Freestyle: ORC Rating

GPH

581

OSN

564.6

LOA

12.244 m

Displacement

7600 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.704

Medium

0.9464

High

1.069

Triple Offshore

Low

0.9081

Medium

1.1649

High

1.2897

Boat Specifications

Dimensions

Length overall: 12.244 m
Beam: 3.67 m
Draft: 2.19 m
Displacement: 7600 kg
Crew weight: 829 kg
Wetted surface: 33.93 m²

Sails

Mainsail: 47.41 m²
Genoa: 51.05 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 148.41 m²

Design

Type: J 120
Builder: J Boats USA/France
Designer: Johnstone
Year built: 1994
Stability index: 113.4

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,43,5.168498,52,5.77,60,6.07,75,6.26,90,6.23,110,6.13,120,5.9,135,5.24,143.3,4.78937,150,4.43
8,40.8,6.089868,52,6.81,60,7.04,75,7.19,90,7.3,110,7.27,120,7.16,135,6.61,147.3,5.799094,150,5.63
10,39.4,6.638769,52,7.37,60,7.55,75,7.69,90,7.82,110,7.9,120,7.87,135,7.55,147.3,6.904249,150,6.71
12,38.2,6.858755,52,7.61,60,7.8,75,7.98,90,8.08,110,8.3,120,8.33,135,8.1,150,7.51,150.1,7.498009
14,37.6,6.979771,52,7.73,60,7.92,75,8.17,90,8.3,110,8.66,120,8.74,135,8.59,150,7.93,150.5,7.893325
16,37,7.037002,52,7.8,60,8.01,75,8.3,90,8.53,110,8.96,120,9.1,135,9.07,150,8.27,172.1,7.329561
20,36.9,7.152819,52,7.9,60,8.11,75,8.48,90,8.86,110,9.43,120,9.83,135,10.15,150,8.98,175.7,8.112837

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.77	6.07	6.26	6.23	6.13	5.9	5.24	4.43
8	6.81	7.04	7.19	7.3	7.27	7.16	6.61	5.63
10	7.37	7.55	7.69	7.82	7.9	7.87	7.55	6.71
12	7.61	7.8	7.98	8.08	8.3	8.33	8.1	7.51
14	7.73	7.92	8.17	8.3	8.66	8.74	8.59	7.93
16	7.8	8.01	8.3	8.53	8.96	9.1	9.07	8.27
20	7.9	8.11	8.48	8.86	9.43	9.83	10.15	8.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.78	143.3°	3.84
8	40.8°	4.61	147.3°	4.88
10	39.4°	5.13	147.3°	5.81
12	38.2°	5.39	150.1°	6.5
14	37.6°	5.53	150.5°	6.87
16	37°	5.62	172.1°	7.26
20	36.9°	5.72	175.7°	8.09

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.77	6.81	7.37	7.61	7.73	7.80	7.90
60°	6.07	7.04	7.55	7.80	7.92	8.01	8.11
75°	6.26	7.19	7.69	7.98	8.17	8.30	8.48
90°	6.23	7.30	7.82	8.08	8.30	8.53	8.86
110°	6.13	7.27	7.90	8.30	8.66	8.96	9.43
120°	5.90	7.16	7.87	8.33	8.74	9.10	9.83
135°	5.24	6.61	7.55	8.10	8.59	9.07	10.15
150°	4.43	5.63	6.71	7.51	7.93	8.27	8.98