KNAB HORN 2.0 — ORC Rating

GPH

591.5

OSN

575.9

LOA

12.012 m

Displacement

6460 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7057

Medium

0.9295

High

1.0399

Triple Offshore

Low

0.9041

Medium

1.138

High

1.2515

Boat Specifications

Dimensions

Length overall: 12.012 m
Beam: 3.77 m
Draft: 2.2 m
Displacement: 6460 kg
Crew weight: 500 kg
Wetted surface: 28.85 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: 115.9

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.

6,42.4,4.983375,52,5.57,60,5.87,75,6.11,90,6.04,110,6.15,120,6.02,135,5.45,144.3,4.95023,150,4.64
8,41.2,5.900999,52,6.61,60,6.86,75,7.04,90,7.11,110,7.26,120,7.18,135,6.73,147.3,5.965461,150,5.8
10,40,6.487874,52,7.15,60,7.32,75,7.46,90,7.48,110,7.74,120,7.72,135,7.48,149.3,6.861644,150,6.82
12,38.4,6.648008,52,7.35,60,7.53,75,7.72,90,7.78,110,8.06,120,8.17,135,7.94,150,7.44,151.1,7.367517
14,37.8,6.732856,52,7.44,60,7.64,75,7.92,90,8.06,110,8.31,120,8.59,135,8.45,150,7.78,152.3,7.623728
16,38.1,6.836651,52,7.5,60,7.71,75,8.06,90,8.31,110,8.54,120,8.88,135,8.98,150,8.11,174.8,7.26992
20,37.2,6.93006,52,7.62,60,7.81,75,8.2,90,8.69,110,8.94,120,9.4,135,10.2,150,8.88,175.7,7.98247

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.57	5.87	6.11	6.04	6.15	6.02	5.45	4.64
8	6.61	6.86	7.04	7.11	7.26	7.18	6.73	5.8
10	7.15	7.32	7.46	7.48	7.74	7.72	7.48	6.82
12	7.35	7.53	7.72	7.78	8.06	8.17	7.94	7.44
14	7.44	7.64	7.92	8.06	8.31	8.59	8.45	7.78
16	7.5	7.71	8.06	8.31	8.54	8.88	8.98	8.11
20	7.62	7.81	8.2	8.69	8.94	9.4	10.2	8.88

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.68	144.3°	4.02
8	41.2°	4.44	147.3°	5.02
10	40°	4.97	149.3°	5.9
12	38.4°	5.21	151.1°	6.45
14	37.8°	5.32	152.3°	6.75
16	38.1°	5.38	174.8°	7.24
20	37.2°	5.52	175.7°	7.96

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