JOY IV — ORC Rating | RegattaPages

GPH

661.9

OSN

641.9

LOA

9.85 m

Displacement

3861 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6085

Medium

0.835

High

0.9631

Triple Offshore

Low

0.7861

Medium

1.026

High

1.1522

Boat Specifications

Dimensions

Length overall: 9.85 m
Beam: 3.21 m
Draft: 1.94 m
Displacement: 3861 kg
Crew weight: 586 kg
Wetted surface: 22.2 m²

Sails

Mainsail: 26.41 m²
Genoa: 30.34 m²
Spinnaker: 62.37 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7 LR
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.

6,42.8,4.456681,52,4.99,60,5.27,75,5.48,90,5.41,110,5.23,120,5.07,135,4.57,146,4.028768,150,3.85
8,40.9,5.212651,52,5.9,60,6.18,75,6.39,90,6.36,110,6.35,120,6.18,135,5.63,150,4.89593
10,40.5,5.878439,52,6.5,60,6.68,75,6.83,90,6.86,110,6.95,120,6.86,135,6.51,150,5.8,152,5.696827
12,38.8,6.159074,52,6.78,60,6.94,75,7.09,90,7.17,110,7.33,120,7.26,135,6.99,150,6.55,157,6.246572
14,37.9,6.235077,52,6.9,60,7.08,75,7.31,90,7.4,110,7.72,120,7.66,135,7.36,150,6.99,180,6.37
16,37.9,6.298442,52,6.95,60,7.14,75,7.47,90,7.67,110,8.08,120,8.1,135,7.77,150,7.33,180,6.86
20,38.2,6.273407,52,6.96,60,7.18,75,7.6,90,8.09,110,8.51,120,8.94,135,8.72,150,8.12,180,7.54

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.99	5.27	5.48	5.41	5.23	5.07	4.57	3.85
8	5.9	6.18	6.39	6.36	6.35	6.18	5.63	4.89
10	6.5	6.68	6.83	6.86	6.95	6.86	6.51	5.8
12	6.78	6.94	7.09	7.17	7.33	7.26	6.99	6.55
14	6.9	7.08	7.31	7.4	7.72	7.66	7.36	6.99
16	6.95	7.14	7.47	7.67	8.08	8.1	7.77	7.33
20	6.96	7.18	7.6	8.09	8.51	8.94	8.72	8.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.27	146°	3.34
8	40.9°	3.94	150°	4.24
10	40.5°	4.47	152°	5.03
12	38.8°	4.8	157°	5.75
14	37.9°	4.92	180°	6.37
16	37.9°	4.97	180°	6.86
20	38.2°	4.93	180°	7.54

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