SUNDOWNER: ORC Rating

GPH

704.1

OSN

682.7

LOA

9.25 m

Displacement

4534 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5748

Medium

0.7845

High

0.9121

Triple Offshore

Low

0.7398

Medium

0.9635

High

1.0829

Boat Specifications

Dimensions

Length overall: 9.25 m
Beam: 3.26 m
Draft: 1.82 m
Displacement: 4534 kg
Crew weight: 508 kg
Wetted surface: 22.76 m²

Sails

Mainsail: 24.01 m²
Genoa: 30.33 m²
Spinnaker: 72.96 m²
Asymmetric spinnaker: 0 m²

Design

Type: Jarkan 925
Builder: Jarkan
Designer: John King
Year built: 1984

Performance data

Polar CSV

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

6,43.1,4.053893,52,4.55,60,4.81,75,5.02,90,4.96,110,5.06,120,4.93,135,4.51,147,3.97057,150,3.85
8,41.6,4.747271,52,5.36,60,5.65,75,5.88,90,5.94,110,6.08,120,5.96,135,5.49,150,4.82,151,4.767786
10,41.6,5.349037,52,5.98,60,6.2,75,6.36,90,6.51,110,6.6,120,6.54,135,6.28,150,5.66,152,5.572245
12,40.5,5.773232,52,6.33,60,6.49,75,6.62,90,6.77,110,6.94,120,6.88,135,6.68,150,6.32,160,5.948754
14,39.4,5.939952,52,6.51,60,6.67,75,6.83,90,6.89,110,7.25,120,7.23,135,7,150,6.68,180,6.18
16,38.6,5.962736,52,6.58,60,6.76,75,7,90,7.08,110,7.51,120,7.57,135,7.34,150,6.98,180,6.58
20,39.8,6.052453,52,6.61,60,6.81,75,7.18,90,7.47,110,7.78,120,8.09,135,8.02,150,7.62,180,7.16

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.55	4.81	5.02	4.96	5.06	4.93	4.51	3.85
8	5.36	5.65	5.88	5.94	6.08	5.96	5.49	4.82
10	5.98	6.2	6.36	6.51	6.6	6.54	6.28	5.66
12	6.33	6.49	6.62	6.77	6.94	6.88	6.68	6.32
14	6.51	6.67	6.83	6.89	7.25	7.23	7	6.68
16	6.58	6.76	7	7.08	7.51	7.57	7.34	6.98
20	6.61	6.81	7.18	7.47	7.78	8.09	8.02	7.62

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.1°	2.96	147°	3.33
8	41.6°	3.55	151°	4.17
10	41.6°	4	152°	4.92
12	40.5°	4.39	160°	5.59
14	39.4°	4.59	180°	6.18
16	38.6°	4.66	180°	6.58
20	39.8°	4.65	180°	7.16

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°	4.55	5.36	5.98	6.33	6.51	6.58	6.61
60°	4.81	5.65	6.20	6.49	6.67	6.76	6.81
75°	5.02	5.88	6.36	6.62	6.83	7.00	7.18
90°	4.96	5.94	6.51	6.77	6.89	7.08	7.47
110°	5.06	6.08	6.60	6.94	7.25	7.51	7.78
120°	4.93	5.96	6.54	6.88	7.23	7.57	8.09
135°	4.51	5.49	6.28	6.68	7.00	7.34	8.02
150°	3.85	4.82	5.66	6.32	6.68	6.98	7.62