J LAB: ORC Rating

GPH

620.4

OSN

601.8

LOA

9.95 m

Displacement

3969 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6676

Medium

0.888

High

0.9951

Triple Offshore

Low

0.8553

Medium

1.0877

High

1.2047

Boat Specifications

Dimensions

Length overall: 9.95 m
Beam: 3.41 m
Draft: 2 m
Displacement: 3969 kg
Crew weight: 440 kg
Wetted surface: 22.72 m²

Sails

Mainsail: 33.12 m²
Genoa: 25.89 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 99.88 m²

Design

Type: J-99
Builder: J Composites
Designer: J-Boats
Year built: 2018
Stability index: 118.4

Performance data

Polar CSV

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

6,43,4.703606,52,5.23,60,5.5,75,5.68,90,5.8,110,5.9,120,5.76,135,5.19,144.2,4.709864,150,4.41
8,40.8,5.548253,52,6.19,60,6.41,75,6.56,90,6.78,110,6.92,120,6.83,135,6.39,147.8,5.684281,150,5.56
10,39,6.09924,52,6.75,60,6.91,75,7.04,90,7.21,110,7.44,120,7.4,135,7.12,149.3,6.524377,150,6.48
12,37.6,6.336067,52,7.02,60,7.18,75,7.34,90,7.41,110,7.83,120,7.87,135,7.63,150,7.07,150.3,7.045565
14,37.5,6.466223,52,7.15,60,7.34,75,7.58,90,7.66,110,8.13,120,8.31,135,8.12,150,7.43,150.2,7.42136
16,37.2,6.515763,52,7.22,60,7.43,75,7.75,90,7.92,110,8.37,120,8.75,135,8.65,150,7.78,174.8,6.958639
20,37.8,6.580987,52,7.27,60,7.51,75,7.93,90,8.33,110,8.84,120,9.52,135,10.29,150,8.52,175.7,7.691651

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.23	5.5	5.68	5.8	5.9	5.76	5.19	4.41
8	6.19	6.41	6.56	6.78	6.92	6.83	6.39	5.56
10	6.75	6.91	7.04	7.21	7.44	7.4	7.12	6.48
12	7.02	7.18	7.34	7.41	7.83	7.87	7.63	7.07
14	7.15	7.34	7.58	7.66	8.13	8.31	8.12	7.43
16	7.22	7.43	7.75	7.92	8.37	8.75	8.65	7.78
20	7.27	7.51	7.93	8.33	8.84	9.52	10.29	8.52

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.44	144.2°	3.82
8	40.8°	4.2	147.8°	4.81
10	39°	4.74	149.3°	5.61
12	37.6°	5.02	150.3°	6.12
14	37.5°	5.13	150.2°	6.44
16	37.2°	5.19	174.8°	6.93
20	37.8°	5.2	175.7°	7.67

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°	5.23	6.19	6.75	7.02	7.15	7.22	7.27
60°	5.50	6.41	6.91	7.18	7.34	7.43	7.51
75°	5.68	6.56	7.04	7.34	7.58	7.75	7.93
90°	5.80	6.78	7.21	7.41	7.66	7.92	8.33
110°	5.90	6.92	7.44	7.83	8.13	8.37	8.84
120°	5.76	6.83	7.40	7.87	8.31	8.75	9.52
135°	5.19	6.39	7.12	7.63	8.12	8.65	10.29
150°	4.41	5.56	6.48	7.07	7.43	7.78	8.52