GEMMA — ORC Rating | RegattaPages

GPH

725.7

OSN

704.8

LOA

7.6 m

Displacement

1665 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5816

Medium

0.7705

High

0.8677

Triple Offshore

Low

0.7398

Medium

0.9244

High

1.0219

Boat Specifications

Dimensions

Length overall: 7.6 m
Beam: 2.7 m
Draft: 1.56 m
Displacement: 1665 kg
Crew weight: 425 kg
Wetted surface: 12.52 m²

Sails

Mainsail: 20.71 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: 102.5

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.

6,42,4.279112,52,4.76,60,4.96,75,5.06,90,4.99,110,4.96,120,4.78,135,4.3,146.9,3.772149,150,3.65
8,40.5,4.957878,52,5.45,60,5.6,75,5.67,90,5.74,110,5.73,120,5.61,135,5.21,150,4.61,152.3,4.517765
10,38.1,5.273625,52,5.78,60,5.89,75,5.99,90,6.11,110,6.15,120,6.06,135,5.8,150,5.38,157.7,5.090738
12,36.9,5.439644,52,5.96,60,6.08,75,6.21,90,6.36,110,6.48,120,6.39,135,6.16,150,5.87,171.8,5.385056
14,36.6,5.50561,52,6.06,60,6.21,75,6.39,90,6.54,110,6.79,120,6.73,135,6.48,150,6.2,179,5.810885
16,36.6,5.567891,52,6.12,60,6.28,75,6.53,90,6.68,110,7.11,120,7.1,135,6.82,150,6.51,179,6.140935
20,37,5.597046,52,6.18,60,6.37,75,6.7,90,7.04,110,7.65,120,7.98,135,7.71,150,7.19,179,6.731025

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.76	4.96	5.06	4.99	4.96	4.78	4.3	3.65
8	5.45	5.6	5.67	5.74	5.73	5.61	5.21	4.61
10	5.78	5.89	5.99	6.11	6.15	6.06	5.8	5.38
12	5.96	6.08	6.21	6.36	6.48	6.39	6.16	5.87
14	6.06	6.21	6.39	6.54	6.79	6.73	6.48	6.2
16	6.12	6.28	6.53	6.68	7.11	7.1	6.82	6.51
20	6.18	6.37	6.7	7.04	7.65	7.98	7.71	7.19

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.18	146.9°	3.16
8	40.5°	3.77	152.3°	4
10	38.1°	4.15	157.7°	4.71
12	36.9°	4.35	171.8°	5.33
14	36.6°	4.42	179°	5.81
16	36.6°	4.47	179°	6.14
20	37°	4.47	179°	6.73

Loading polar chart…