Balancing Act: ORC Rating

GPH

614.9

OSN

595.6

LOA

9.94 m

Displacement

3876 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6682

Medium

0.8971

High

1.0176

Triple Offshore

Low

0.858

Medium

1.0986

High

1.2303

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: 22.8 m²

Sails

Mainsail: 33.6 m²
Genoa: 26.36 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 101.67 m²

Design

Type: J99 2.0
Builder: J Boats
Designer: Alan Johnstone
Year built: 2018
Stability index: 126.8

Performance data

Polar CSV

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

6,43.2,4.732714,52,5.26,60,5.54,75,5.71,90,5.85,110,5.93,120,5.78,135,5.19,143.9,4.703029,150,4.39
8,40.9,5.583093,52,6.23,60,6.46,75,6.6,90,6.84,110,6.96,120,6.85,135,6.39,147.8,5.672464,150,5.54
10,39,6.163578,52,6.8,60,6.96,75,7.08,90,7.3,110,7.49,120,7.43,135,7.13,148.9,6.540015,150,6.47
12,37.2,6.452991,52,7.11,60,7.26,75,7.4,90,7.56,110,7.92,120,7.92,135,7.64,150,7.07,150.1,7.059664
14,36.4,6.58472,52,7.29,60,7.46,75,7.66,90,7.74,110,8.29,120,8.39,135,8.13,150,7.43,150.2,7.42136
16,36.3,6.68794,52,7.39,60,7.6,75,7.88,90,7.99,110,8.59,120,8.9,135,8.67,150,7.77,174.5,6.972098
20,36.4,6.746232,52,7.48,60,7.74,75,8.17,90,8.5,110,9.17,120,10.01,135,10.38,150,8.52,175.7,7.691651

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.26	5.54	5.71	5.85	5.93	5.78	5.19	4.39
8	6.23	6.46	6.6	6.84	6.96	6.85	6.39	5.54
10	6.8	6.96	7.08	7.3	7.49	7.43	7.13	6.47
12	7.11	7.26	7.4	7.56	7.92	7.92	7.64	7.07
14	7.29	7.46	7.66	7.74	8.29	8.39	8.13	7.43
16	7.39	7.6	7.88	7.99	8.59	8.9	8.67	7.77
20	7.48	7.74	8.17	8.5	9.17	10.01	10.38	8.52

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.45	143.9°	3.8
8	40.9°	4.22	147.8°	4.8
10	39°	4.79	148.9°	5.6
12	37.2°	5.14	150.1°	6.12
14	36.4°	5.3	150.2°	6.44
16	36.3°	5.39	174.5°	6.94
20	36.4°	5.43	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°	5.26	6.23	6.80	7.11	7.29	7.39	7.48
60°	5.54	6.46	6.96	7.26	7.46	7.60	7.74
75°	5.71	6.60	7.08	7.40	7.66	7.88	8.17
90°	5.85	6.84	7.30	7.56	7.74	7.99	8.50
110°	5.93	6.96	7.49	7.92	8.29	8.59	9.17
120°	5.78	6.85	7.43	7.92	8.39	8.90	10.01
135°	5.19	6.39	7.13	7.64	8.13	8.67	10.38
150°	4.39	5.54	6.47	7.07	7.43	7.77	8.52