Balancing Act: ORC Rating

GPH

610.9

OSN

591.7

LOA

9.94 m

Displacement

3876 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6681

Medium

0.9072

High

1.0451

Triple Offshore

Low

0.8607

Medium

1.1058

High

1.2496

Boat Specifications

Dimensions

Length overall: 9.94 m
Beam: 3.41 m
Draft: 1.99 m
Displacement: 3876 kg
Crew weight: 559 kg
Wetted surface: 22.94 m²

Sails

Mainsail: 33.87 m²
Genoa: 25.93 m²
Spinnaker: 94.7 m²
Asymmetric spinnaker: 92.13 m²

Design

Type: J 99 2.0
Builder: J Boats
Designer: Alan Johnstone
Year built: 2018
Stability index: 126.1

Performance data

Polar CSV

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

4,43.2,3.402067,52,3.88,60,4.14,75,4.35,90,4.59,110,4.43,120,4.29,135,3.75,143.1,3.351321,150,3.09
6,43.2,4.718996,52,5.25,60,5.53,75,5.8,90,6.04,110,5.95,120,5.8,135,5.23,143.1,4.776883,150,4.41
8,41.1,5.586789,52,6.22,60,6.44,75,6.74,90,6.93,110,6.97,120,6.86,135,6.39,147.3,5.704027,150,5.55
10,39,6.150711,52,6.79,60,6.95,75,7.2,90,7.4,110,7.52,120,7.44,135,7.1,150,6.47,153.2,6.28511
12,37.2,6.452991,52,7.11,60,7.25,75,7.45,90,7.75,110,7.97,120,7.92,135,7.6,150,7.1,160.1,6.710709
14,36.4,6.609568,52,7.29,60,7.46,75,7.66,90,8.02,110,8.39,120,8.4,135,8.08,150,7.56,167.1,7.037621
16,36,6.687128,52,7.4,60,7.61,75,7.88,90,8.21,110,8.76,120,8.95,135,8.6,150,8.01,170.9,7.382923
20,36.1,6.769887,52,7.5,60,7.74,75,8.17,90,8.5,110,9.61,120,10.3,135,10.21,150,9.05,169.6,8.255628
24,36.9,6.802681,52,7.53,60,7.8,75,8.31,90,8.9,110,10.76,120,12.16,135,13.72,140.8,13.007383,150,11.64

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	3.88	4.14	4.35	4.59	4.43	4.29	3.75	3.09
6	5.25	5.53	5.8	6.04	5.95	5.8	5.23	4.41
8	6.22	6.44	6.74	6.93	6.97	6.86	6.39	5.55
10	6.79	6.95	7.2	7.4	7.52	7.44	7.1	6.47
12	7.11	7.25	7.45	7.75	7.97	7.92	7.6	7.1
14	7.29	7.46	7.66	8.02	8.39	8.4	8.08	7.56
16	7.4	7.61	7.88	8.21	8.76	8.95	8.6	8.01
20	7.5	7.74	8.17	8.5	9.61	10.3	10.21	9.05
24	7.53	7.8	8.31	8.9	10.76	12.16	13.72	11.64

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	43.2°	2.48	143.1°	2.68
6	43.2°	3.44	143.1°	3.82
8	41.1°	4.21	147.3°	4.8
10	39°	4.78	153.2°	5.61
12	37.2°	5.14	160.1°	6.31
14	36.4°	5.32	167.1°	6.86
16	36°	5.41	170.9°	7.29
20	36.1°	5.47	169.6°	8.12
24	36.9°	5.44	140.8°	10.08

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 4 kt6 kt8 kt10 kt12 kt14 kt16 kt20 kt24 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 4 kt (kt)	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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	3.88	5.25	6.22	6.79	7.11	7.29	7.40	7.50	7.53
60°	4.14	5.53	6.44	6.95	7.25	7.46	7.61	7.74	7.80
75°	4.35	5.80	6.74	7.20	7.45	7.66	7.88	8.17	8.31
90°	4.59	6.04	6.93	7.40	7.75	8.02	8.21	8.50	8.90
110°	4.43	5.95	6.97	7.52	7.97	8.39	8.76	9.61	10.76
120°	4.29	5.80	6.86	7.44	7.92	8.40	8.95	10.30	12.16
135°	3.75	5.23	6.39	7.10	7.60	8.08	8.60	10.21	13.72
150°	3.09	4.41	5.55	6.47	7.10	7.56	8.01	9.05	11.64