KNAB HORN 2.0 — ORC Rating

GPH

586.4

OSN

570.5

LOA

12.012 m

Displacement

6460 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7201

Medium

0.9408

High

1.0491

Triple Offshore

Low

0.9177

Medium

1.1449

High

1.253

Boat Specifications

Dimensions

Length overall: 12.012 m
Beam: 3.77 m
Draft: 2.2 m
Displacement: 6460 kg
Crew weight: 650 kg
Wetted surface: 29.12 m²

Sails

Mainsail: 46.62 m²
Genoa: 41.16 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 140.57 m²

Design

Type: J-39 MOD.
Builder: J-BOATS
Designer: JOHNSTONE
Year built: 1991
Stability index: 114.8

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.

6,42.3,5.178257,52,5.78,60,6.05,75,6.22,90,6.1,110,6.17,120,6.04,135,5.45,143.9,4.962933,150,4.63
8,40.2,6.048735,52,6.72,60,6.92,75,7.05,90,7.05,110,7.22,120,7.15,135,6.71,147.8,5.956087,150,5.81
10,38.2,6.489731,52,7.18,60,7.34,75,7.47,90,7.47,110,7.72,120,7.72,135,7.46,149.6,6.817283,150,6.79
12,37,6.661362,52,7.38,60,7.55,75,7.72,90,7.78,110,8.04,120,8.12,135,7.95,150,7.42,150.7,7.373267
14,36.4,6.746232,52,7.48,60,7.66,75,7.89,90,8.02,110,8.28,120,8.48,135,8.4,150,7.78,151.1,7.69877
16,36.4,6.8332,52,7.55,60,7.74,75,8.01,90,8.22,110,8.48,120,8.8,135,8.86,150,8.1,173.6,7.265278
20,36.4,6.907744,52,7.62,60,7.82,75,8.17,90,8.52,110,8.86,120,9.34,135,9.97,150,8.77,176.6,7.974036

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.78	6.05	6.22	6.1	6.17	6.04	5.45	4.63
8	6.72	6.92	7.05	7.05	7.22	7.15	6.71	5.81
10	7.18	7.34	7.47	7.47	7.72	7.72	7.46	6.79
12	7.38	7.55	7.72	7.78	8.04	8.12	7.95	7.42
14	7.48	7.66	7.89	8.02	8.28	8.48	8.4	7.78
16	7.55	7.74	8.01	8.22	8.48	8.8	8.86	8.1
20	7.62	7.82	8.17	8.52	8.86	9.34	9.97	8.77

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.3°	3.83	143.9°	4.01
8	40.2°	4.62	147.8°	5.04
10	38.2°	5.1	149.6°	5.88
12	37°	5.32	150.7°	6.43
14	36.4°	5.43	151.1°	6.74
16	36.4°	5.5	173.6°	7.22
20	36.4°	5.56	176.6°	7.96

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