Westerly — ORC Rating

GPH

446.1

OSN

437.5

LOA

20.726 m

Displacement

10166 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.9943

Medium

1.34

High

1.5598

Triple Offshore

Low

1.3182

Medium

1.707

High

1.9497

Boat Specifications

Dimensions

Length overall: 20.726 m
Beam: 4.6 m
Draft: 3.08 m
Displacement: 10166 kg
Crew weight: 1588 kg
Wetted surface: 52.18 m²

Sails

Mainsail: 99.56 m²
Genoa: 108 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 247.15 m²

Design

Type: Santa Cruz 70
Builder: Lee / Santa Cruz
Designer: Bill Lee
Year built: 1987

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.

6,45.8,6.999777,52,7.68,60,8.32,75,8.95,90,8.92,110,7.89,120,7.29,135,6.51,141,6.022035,150,5.41
8,43.2,7.997601,52,8.98,60,9.55,75,10.06,90,10.16,110,9.6,120,9.3,135,8.44,141.2,7.814325,150,7.03
10,42.3,8.558321,52,9.55,60,9.99,75,10.57,90,10.94,110,10.45,120,10.42,135,9.9,144.5,9.089619,150,8.55
12,41.3,8.825125,52,9.83,60,10.24,75,10.95,90,11.52,110,11.35,120,11.4,135,10.91,150,9.69,150.1,9.6782
14,40.9,8.956762,52,9.98,60,10.41,75,11.21,90,11.92,110,12.2,120,12.07,135,12.04,150,10.69,154.5,10.181863
16,40.6,9.021808,52,10.01,60,10.5,75,11.41,90,12.22,110,12.99,120,12.87,135,13.2,149.9,11.604905,150,11.59
20,41,9.261841,52,10.25,60,10.84,75,11.68,90,12.62,110,14.18,120,14.48,135,15.39,146.5,14.738229,150,14.19

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	7.68	8.32	8.95	8.92	7.89	7.29	6.51	5.41
8	8.98	9.55	10.06	10.16	9.6	9.3	8.44	7.03
10	9.55	9.99	10.57	10.94	10.45	10.42	9.9	8.55
12	9.83	10.24	10.95	11.52	11.35	11.4	10.91	9.69
14	9.98	10.41	11.21	11.92	12.2	12.07	12.04	10.69
16	10.01	10.5	11.41	12.22	12.99	12.87	13.2	11.59
20	10.25	10.84	11.68	12.62	14.18	14.48	15.39	14.19

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45.8°	4.88	141°	4.68
8	43.2°	5.83	141.2°	6.09
10	42.3°	6.33	144.5°	7.4
12	41.3°	6.63	150.1°	8.39
14	40.9°	6.77	154.5°	9.19
16	40.6°	6.85	149.9°	10.04
20	41°	6.99	146.5°	12.29

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