Arethusa — ORC Rating

GPH

621.4

OSN

605.8

LOA

10.757 m

Displacement

5209 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7529

Medium

0.9907

High

1.1137

Triple Offshore

Low

0.9664

Medium

1.2198

High

1.3394

Boat Specifications

Dimensions

Length overall: 10.757 m
Beam: 3.52 m
Draft: 2.14 m
Displacement: 5209 kg
Crew weight: 180 kg
Wetted surface: 26.47 m²

Sails

Mainsail: 37.87 m²
Genoa: 31.71 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 104.64 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.

6,42,4.723171,52,5.29,60,5.56,75,5.78,90,5.78,110,5.86,120,5.71,135,5.16,144.6,4.661846,150,4.38
8,40.4,5.541415,52,6.28,60,6.54,75,6.73,90,6.84,110,6.96,120,6.85,135,6.34,148.1,5.583225,150,5.48
10,39.9,6.139486,52,6.83,60,7.03,75,7.18,90,7.2,110,7.45,120,7.4,135,7.12,148.8,6.511846,150,6.43
12,39,6.343725,52,7.04,60,7.24,75,7.43,90,7.49,110,7.74,120,7.8,135,7.56,150,7.06,150.3,7.034053
14,38.5,6.427227,52,7.13,60,7.33,75,7.6,90,7.73,110,7.96,120,8.2,135,7.99,150,7.4,174.2,6.483189
16,38.3,6.473182,52,7.18,60,7.38,75,7.7,90,7.95,110,8.17,120,8.48,135,8.46,150,7.69,176.8,7.020947
20,38.6,6.653696,52,7.3,60,7.48,75,7.8,90,8.28,110,8.54,120,8.94,135,9.5,150,8.44,177.9,7.695168

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.29	5.56	5.78	5.78	5.86	5.71	5.16	4.38
8	6.28	6.54	6.73	6.84	6.96	6.85	6.34	5.48
10	6.83	7.03	7.18	7.2	7.45	7.4	7.12	6.43
12	7.04	7.24	7.43	7.49	7.74	7.8	7.56	7.06
14	7.13	7.33	7.6	7.73	7.96	8.2	7.99	7.4
16	7.18	7.38	7.7	7.95	8.17	8.48	8.46	7.69
20	7.3	7.48	7.8	8.28	8.54	8.94	9.5	8.44

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.51	144.6°	3.8
8	40.4°	4.22	148.1°	4.74
10	39.9°	4.71	148.8°	5.57
12	39°	4.93	150.3°	6.11
14	38.5°	5.03	174.2°	6.45
16	38.3°	5.08	176.8°	7.01
20	38.6°	5.2	177.9°	7.69

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