Arethusa — ORC Rating

GPH

617

OSN

600.1

LOA

10.757 m

Displacement

5209 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6642

Medium

0.8901

High

1.0093

Triple Offshore

Low

0.856

Medium

1.0954

High

1.2155

Boat Specifications

Dimensions

Length overall: 10.757 m
Beam: 3.52 m
Draft: 2.14 m
Displacement: 5209 kg
Crew weight: 641 kg
Wetted surface: 26.4 m²

Sails

Mainsail: 37.76 m²
Genoa: 31 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 107.12 m²

Design

Type: J-109
Builder: J-Boats France
Designer: Johnstone
Year built: 2001

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.

6,42.8,4.688374,52,5.25,60,5.55,75,5.8,90,5.81,110,5.9,120,5.75,135,5.18,144.5,4.679926,150,4.4
8,40.9,5.503712,52,6.22,60,6.51,75,6.73,90,6.89,110,7,120,6.88,135,6.38,148,5.612889,150,5.5
10,40.1,6.183642,52,6.86,60,7.04,75,7.19,90,7.35,110,7.51,120,7.44,135,7.15,148.8,6.535227,150,6.46
12,38.6,6.487354,52,7.14,60,7.31,75,7.47,90,7.53,110,7.9,120,7.88,135,7.59,150,7.08,150.5,7.043097
14,37.9,6.577246,52,7.26,60,7.45,75,7.69,90,7.78,110,8.22,120,8.35,135,8.04,150,7.42,174,6.505639
16,37.9,6.653283,52,7.31,60,7.52,75,7.86,90,8.06,110,8.46,120,8.78,135,8.53,150,7.71,177,7.029634
20,37.5,6.756132,52,7.39,60,7.58,75,8.02,90,8.49,110,8.89,120,9.37,135,9.68,150,8.5,178,7.7147

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.25	5.55	5.8	5.81	5.9	5.75	5.18	4.4
8	6.22	6.51	6.73	6.89	7	6.88	6.38	5.5
10	6.86	7.04	7.19	7.35	7.51	7.44	7.15	6.46
12	7.14	7.31	7.47	7.53	7.9	7.88	7.59	7.08
14	7.26	7.45	7.69	7.78	8.22	8.35	8.04	7.42
16	7.31	7.52	7.86	8.06	8.46	8.78	8.53	7.71
20	7.39	7.58	8.02	8.49	8.89	9.37	9.68	8.5

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.44	144.5°	3.81
8	40.9°	4.16	148°	4.76
10	40.1°	4.73	148.8°	5.59
12	38.6°	5.07	150.5°	6.13
14	37.9°	5.19	174°	6.47
16	37.9°	5.25	177°	7.02
20	37.5°	5.36	178°	7.71

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