Described herein is a method and apparatus for performing calibrations on robotic components. The device incorporates a core saturation detector for detecting saturation in the inductor core indicating the presence of a magnetic field such as produced by an MRI scan. The bed liner also includes two opposing side walls which conform the truck bed side walls, and a third wall attached to the side walls near the front of the truck bed. A station may generate an information element that may be included in ad-hoc network messages.