GRUMÉ — ORC Rating | RegattaPages

GPH

731.2

OSN

705.8

LOA

8.43 m

Displacement

2821 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5462

Medium

0.7595

High

0.8832

Triple Offshore

Low

0.7049

Medium

0.9326

High

1.0531

Boat Specifications

Dimensions

Length overall: 8.43 m
Beam: 3.02 m
Draft: 1.58 m
Displacement: 2821 kg
Crew weight: 420 kg
Wetted surface: 17.68 m²

Sails

Mainsail: 20.43 m²
Genoa: 22.97 m²
Spinnaker: 49.97 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 285 Q.B.
Builder: Beneteau
Designer: Finot
Year built: 1989
Stability index: 124.3

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.

6,44.8,4.030606,52,4.41,60,4.67,75,4.83,90,4.73,110,4.77,120,4.62,135,4.12,146.9,3.628903,150,3.51
8,42.6,4.754808,52,5.28,60,5.53,75,5.7,90,5.68,110,5.79,120,5.65,135,5.16,150,4.52,150.7,4.483589
10,41.2,5.263054,52,5.82,60,6.02,75,6.16,90,6.26,110,6.36,120,6.28,135,5.97,150,5.39,153.3,5.238583
12,39.6,5.554739,52,6.13,60,6.29,75,6.44,90,6.58,110,6.73,120,6.67,135,6.43,150,6.06,160.4,5.689674
14,38.8,5.709975,52,6.31,60,6.47,75,6.66,90,6.81,110,7.06,120,7.02,135,6.78,150,6.46,173.6,5.957125
16,38.7,5.791676,52,6.41,60,6.6,75,6.85,90,6.95,110,7.36,120,7.36,135,7.13,150,6.79,179,6.340966
20,39.9,5.878786,52,6.46,60,6.69,75,7.09,90,7.34,110,7.85,120,8.03,135,7.87,150,7.45,179,6.971062

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.41	4.67	4.83	4.73	4.77	4.62	4.12	3.51
8	5.28	5.53	5.7	5.68	5.79	5.65	5.16	4.52
10	5.82	6.02	6.16	6.26	6.36	6.28	5.97	5.39
12	6.13	6.29	6.44	6.58	6.73	6.67	6.43	6.06
14	6.31	6.47	6.66	6.81	7.06	7.02	6.78	6.46
16	6.41	6.6	6.85	6.95	7.36	7.36	7.13	6.79
20	6.46	6.69	7.09	7.34	7.85	8.03	7.87	7.45

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.8°	2.86	146.9°	3.04
8	42.6°	3.5	150.7°	3.91
10	41.2°	3.96	153.3°	4.68
12	39.6°	4.28	160.4°	5.36
14	38.8°	4.45	173.6°	5.92
16	38.7°	4.52	179°	6.34
20	39.9°	4.51	179°	6.97

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