ADRA — ORC Rating | RegattaPages

GPH

671.7

OSN

650.3

LOA

9.49 m

Displacement

3830 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6747

Medium

0.9275

High

1.0694

Triple Offshore

Low

0.8679

Medium

1.1398

High

1.2777

Boat Specifications

Dimensions

Length overall: 9.49 m
Beam: 3.22 m
Draft: 1.93 m
Displacement: 3830 kg
Crew weight: 470 kg
Wetted surface: 22.23 m²

Sails

Mainsail: 25.94 m²
Genoa: 28.06 m²
Spinnaker: 61.13 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT
Year built: 1998

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.

6,42.3,4.312961,52,4.83,60,5.08,75,5.27,90,5.21,110,5.16,120,5,135,4.52,146.4,3.973965,150,3.83
8,40.7,5.091446,52,5.75,60,6.02,75,6.21,90,6.18,110,6.27,120,6.11,135,5.57,150,4.86,150.5,4.837103
10,40.1,5.739152,52,6.4,60,6.59,75,6.73,90,6.81,110,6.89,120,6.8,135,6.44,150,5.75,152.3,5.635911
12,39,6.073505,52,6.7,60,6.86,75,7.01,90,7.1,110,7.27,120,7.19,135,6.93,150,6.5,157.3,6.189446
14,38.3,6.15462,52,6.81,60,6.99,75,7.21,90,7.3,110,7.63,120,7.58,135,7.29,150,6.94,180,6.33
16,38.1,6.188567,52,6.86,60,7.05,75,7.36,90,7.55,110,7.94,120,8,135,7.68,150,7.27,180,6.81
20,38.6,6.205852,52,6.86,60,7.08,75,7.47,90,7.93,110,8.32,120,8.74,135,8.6,150,8.04,180,7.48

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.83	5.08	5.27	5.21	5.16	5	4.52	3.83
8	5.75	6.02	6.21	6.18	6.27	6.11	5.57	4.86
10	6.4	6.59	6.73	6.81	6.89	6.8	6.44	5.75
12	6.7	6.86	7.01	7.1	7.27	7.19	6.93	6.5
14	6.81	6.99	7.21	7.3	7.63	7.58	7.29	6.94
16	6.86	7.05	7.36	7.55	7.94	8	7.68	7.27
20	6.86	7.08	7.47	7.93	8.32	8.74	8.6	8.04

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.3°	3.19	146.4°	3.31
8	40.7°	3.86	150.5°	4.21
10	40.1°	4.39	152.3°	4.99
12	39°	4.72	157.3°	5.71
14	38.3°	4.83	180°	6.33
16	38.1°	4.87	180°	6.81
20	38.6°	4.85	180°	7.48

Loading polar chart…