An automobile radar which serves to provide data for cruise control or other systems in a host vehicle, comprising means for measuring radar boresight misalignment by detecting the presence of apparent variations in the spacing of stationary objects from the direction of motion of the host vehicle and utilizing such detection to compensate for any misalignment. One or more rotating sipes are formed in each of the tread blocks. The data processing system also includes a code-optimizing coprocessor in communication with the CPU and the system memory. In this application, the device is introduced into the right atrium, and the functional tip is then positioned against the atrial septum.