Arethusa — ORC Rating

GPH

617.2

OSN

599.1

LOA

10.757 m

Displacement

5208 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6631

Medium

0.892

High

1.0106

Triple Offshore

Low

0.8532

Medium

1.0963

High

1.2185

Boat Specifications

Dimensions

Length overall: 10.757 m
Beam: 3.52 m
Draft: 2.14 m
Displacement: 5208 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
Stability index: 117.2

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.

6,42.9,4.641366,52,5.2,60,5.5,75,5.73,90,5.78,110,5.87,120,5.72,135,5.18,144.8,4.687051,150,4.42
8,41.2,5.488993,52,6.19,60,6.48,75,6.69,90,6.87,110,6.99,120,6.88,135,6.4,147.8,5.672464,150,5.54
10,40.5,6.207211,52,6.84,60,7.03,75,7.17,90,7.34,110,7.51,120,7.45,135,7.18,148.8,6.593682,150,6.51
12,38.7,6.496415,52,7.14,60,7.3,75,7.45,90,7.53,110,7.91,120,7.9,135,7.63,150,7.13,150.5,7.089056
14,37.8,6.580987,52,7.26,60,7.45,75,7.68,90,7.76,110,8.22,120,8.38,135,8.1,150,7.46,152.9,7.279158
16,37.6,6.651608,52,7.32,60,7.52,75,7.86,90,8.05,110,8.46,120,8.81,135,8.61,150,7.76,174.5,7.022329
20,37,6.749011,52,7.4,60,7.59,75,8.02,90,8.49,110,8.9,120,9.4,135,9.83,150,8.47,176.6,7.693542

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.2	5.5	5.73	5.78	5.87	5.72	5.18	4.42
8	6.19	6.48	6.69	6.87	6.99	6.88	6.4	5.54
10	6.84	7.03	7.17	7.34	7.51	7.45	7.18	6.51
12	7.14	7.3	7.45	7.53	7.91	7.9	7.63	7.13
14	7.26	7.45	7.68	7.76	8.22	8.38	8.1	7.46
16	7.32	7.52	7.86	8.05	8.46	8.81	8.61	7.76
20	7.4	7.59	8.02	8.49	8.9	9.4	9.83	8.47

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.4	144.8°	3.83
8	41.2°	4.13	147.8°	4.8
10	40.5°	4.72	148.8°	5.64
12	38.7°	5.07	150.5°	6.17
14	37.8°	5.2	152.9°	6.48
16	37.6°	5.27	174.5°	6.99
20	37°	5.39	176.6°	7.68

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