A single triggershunt coil is utilized for combined induced magnetic field triggering and shunt impedance. When the wind speed is above a specific value, the yaw angle of the nacelle is held constant, the blade pitch angle is controlled according to the yaw angle Y of the wind direction relative to the nacelle, and the rotor is allowed to rotate freely. A detailed process is this: Colors at a target pixel are binary coded, and the results are retained as data. According to the invention in each receiver finger i an estimation of the timing delay {circumflex over } is provided and interference from other signal components j are subtracted from signal components of the current signal path i yielding a reliable estimated timing delay {circumflex over }. A heel support at the upper surface interacts with the foot securing system to eliminate toe gripping and strain. A semiconductor pattern is provided on the insulating film, and a second metallic pattern is provided on the semiconductor pattern.