Jumanji: ORC Rating

GPH

572.4

OSN

557.7

LOA

12.244 m

Displacement

6556 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6948

Medium

0.955

High

1.0883

Triple Offshore

Low

0.9142

Medium

1.184

High

1.328

Boat Specifications

Dimensions

Length overall: 12.244 m
Beam: 3.67 m
Draft: 2.15 m
Displacement: 6556 kg
Crew weight: 802 kg
Wetted surface: 31.9 m²

Sails

Mainsail: 46.8 m²
Genoa: 44.06 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 153.23 m²

Design

Type: J 120
Builder: J Boats
Designer: Johnstone
Year built: 1994
Stability index: 125.4

Performance data

Polar CSV

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

6,43.6,4.957387,52,5.6,60,6.11,75,6.68,90,6.87,110,6.41,120,6.05,135,5.38,143.8,4.894912,150,4.56
8,42,5.920784,52,6.75,60,7.21,75,7.6,90,7.72,110,7.44,120,7.35,135,6.81,146.9,5.956653,150,5.76
10,41.1,6.714764,52,7.38,60,7.64,75,7.96,90,8.12,110,8.04,120,8,135,7.72,147.1,7.09845,150,6.88
12,39.1,7.00989,52,7.69,60,7.87,75,8.2,90,8.48,110,8.49,120,8.53,135,8.23,150,7.68,150.9,7.622124
14,37.8,7.099873,52,7.83,60,8.04,75,8.39,90,8.78,110,8.83,120,9.09,135,8.81,150,8.08,150.9,8.011241
16,37.5,7.197297,52,7.91,60,8.14,75,8.55,90,9.04,110,9.23,120,9.57,135,9.46,150,8.44,171.2,7.467909
20,36.9,7.265364,52,7.98,60,8.24,75,8.78,90,9.41,110,10.14,120,10.33,135,11.13,143,10.417769,150,9.6

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.6	6.11	6.68	6.87	6.41	6.05	5.38	4.56
8	6.75	7.21	7.6	7.72	7.44	7.35	6.81	5.76
10	7.38	7.64	7.96	8.12	8.04	8	7.72	6.88
12	7.69	7.87	8.2	8.48	8.49	8.53	8.23	7.68
14	7.83	8.04	8.39	8.78	8.83	9.09	8.81	8.08
16	7.91	8.14	8.55	9.04	9.23	9.57	9.46	8.44
20	7.98	8.24	8.78	9.41	10.14	10.33	11.13	9.6

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.59	143.8°	3.95
8	42°	4.4	146.9°	4.99
10	41.1°	5.06	147.1°	5.96
12	39.1°	5.44	150.9°	6.66
14	37.8°	5.61	150.9°	7
16	37.5°	5.71	171.2°	7.38
20	36.9°	5.81	143°	8.32

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°	5.60	6.75	7.38	7.69	7.83	7.91	7.98
60°	6.11	7.21	7.64	7.87	8.04	8.14	8.24
75°	6.68	7.60	7.96	8.20	8.39	8.55	8.78
90°	6.87	7.72	8.12	8.48	8.78	9.04	9.41
110°	6.41	7.44	8.04	8.49	8.83	9.23	10.14
120°	6.05	7.35	8.00	8.53	9.09	9.57	10.33
135°	5.38	6.81	7.72	8.23	8.81	9.46	11.13
150°	4.56	5.76	6.88	7.68	8.08	8.44	9.60