SEA STAR — ORC Rating

GPH

662.7

OSN

638.6

LOA

11.906 m

Displacement

8261 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5995

Medium

0.8374

High

0.9919

Triple Offshore

Low

0.7723

Medium

1.0304

High

1.1731

Boat Specifications

Dimensions

Length overall: 11.906 m
Beam: 3.65 m
Draft: 2.05 m
Displacement: 8261 kg
Crew weight: 680 kg
Wetted surface: 33.07 m²

Sails

Mainsail: 34.64 m²
Genoa: 36.73 m²
Spinnaker: 119.43 m²
Asymmetric spinnaker: 0 m²

Design

Type: Cal 39-2
Builder: Cal yachts
Designer: Lapworth
Year built: 1977
Stability index: 129

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.

6,43.8,4.22578,52,4.69,60,4.95,75,5.1,90,5.17,110,5.34,120,5.21,135,4.71,145.7,4.164153,150,3.97
8,41.8,5.043757,52,5.62,60,5.87,75,6.04,90,6.25,110,6.46,120,6.35,135,5.86,149.6,5.089774,150,5.07
10,40.6,5.636984,52,6.29,60,6.52,75,6.68,90,6.94,110,7.13,120,7.07,135,6.74,150,6.04,150.7,5.99723
12,39.6,6.086852,52,6.74,60,6.92,75,7.07,90,7.29,110,7.52,120,7.49,135,7.26,150,6.8,156.8,6.495235
14,38.7,6.368281,52,7.01,60,7.17,75,7.33,90,7.46,110,7.82,120,7.83,135,7.63,150,7.27,166.4,6.738954
16,38.2,6.489731,52,7.17,60,7.34,75,7.53,90,7.58,110,8.07,120,8.14,135,7.97,150,7.61,176.3,7.064726
20,37.8,6.555676,52,7.29,60,7.5,75,7.81,90,7.95,110,8.38,120,8.68,135,8.64,150,8.24,179,7.731177

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.69	4.95	5.1	5.17	5.34	5.21	4.71	3.97
8	5.62	5.87	6.04	6.25	6.46	6.35	5.86	5.07
10	6.29	6.52	6.68	6.94	7.13	7.07	6.74	6.04
12	6.74	6.92	7.07	7.29	7.52	7.49	7.26	6.8
14	7.01	7.17	7.33	7.46	7.82	7.83	7.63	7.27
16	7.17	7.34	7.53	7.58	8.07	8.14	7.97	7.61
20	7.29	7.5	7.81	7.95	8.38	8.68	8.64	8.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.8°	3.05	145.7°	3.44
8	41.8°	3.76	149.6°	4.39
10	40.6°	4.28	150.7°	5.23
12	39.6°	4.69	156.8°	5.97
14	38.7°	4.97	166.4°	6.55
16	38.2°	5.1	176.3°	7.05
20	37.8°	5.18	179°	7.73

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