Jongeheer: ORC Rating

GPH

622.4

OSN

609.2

LOA

9.95 m

Displacement

3809 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6615

Medium

0.8727

High

0.9706

Triple Offshore

Low

0.8595

Medium

1.0811

High

1.1876

Boat Specifications

Dimensions

Length overall: 9.95 m
Beam: 3.41 m
Draft: 2.1 m
Displacement: 3809 kg
Crew weight: 170 kg
Wetted surface: 22.73 m²

Sails

Mainsail: 33 m²
Genoa: 26.8 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 105.48 m²

Design

Type: J 99
Builder: J Composites
Designer: J Boats
Year built: 2018

Performance data

Polar CSV

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

6,42.2,4.603103,52,5.16,60,5.54,75,6.03,90,6.25,110,6.05,120,5.8,135,5.19,144,4.697058,150,4.39
8,40.9,5.464022,52,6.15,60,6.44,75,6.86,90,7.05,110,6.97,120,6.88,135,6.42,147.5,5.64388,150,5.5
10,40.1,6.052909,52,6.73,60,6.92,75,7.16,90,7.43,110,7.43,120,7.41,135,7.14,148.5,6.567835,150,6.47
12,39.4,6.263478,52,6.95,60,7.14,75,7.33,90,7.68,110,7.86,120,7.88,135,7.61,150,7.07,150.8,7.022391
14,39,6.317989,52,7.03,60,7.24,75,7.54,90,7.88,110,8.29,120,8.26,135,8.13,150,7.41,174,6.505639
16,39.2,6.348842,52,7.05,60,7.28,75,7.67,90,8.02,110,8.67,120,8.65,135,8.7,150,7.76,177,6.999593
20,40.1,6.4974,52,7.13,60,7.35,75,7.76,90,8.33,110,9.15,120,9.6,135,10.04,150,8.7,177,7.730595

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.16	5.54	6.03	6.25	6.05	5.8	5.19	4.39
8	6.15	6.44	6.86	7.05	6.97	6.88	6.42	5.5
10	6.73	6.92	7.16	7.43	7.43	7.41	7.14	6.47
12	6.95	7.14	7.33	7.68	7.86	7.88	7.61	7.07
14	7.03	7.24	7.54	7.88	8.29	8.26	8.13	7.41
16	7.05	7.28	7.67	8.02	8.67	8.65	8.7	7.76
20	7.13	7.35	7.76	8.33	9.15	9.6	10.04	8.7

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.2°	3.41	144°	3.8
8	40.9°	4.13	147.5°	4.76
10	40.1°	4.63	148.5°	5.6
12	39.4°	4.84	150.8°	6.13
14	39°	4.91	174°	6.47
16	39.2°	4.92	177°	6.99
20	40.1°	4.97	177°	7.72

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°	5.16	6.15	6.73	6.95	7.03	7.05	7.13
60°	5.54	6.44	6.92	7.14	7.24	7.28	7.35
75°	6.03	6.86	7.16	7.33	7.54	7.67	7.76
90°	6.25	7.05	7.43	7.68	7.88	8.02	8.33
110°	6.05	6.97	7.43	7.86	8.29	8.67	9.15
120°	5.80	6.88	7.41	7.88	8.26	8.65	9.60
135°	5.19	6.42	7.14	7.61	8.13	8.70	10.04
150°	4.39	5.50	6.47	7.07	7.41	7.76	8.70