AFTERSCHOCK: ORC Rating

GPH

605.3

OSN

588.7

LOA

10.775 m

Displacement

4247 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6866

Medium

0.9126

High

1.0363

Triple Offshore

Low

0.8816

Medium

1.1117

High

1.2349

Boat Specifications

Dimensions

Length overall: 10.775 m
Beam: 3.63 m
Draft: 2.1 m
Displacement: 4247 kg
Crew weight: 628 kg
Wetted surface: 24.83 m²

Sails

Mainsail: 34.29 m²
Genoa: 48.36 m²
Spinnaker: 91.73 m²
Asymmetric spinnaker: 0 m²

Design

Type: SCHOCK 35
Builder: W.D. SCHOCK
Designer: Shad Turner
Year built: 1985
Stability index: 110.5

Performance data

Polar CSV

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

6,42.4,5.118793,52,5.72,60,6.02,75,6.26,90,6.17,110,5.72,120,5.56,135,5.02,144.3,4.531554,150,4.25
8,41.1,6.051249,52,6.68,60,6.87,75,6.99,90,6.98,110,6.86,120,6.73,135,6.21,148.7,5.442041,150,5.37
10,38.7,6.406721,52,7.06,60,7.22,75,7.36,90,7.37,110,7.4,120,7.33,135,7.01,150,6.36,151.1,6.293802
12,37.2,6.515763,52,7.2,60,7.38,75,7.63,90,7.71,110,7.85,120,7.81,135,7.48,150,7.05,158.3,6.705179
14,37,6.611276,52,7.27,60,7.48,75,7.82,90,8.05,110,8.23,120,8.32,135,7.98,150,7.48,171.2,6.89112
16,37,6.64884,52,7.32,60,7.53,75,7.94,90,8.31,110,8.48,120,8.78,135,8.52,150,7.94,177.2,7.27869
20,36.6,6.751223,52,7.4,60,7.62,75,8.06,90,8.59,110,8.91,120,9.44,135,9.83,150,8.98,177.2,8.129706

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.72	6.02	6.26	6.17	5.72	5.56	5.02	4.25
8	6.68	6.87	6.99	6.98	6.86	6.73	6.21	5.37
10	7.06	7.22	7.36	7.37	7.4	7.33	7.01	6.36
12	7.2	7.38	7.63	7.71	7.85	7.81	7.48	7.05
14	7.27	7.48	7.82	8.05	8.23	8.32	7.98	7.48
16	7.32	7.53	7.94	8.31	8.48	8.78	8.52	7.94
20	7.4	7.62	8.06	8.59	8.91	9.44	9.83	8.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.78	144.3°	3.68
8	41.1°	4.56	148.7°	4.65
10	38.7°	5	151.1°	5.51
12	37.2°	5.19	158.3°	6.23
14	37°	5.28	171.2°	6.81
16	37°	5.31	177.2°	7.27
20	36.6°	5.42	177.2°	8.12

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°	5.72	6.68	7.06	7.20	7.27	7.32	7.40
60°	6.02	6.87	7.22	7.38	7.48	7.53	7.62
75°	6.26	6.99	7.36	7.63	7.82	7.94	8.06
90°	6.17	6.98	7.37	7.71	8.05	8.31	8.59
110°	5.72	6.86	7.40	7.85	8.23	8.48	8.91
120°	5.56	6.73	7.33	7.81	8.32	8.78	9.44
135°	5.02	6.21	7.01	7.48	7.98	8.52	9.83
150°	4.25	5.37	6.36	7.05	7.48	7.94	8.98