ADRA — ORC Rating | RegattaPages

GPH

675.3

OSN

652.2

LOA

9.61 m

Displacement

3845 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5957

Medium

0.821

High

0.9473

Triple Offshore

Low

0.7662

Medium

1.0087

High

1.1325

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.94 m
Displacement: 3845 kg
Crew weight: 380 kg
Wetted surface: 21.69 m²

Sails

Mainsail: 25.06 m²
Genoa: 25.7 m²
Spinnaker: 61.39 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT
Year built: 1998
Stability index: 111.8

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.

6,43,4.348101,52,4.84,60,5.09,75,5.25,90,5.12,110,5.14,120,4.97,135,4.45,145.7,3.922051,150,3.75
8,40.8,5.125529,52,5.74,60,5.97,75,6.13,90,6.1,110,6.23,120,6.09,135,5.55,149.6,4.8463,150,4.83
10,39.4,5.668189,52,6.33,60,6.51,75,6.66,90,6.74,110,6.88,120,6.8,135,6.41,150,5.75,152.3,5.635911
12,38.7,5.983878,52,6.65,60,6.82,75,6.98,90,7.06,110,7.28,120,7.23,135,6.96,150,6.49,157.7,6.160765
14,38.2,6.095257,52,6.8,60,6.99,75,7.21,90,7.28,110,7.63,120,7.62,135,7.36,150,6.97,169.4,6.409374
16,38.2,6.158882,52,6.86,60,7.07,75,7.37,90,7.52,110,7.92,120,7.99,135,7.77,150,7.35,177.2,6.808128
20,38.7,6.201706,52,6.9,60,7.13,75,7.54,90,7.89,110,8.27,120,8.66,135,8.61,150,8.12,178.1,7.534142

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.84	5.09	5.25	5.12	5.14	4.97	4.45	3.75
8	5.74	5.97	6.13	6.1	6.23	6.09	5.55	4.83
10	6.33	6.51	6.66	6.74	6.88	6.8	6.41	5.75
12	6.65	6.82	6.98	7.06	7.28	7.23	6.96	6.49
14	6.8	6.99	7.21	7.28	7.63	7.62	7.36	6.97
16	6.86	7.07	7.37	7.52	7.92	7.99	7.77	7.35
20	6.9	7.13	7.54	7.89	8.27	8.66	8.61	8.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.18	145.7°	3.24
8	40.8°	3.88	149.6°	4.18
10	39.4°	4.38	152.3°	4.99
12	38.7°	4.67	157.7°	5.7
14	38.2°	4.79	169.4°	6.3
16	38.2°	4.84	177.2°	6.8
20	38.7°	4.84	178.1°	7.53

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