Cirrus III — ORC Rating

GPH

714.6

OSN

693.2

LOA

9.684 m

Displacement

3937 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5676

Medium

0.772

High

0.8956

Triple Offshore

Low

0.7304

Medium

0.949

High

1.0625

Boat Specifications

Dimensions

Length overall: 9.684 m
Beam: 2.74 m
Draft: 1.49 m
Displacement: 3937 kg
Crew weight: 459 kg
Wetted surface: 18.71 m²

Sails

Mainsail: 18.2 m²
Genoa: 31.92 m²
Spinnaker: 67.85 m²
Asymmetric spinnaker: 0 m²

Design

Type: Selecta 31
Builder: Van de Stadt
Designer: Van de Stadt
Year built: 1970
Stability index: 113.6

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.

6,43.8,4.08723,52,4.52,60,4.8,75,5,90,4.93,110,4.95,120,4.8,135,4.39,147.8,3.852548,150,3.77
8,42.4,4.753165,52,5.33,60,5.64,75,5.86,90,5.81,110,5.98,120,5.87,135,5.37,150,4.72,152,4.632212
10,43,5.414617,52,5.95,60,6.16,75,6.32,90,6.38,110,6.51,120,6.45,135,6.2,150,5.6,150.2,5.589068
12,41.7,5.759148,52,6.27,60,6.43,75,6.56,90,6.64,110,6.82,120,6.79,135,6.6,150,6.27,158.6,5.960975
14,40.6,5.874053,52,6.42,60,6.58,75,6.75,90,6.78,110,7.1,120,7.1,135,6.91,150,6.62,172.7,6.139766
16,40.2,5.957088,52,6.49,60,6.67,75,6.9,90,6.98,110,7.33,120,7.42,135,7.24,150,6.9,178.1,6.473559
20,40,6.017928,52,6.55,60,6.75,75,7.09,90,7.32,110,7.6,120,7.88,135,7.88,150,7.52,179,7.021069

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.52	4.8	5	4.93	4.95	4.8	4.39	3.77
8	5.33	5.64	5.86	5.81	5.98	5.87	5.37	4.72
10	5.95	6.16	6.32	6.38	6.51	6.45	6.2	5.6
12	6.27	6.43	6.56	6.64	6.82	6.79	6.6	6.27
14	6.42	6.58	6.75	6.78	7.1	7.1	6.91	6.62
16	6.49	6.67	6.9	6.98	7.33	7.42	7.24	6.9
20	6.55	6.75	7.09	7.32	7.6	7.88	7.88	7.52

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.8°	2.95	147.8°	3.26
8	42.4°	3.51	152°	4.09
10	43°	3.96	150.2°	4.85
12	41.7°	4.3	158.6°	5.55
14	40.6°	4.46	172.7°	6.09
16	40.2°	4.55	178.1°	6.47
20	40°	4.61	179°	7.02

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