JOIN JOIN — ORC Rating

GPH

657.7

OSN

640.9

LOA

8 m

Displacement

1425 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6305

Medium

0.8294

High

0.9425

Triple Offshore

Low

0.8107

Medium

1.0208

High

1.1541

Boat Specifications

Dimensions

Length overall: 8 m
Beam: 2.49 m
Draft: 1.49 m
Displacement: 1425 kg
Crew weight: 384 kg
Wetted surface: 13.18 m²

Sails

Mainsail: 21.3 m²
Genoa: 13.37 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 62.75 m²

Design

Type: J 80
Builder: J COMPOSITE
Designer: JOHNSTONE
Year built: 1993

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.

6,42.8,4.402165,52,4.94,60,5.23,75,5.45,90,5.6,110,5.71,120,5.56,135,4.96,145,4.455827,150,4.21
8,41.6,5.242057,52,5.85,60,6.05,75,6.19,90,6.38,110,6.51,120,6.44,135,6.07,148,5.388845,150,5.28
10,39,5.713212,52,6.27,60,6.42,75,6.56,90,6.68,110,7.08,120,7.04,135,6.68,150,6.096819
12,37.9,5.854889,52,6.46,60,6.66,75,6.91,90,6.98,110,7.52,120,7.68,135,7.29,150,6.6,150.5,6.572026
14,37.5,5.899011,52,6.53,60,6.78,75,7.2,90,7.38,110,7.83,120,8.27,135,7.97,150,7.03,176.5,6.191548
16,37.5,5.92422,52,6.57,60,6.85,75,7.36,90,7.77,110,8.19,120,8.72,135,8.82,144.5,8.106958,150,7.62
20,38.2,6.018908,52,6.68,60,6.99,75,7.49,90,8.23,110,9,120,9.84,135,11.52,139.8,11.194088,150,9.87

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.94	5.23	5.45	5.6	5.71	5.56	4.96	4.21
8	5.85	6.05	6.19	6.38	6.51	6.44	6.07	5.28
10	6.27	6.42	6.56	6.68	7.08	7.04	6.68	6.1
12	6.46	6.66	6.91	6.98	7.52	7.68	7.29	6.6
14	6.53	6.78	7.2	7.38	7.83	8.27	7.97	7.03
16	6.57	6.85	7.36	7.77	8.19	8.72	8.82	7.62
20	6.68	6.99	7.49	8.23	9	9.84	11.52	9.87

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.23	145°	3.65
8	41.6°	3.92	148°	4.57
10	39°	4.44	150°	5.28
12	37.9°	4.62	150.5°	5.72
14	37.5°	4.68	176.5°	6.18
16	37.5°	4.7	144.5°	6.6
20	38.2°	4.73	139.8°	8.55

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