43	9.61	9.47	9.01
24	8.33	8.58	8.95	9.32	9.8	9.96	10.07	9.61

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45.5°	3.35	140°	3.66
8	43.4°	4.16	144.7°	4.67
10	41.9°	4.77	146.6°	5.52
12	41°	5.2	150.3°	6.27
14	40.9°	5.46	154.1°	6.9
16	40.3°	5.62	158.9°	7.42
20	39.6°	5.78	176.8°	8.28
24	39.4°	5.84	178.1°	8.88

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