GOTCHA — ORC Rating | RegattaPages

GPH

749

OSN

726

LOA

8.47 m

Displacement

3269 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6095

Medium

0.8306

High

0.9689

Triple Offshore

Low

0.7818

Medium

1.0192

High

1.1465

Boat Specifications

Dimensions

Length overall: 8.47 m
Beam: 2.79 m
Draft: 1.59 m
Displacement: 3269 kg
Crew weight: 440 kg
Wetted surface: 17.13 m²

Sails

Mainsail: 14.03 m²
Genoa: 23.3 m²
Spinnaker: 54.72 m²
Asymmetric spinnaker: 0 m²

Design

Type: Spirit 28
Builder: van Heygen
Designer: E G vd Stadt
Year built: 1971

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.

6,43.1,3.834764,52,4.27,60,4.49,75,4.64,90,4.62,110,4.74,120,4.61,135,4.21,147.9,3.694864,150,3.61
8,41.3,4.44584,52,5.03,60,5.29,75,5.47,90,5.58,110,5.73,120,5.61,135,5.14,150,4.52,152,4.439675
10,41.3,5.004898,52,5.6,60,5.81,75,5.96,90,6.12,110,6.23,120,6.17,135,5.93,150,5.34,151.1,5.288621
12,40.6,5.413085,52,5.92,60,6.07,75,6.2,90,6.38,110,6.52,120,6.48,135,6.3,150,5.98,160.1,5.625935
14,39.4,5.590543,52,6.1,60,6.24,75,6.38,90,6.5,110,6.8,120,6.78,135,6.59,150,6.31,180,5.85
16,38.8,5.645818,52,6.2,60,6.36,75,6.53,90,6.6,110,7.06,120,7.09,135,6.89,150,6.57,180,6.21
20,39.1,5.669764,52,6.24,60,6.44,75,6.76,90,6.94,110,7.33,120,7.6,135,7.52,150,7.14,180,6.73

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.27	4.49	4.64	4.62	4.74	4.61	4.21	3.61
8	5.03	5.29	5.47	5.58	5.73	5.61	5.14	4.52
10	5.6	5.81	5.96	6.12	6.23	6.17	5.93	5.34
12	5.92	6.07	6.2	6.38	6.52	6.48	6.3	5.98
14	6.1	6.24	6.38	6.5	6.8	6.78	6.59	6.31
16	6.2	6.36	6.53	6.6	7.06	7.09	6.89	6.57
20	6.24	6.44	6.76	6.94	7.33	7.6	7.52	7.14

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.1°	2.8	147.9°	3.13
8	41.3°	3.34	152°	3.92
10	41.3°	3.76	151.1°	4.63
12	40.6°	4.11	160.1°	5.29
14	39.4°	4.32	180°	5.85
16	38.8°	4.4	180°	6.21
20	39.1°	4.4	180°	6.73

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