GOTCHA — ORC Rating | RegattaPages

GPH

752.7

OSN

728.2

LOA

8.47 m

Displacement

3269 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6064

Medium

0.8274

High

0.9661

Triple Offshore

Low

0.7753

Medium

1.0155

High

1.1444

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.

6,42.4,3.764615,52,4.19,60,4.39,75,4.55,90,4.57,110,4.71,120,4.58,135,4.19,148.1,3.675034,150,3.61
8,40.9,4.392386,52,4.93,60,5.16,75,5.35,90,5.55,110,5.7,120,5.58,135,5.12,150,4.52,152.1,4.435565
10,40.9,4.921589,52,5.55,60,5.76,75,5.91,90,6.12,110,6.22,120,6.16,135,5.92,150,5.33,151.4,5.273451
12,40.8,5.402941,52,5.92,60,6.06,75,6.18,90,6.38,110,6.52,120,6.47,135,6.3,150,5.98,160.2,5.622391
14,39.6,5.580696,52,6.1,60,6.24,75,6.38,90,6.5,110,6.8,120,6.78,135,6.58,150,6.31,180,5.85
16,39.1,5.643992,52,6.2,60,6.35,75,6.53,90,6.59,110,7.06,120,7.09,135,6.88,150,6.57,180,6.21
20,40,5.717684,52,6.23,60,6.43,75,6.76,90,6.94,110,7.31,120,7.6,135,7.51,150,7.14,180,6.73

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.19	4.39	4.55	4.57	4.71	4.58	4.19	3.61
8	4.93	5.16	5.35	5.55	5.7	5.58	5.12	4.52
10	5.55	5.76	5.91	6.12	6.22	6.16	5.92	5.33
12	5.92	6.06	6.18	6.38	6.52	6.47	6.3	5.98
14	6.1	6.24	6.38	6.5	6.8	6.78	6.58	6.31
16	6.2	6.35	6.53	6.59	7.06	7.09	6.88	6.57
20	6.23	6.43	6.76	6.94	7.31	7.6	7.51	7.14

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	2.78	148.1°	3.12
8	40.9°	3.32	152.1°	3.92
10	40.9°	3.72	151.4°	4.63
12	40.8°	4.09	160.2°	5.29
14	39.6°	4.3	180°	5.85
16	39.1°	4.38	180°	6.21
20	40°	4.38	180°	6.73

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