GEMMA: ORC Rating

GPH

731.4

OSN

709.7

LOA

7.597 m

Displacement

1854 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5745

Medium

0.767

High

0.8662

Triple Offshore

Low

0.7321

Medium

0.9185

High

1.0152

Boat Specifications

Dimensions

Length overall: 7.597 m
Beam: 2.69 m
Draft: 1.56 m
Displacement: 1854 kg
Crew weight: 425 kg
Wetted surface: 13.08 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

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,42.4,4.238577,52,4.7,60,4.9,75,5,90,4.95,110,4.92,120,4.74,135,4.26,146.6,3.737208,150,3.61
8,40.6,4.899434,52,5.42,60,5.56,75,5.63,90,5.71,110,5.7,120,5.58,135,5.17,150,4.57,151.8,4.493344
10,38.2,5.242685,52,5.75,60,5.85,75,5.95,90,6.07,110,6.1,120,6.01,135,5.77,150,5.34,156.5,5.103264
12,36.6,5.418417,52,5.93,60,6.04,75,6.15,90,6.3,110,6.4,120,6.32,135,6.11,150,5.83,171.2,5.363133
14,36.3,5.509175,52,6.04,60,6.17,75,6.32,90,6.49,110,6.69,120,6.62,135,6.4,150,6.15,179,5.770879
16,36.1,5.544624,52,6.1,60,6.25,75,6.47,90,6.62,110,7.01,120,6.97,135,6.71,150,6.42,179.4,6.090334
20,36.5,5.598012,52,6.16,60,6.34,75,6.66,90,6.96,110,7.57,120,7.78,135,7.52,150,7.06,179.4,6.620363
24,37.9,5.614104,52,6.17,60,6.38,75,6.78,90,7.22,110,7.93,120,8.58,135,8.72,150,7.94,178.4,7.282839

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.7	4.9	5	4.95	4.92	4.74	4.26	3.61
8	5.42	5.56	5.63	5.71	5.7	5.58	5.17	4.57
10	5.75	5.85	5.95	6.07	6.1	6.01	5.77	5.34
12	5.93	6.04	6.15	6.3	6.4	6.32	6.11	5.83
14	6.04	6.17	6.32	6.49	6.69	6.62	6.4	6.15
16	6.1	6.25	6.47	6.62	7.01	6.97	6.71	6.42
20	6.16	6.34	6.66	6.96	7.57	7.78	7.52	7.06
24	6.17	6.38	6.78	7.22	7.93	8.58	8.72	7.94

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.13	146.6°	3.12
8	40.6°	3.72	151.8°	3.96
10	38.2°	4.12	156.5°	4.68
12	36.6°	4.35	171.2°	5.3
14	36.3°	4.44	179°	5.77
16	36.1°	4.48	179.4°	6.09
20	36.5°	4.5	179.4°	6.62
24	37.9°	4.43	178.4°	7.28

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt24 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.70	5.42	5.75	5.93	6.04	6.10	6.16	6.17
60°	4.90	5.56	5.85	6.04	6.17	6.25	6.34	6.38
75°	5.00	5.63	5.95	6.15	6.32	6.47	6.66	6.78
90°	4.95	5.71	6.07	6.30	6.49	6.62	6.96	7.22
110°	4.92	5.70	6.10	6.40	6.69	7.01	7.57	7.93
120°	4.74	5.58	6.01	6.32	6.62	6.97	7.78	8.58
135°	4.26	5.17	5.77	6.11	6.40	6.71	7.52	8.72
150°	3.61	4.57	5.34	5.83	6.15	6.42	7.06	7.94