UMI — ORC Rating | RegattaPages

GPH

663.7

OSN

643.7

LOA

9.61 m

Displacement

4001 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6174

Medium

0.8318

High

0.947

Triple Offshore

Low

0.7926

Medium

1.0205

High

1.1323

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.94 m
Displacement: 4001 kg
Crew weight: 350 kg
Wetted surface: 21.98 m²

Sails

Mainsail: 26.36 m²
Genoa: 31.63 m²
Spinnaker: 64.1 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT
Year built: 1998
Stability index: 109.8

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.

6,42.4,4.550038,52,5.09,60,5.33,75,5.5,90,5.39,110,5.22,120,5.06,135,4.55,145.2,4.043114,150,3.84
8,40.6,5.334062,52,5.96,60,6.18,75,6.33,90,6.28,110,6.3,120,6.17,135,5.65,149.6,4.939052,150,4.92
10,39.3,5.802231,52,6.46,60,6.64,75,6.79,90,6.8,110,6.92,120,6.85,135,6.49,150,5.84,153.2,5.680126
12,38.8,6.005097,52,6.68,60,6.88,75,7.06,90,7.12,110,7.31,120,7.28,135,7.01,150,6.56,158.2,6.214419
14,38.4,6.086564,52,6.78,60,6.98,75,7.25,90,7.37,110,7.64,120,7.67,135,7.42,150,7.03,170,6.468268
16,38.4,6.137604,52,6.83,60,7.04,75,7.36,90,7.59,110,7.89,120,8.02,135,7.83,150,7.41,177.2,6.8682
20,38.8,6.146242,52,6.86,60,7.09,75,7.47,90,7.88,110,8.22,120,8.61,135,8.69,150,8.2,178.1,7.594175

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.09	5.33	5.5	5.39	5.22	5.06	4.55	3.84
8	5.96	6.18	6.33	6.28	6.3	6.17	5.65	4.92
10	6.46	6.64	6.79	6.8	6.92	6.85	6.49	5.84
12	6.68	6.88	7.06	7.12	7.31	7.28	7.01	6.56
14	6.78	6.98	7.25	7.37	7.64	7.67	7.42	7.03
16	6.83	7.04	7.36	7.59	7.89	8.02	7.83	7.41
20	6.86	7.09	7.47	7.88	8.22	8.61	8.69	8.2

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.36	145.2°	3.32
8	40.6°	4.05	149.6°	4.26
10	39.3°	4.49	153.2°	5.07
12	38.8°	4.68	158.2°	5.77
14	38.4°	4.77	170°	6.37
16	38.4°	4.81	177.2°	6.86
20	38.8°	4.79	178.1°	7.59

Loading polar chart…