1. An intracardiac echo catheter comprising: a flexible member having a distal end and a proximal end, a sensor array having an ultrasound transducer and at least three electrodes being attached to the distal end, each of the electrodes configured to generate a position signal in response to an electric field, the electrodes being positioned such that the position signals are not collinear; whereby the position signals allow a visualization, navigation, or mapping system to locate and orient the catheter in space.