Just Jones: ORC Rating

GPH

650.3

OSN

629.2

LOA

10.35 m

Displacement

4055 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6171

Medium

0.8542

High

0.9892

Triple Offshore

Low

0.7985

Medium

1.0457

High

1.1744

Boat Specifications

Dimensions

Length overall: 10.35 m
Beam: 3.22 m
Draft: 1.79 m
Displacement: 4055 kg
Crew weight: 572 kg
Wetted surface: 23.29 m²

Sails

Mainsail: 33.05 m²
Genoa: 28.28 m²
Spinnaker: 71.3 m²
Asymmetric spinnaker: 0 m²

Design

Type: Farr 1020
Year built: 1981
Stability index: 108.7

Performance data

Polar CSV

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

6,43.3,4.561864,52,5.07,60,5.35,75,5.53,90,5.41,110,5.4,120,5.23,135,4.69,145.1,4.084609,150,3.87
8,41.4,5.385869,52,6.01,60,6.25,75,6.4,90,6.4,110,6.49,120,6.33,135,5.8,149.6,4.985428,150,4.96
10,39.9,5.970031,52,6.59,60,6.76,75,6.88,90,6.97,110,7.09,120,7,135,6.65,150,5.94,150.5,5.917121
12,38.2,6.222507,52,6.88,60,7.04,75,7.19,90,7.26,110,7.49,120,7.44,135,7.15,150,6.71,158.3,6.371534
14,37.6,6.336067,52,7.02,60,7.2,75,7.41,90,7.49,110,7.83,120,7.84,135,7.57,150,7.16,171.8,6.587348
16,37.6,6.424418,52,7.09,60,7.29,75,7.58,90,7.74,110,8.11,120,8.22,135,7.99,150,7.55,177.2,7.008367
20,37.8,6.505053,52,7.16,60,7.38,75,7.76,90,8.11,110,8.49,120,8.94,135,8.9,150,8.34,179,7.721176

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.07	5.35	5.53	5.41	5.4	5.23	4.69	3.87
8	6.01	6.25	6.4	6.4	6.49	6.33	5.8	4.96
10	6.59	6.76	6.88	6.97	7.09	7	6.65	5.94
12	6.88	7.04	7.19	7.26	7.49	7.44	7.15	6.71
14	7.02	7.2	7.41	7.49	7.83	7.84	7.57	7.16
16	7.09	7.29	7.58	7.74	8.11	8.22	7.99	7.55
20	7.16	7.38	7.76	8.11	8.49	8.94	8.9	8.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	3.32	145.1°	3.35
8	41.4°	4.04	149.6°	4.3
10	39.9°	4.58	150.5°	5.15
12	38.2°	4.89	158.3°	5.92
14	37.6°	5.02	171.8°	6.52
16	37.6°	5.09	177.2°	7
20	37.8°	5.14	179°	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°	5.07	6.01	6.59	6.88	7.02	7.09	7.16
60°	5.35	6.25	6.76	7.04	7.20	7.29	7.38
75°	5.53	6.40	6.88	7.19	7.41	7.58	7.76
90°	5.41	6.40	6.97	7.26	7.49	7.74	8.11
110°	5.40	6.49	7.09	7.49	7.83	8.11	8.49
120°	5.23	6.33	7.00	7.44	7.84	8.22	8.94
135°	4.69	5.80	6.65	7.15	7.57	7.99	8.90
150°	3.87	4.96	5.94	6.71	7.16	7.55	8.34