SKYBIRD — ORC Rating | RegattaPages

GPH

708.5

OSN

685.7

LOA

9.86 m

Displacement

4600 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5711

Medium

0.7818

High

0.9039

Triple Offshore

Low

0.735

Medium

0.9593

High

1.0725

Boat Specifications

Dimensions

Length overall: 9.86 m
Beam: 3.21 m
Draft: 1.82 m
Displacement: 4600 kg
Crew weight: 320 kg
Wetted surface: 20.76 m²

Sails

Mainsail: 27.77 m²
Genoa: 32.25 m²
Spinnaker: 60.38 m²
Asymmetric spinnaker: 0 m²

Design

Type: SIGMA 33
Builder: MARINE PROJECTS
Designer: D.THOMAS
Year built: 1982
Stability index: 134.8

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.

6,43.9,4.288384,52,4.7,60,4.94,75,5.09,90,5,110,4.88,120,4.71,135,4.2,146.9,3.688589,150,3.56
8,41.4,4.972597,52,5.55,60,5.78,75,5.93,90,5.88,110,5.92,120,5.77,135,5.24,150,4.59,151.1,4.546158
10,40.5,5.483913,52,6.07,60,6.25,75,6.39,90,6.41,110,6.51,120,6.43,135,6.08,150,5.47,153.2,5.321617
12,40,5.7699,52,6.35,60,6.51,75,6.66,90,6.74,110,6.87,120,6.81,135,6.57,150,6.17,159.5,5.818471
14,39.4,5.888187,52,6.49,60,6.66,75,6.85,90,6.95,110,7.15,120,7.11,135,6.91,150,6.6,173,6.085359
16,39,5.944829,52,6.57,60,6.75,75,7,90,7.11,110,7.41,120,7.39,135,7.21,150,6.92,179,6.490989
20,39,5.9963,52,6.63,60,6.84,75,7.18,90,7.41,110,7.78,120,7.93,135,7.81,150,7.48,179,7.09108

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.7	4.94	5.09	5	4.88	4.71	4.2	3.56
8	5.55	5.78	5.93	5.88	5.92	5.77	5.24	4.59
10	6.07	6.25	6.39	6.41	6.51	6.43	6.08	5.47
12	6.35	6.51	6.66	6.74	6.87	6.81	6.57	6.17
14	6.49	6.66	6.85	6.95	7.15	7.11	6.91	6.6
16	6.57	6.75	7	7.11	7.41	7.39	7.21	6.92
20	6.63	6.84	7.18	7.41	7.78	7.93	7.81	7.48

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.9°	3.09	146.9°	3.09
8	41.4°	3.73	151.1°	3.98
10	40.5°	4.17	153.2°	4.75
12	40°	4.42	159.5°	5.45
14	39.4°	4.55	173°	6.04
16	39°	4.62	179°	6.49
20	39°	4.66	179°	7.09

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