Ocean Music: ORC Rating

GPH

741.7

OSN

715.2

LOA

10.46 m

Displacement

7199 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5279

Medium

0.738

High

0.8949

Triple Offshore

Low

0.6819

Medium

0.9223

High

1.0691

Boat Specifications

Dimensions

Length overall: 10.46 m
Beam: 3.25 m
Draft: 1.92 m
Displacement: 7199 kg
Crew weight: 340 kg
Wetted surface: 27.1 m²

Sails

Mainsail: 28.03 m²
Genoa: 32.8 m²
Spinnaker: 62.77 m²
Asymmetric spinnaker: 0 m²

Design

Type: Van De Stadt 34
Builder: John Clarke (Steel
Designer: Van De Stadt
Year built: 1984
Stability index: 116.5

Performance data

Polar CSV

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

6,45,3.790092,52,4.19,60,4.47,75,4.69,90,4.63,110,4.67,120,4.52,135,4.07,147.8,3.580743,150,3.5
8,43,4.512181,52,5.01,60,5.28,75,5.51,90,5.54,110,5.66,120,5.51,135,5.05,150,4.49,151.4,4.43061
10,41.8,5.016929,52,5.63,60,5.94,75,6.21,90,6.34,110,6.45,120,6.34,135,5.89,150,5.29,155.6,5.073112
12,41.8,5.499842,52,6.17,60,6.42,75,6.61,90,6.76,110,6.86,120,6.8,135,6.53,150,6.04,157.4,5.719174
14,42,5.920784,52,6.49,60,6.68,75,6.85,90,7,110,7.13,120,7.08,135,6.89,150,6.58,165.8,6.085954
16,41.4,6.105762,52,6.66,60,6.84,75,7.02,90,7.1,110,7.38,120,7.34,135,7.16,150,6.9,177.2,6.447698
20,40.5,6.180909,52,6.77,60,6.98,75,7.27,90,7.41,110,7.79,120,7.89,135,7.73,150,7.41,179,7.041072

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.19	4.47	4.69	4.63	4.67	4.52	4.07	3.5
8	5.01	5.28	5.51	5.54	5.66	5.51	5.05	4.49
10	5.63	5.94	6.21	6.34	6.45	6.34	5.89	5.29
12	6.17	6.42	6.61	6.76	6.86	6.8	6.53	6.04
14	6.49	6.68	6.85	7	7.13	7.08	6.89	6.58
16	6.66	6.84	7.02	7.1	7.38	7.34	7.16	6.9
20	6.77	6.98	7.27	7.41	7.79	7.89	7.73	7.41

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45°	2.68	147.8°	3.03
8	43°	3.3	151.4°	3.89
10	41.8°	3.74	155.6°	4.62
12	41.8°	4.1	157.4°	5.28
14	42°	4.4	165.8°	5.9
16	41.4°	4.58	177.2°	6.44
20	40.5°	4.7	179°	7.04

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°	4.19	5.01	5.63	6.17	6.49	6.66	6.77
60°	4.47	5.28	5.94	6.42	6.68	6.84	6.98
75°	4.69	5.51	6.21	6.61	6.85	7.02	7.27
90°	4.63	5.54	6.34	6.76	7.00	7.10	7.41
110°	4.67	5.66	6.45	6.86	7.13	7.38	7.79
120°	4.52	5.51	6.34	6.80	7.08	7.34	7.89
135°	4.07	5.05	5.89	6.53	6.89	7.16	7.73
150°	3.50	4.49	5.29	6.04	6.58	6.90	7.41