GEMMA — ORC Rating | RegattaPages

GPH

723.8

OSN

701.6

LOA

7.62 m

Displacement

1700 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5683

Medium

0.7723

High

0.8813

Triple Offshore

Low

0.7294

Medium

0.9328

High

1.041

Boat Specifications

Dimensions

Length overall: 7.62 m
Beam: 2.71 m
Draft: 1.57 m
Displacement: 1700 kg
Crew weight: 425 kg
Wetted surface: 12.67 m²

Sails

Mainsail: 21.07 m²
Genoa: 14.34 m²
Spinnaker: 34.77 m²
Asymmetric spinnaker: 0 m²

Design

Type: POLARIS
Builder: SET
Designer: SET
Year built: 1992
Stability index: 108.9

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.

6,41.8,4.10476,52,4.62,60,4.86,75,5.02,90,4.98,110,4.93,120,4.74,135,4.24,147.5,3.711207,150,3.61
8,41.4,4.879277,52,5.45,60,5.63,75,5.73,90,5.81,110,5.8,120,5.67,135,5.19,150,4.55,152,4.462326
10,39.4,5.344662,52,5.83,60,5.95,75,6.05,90,6.2,110,6.21,120,6.12,135,5.87,150,5.38,153.8,5.227034
12,37.2,5.536515,52,6.05,60,6.17,75,6.3,90,6.52,110,6.59,120,6.48,135,6.23,150,5.93,166.4,5.514625
14,36.4,5.603224,52,6.17,60,6.34,75,6.54,90,6.76,110,6.95,120,6.86,135,6.58,150,6.26,179,5.860893
16,36.3,5.658072,52,6.24,60,6.44,75,6.74,90,6.89,110,7.29,120,7.22,135,6.94,150,6.6,179,6.200944
20,36.6,5.66754,52,6.29,60,6.53,75,6.94,90,7.28,110,7.74,120,7.95,135,7.66,150,7.27,179,6.841042

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.62	4.86	5.02	4.98	4.93	4.74	4.24	3.61
8	5.45	5.63	5.73	5.81	5.8	5.67	5.19	4.55
10	5.83	5.95	6.05	6.2	6.21	6.12	5.87	5.38
12	6.05	6.17	6.3	6.52	6.59	6.48	6.23	5.93
14	6.17	6.34	6.54	6.76	6.95	6.86	6.58	6.26
16	6.24	6.44	6.74	6.89	7.29	7.22	6.94	6.6
20	6.29	6.53	6.94	7.28	7.74	7.95	7.66	7.27

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	3.06	147.5°	3.13
8	41.4°	3.66	152°	3.94
10	39.4°	4.13	153.8°	4.69
12	37.2°	4.41	166.4°	5.36
14	36.4°	4.51	179°	5.86
16	36.3°	4.56	179°	6.2
20	36.6°	4.55	179°	6.84

Loading polar chart…