Storm: ORC Rating

GPH

722.7

OSN

698.9

LOA

9.35 m

Displacement

4665 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6048

Medium

0.8477

High

1.0233

Triple Offshore

Low

0.7873

Medium

1.0648

High

1.237

Boat Specifications

Dimensions

Length overall: 9.35 m
Beam: 3.25 m
Draft: 1.49 m
Displacement: 4665 kg
Crew weight: 573 kg
Wetted surface: 24.07 m²

Sails

Mainsail: 23.67 m²
Genoa: 30.75 m²
Spinnaker: 63.08 m²
Asymmetric spinnaker: 54.23 m²

Design

Type: Ocean 31
Builder: Robertson & Caine
Designer: Lavranos
Year built: 1992

Performance data

Polar CSV

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

6,45.5,3.909208,52,4.29,60,4.61,75,4.9,90,4.89,110,4.76,120,4.61,135,4.17,147.5,3.663779,150,3.56
8,44,4.657048,52,5.17,60,5.51,75,5.84,90,5.83,110,5.83,120,5.67,135,5.2,150,4.57,150.8,4.536487
10,43.7,5.269949,52,5.87,60,6.23,75,6.5,90,6.55,110,6.62,120,6.51,135,6.09,150,5.43,153.7,5.253844
12,44.1,5.834628,52,6.37,60,6.63,75,6.84,90,6.96,110,7.01,120,6.95,135,6.7,150,6.2,156.1,5.917393
14,42.8,6.119418,52,6.67,60,6.88,75,7.07,90,7.24,110,7.34,120,7.26,135,7.04,150,6.72,172.7,6.109521
16,41.7,6.201129,52,6.81,60,7.03,75,7.28,90,7.47,110,7.7,120,7.61,135,7.35,150,7.04,180,6.59
20,41.1,6.250304,52,6.88,60,7.14,75,7.6,90,7.82,110,8.35,120,8.38,135,8.07,150,7.65,180,7.21

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.29	4.61	4.9	4.89	4.76	4.61	4.17	3.56
8	5.17	5.51	5.84	5.83	5.83	5.67	5.2	4.57
10	5.87	6.23	6.5	6.55	6.62	6.51	6.09	5.43
12	6.37	6.63	6.84	6.96	7.01	6.95	6.7	6.2
14	6.67	6.88	7.07	7.24	7.34	7.26	7.04	6.72
16	6.81	7.03	7.28	7.47	7.7	7.61	7.35	7.04
20	6.88	7.14	7.6	7.82	8.35	8.38	8.07	7.65

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45.5°	2.74	147.5°	3.09
8	44°	3.35	150.8°	3.96
10	43.7°	3.81	153.7°	4.71
12	44.1°	4.19	156.1°	5.41
14	42.8°	4.49	172.7°	6.06
16	41.7°	4.63	180°	6.59
20	41.1°	4.71	180°	7.21

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°	4.29	5.17	5.87	6.37	6.67	6.81	6.88
60°	4.61	5.51	6.23	6.63	6.88	7.03	7.14
75°	4.90	5.84	6.50	6.84	7.07	7.28	7.60
90°	4.89	5.83	6.55	6.96	7.24	7.47	7.82
110°	4.76	5.83	6.62	7.01	7.34	7.70	8.35
120°	4.61	5.67	6.51	6.95	7.26	7.61	8.38
135°	4.17	5.20	6.09	6.70	7.04	7.35	8.07
150°	3.56	4.57	5.43	6.20	6.72	7.04	7.65