Abstract: The present invention provides a method and a system for proximate field orientation of an autonomous device and utilizes a transmitted wave having a first frequency of slow propagation, whereby reflections from obstacles within a proximate area are detected. According to the present invention receivers are arranged in a slanted plane or preferably along a curved base-line to, in a simple way, obtain a three-dimensional direction to an obstacle reflecting the frequency of slow propagation. Additionally, an absorber or a screen or a combination thereof is arranged above at least one receiver to act as an "eyebrow" attenuating undesired reflections which at the receiver come from overhead.