The invention provides a system for determining a state of a body. A location unit that includes a carrier component having a front side and an opposing back side, an attachment device having a first portion connected to the carrier component and a second portion securing the carrier component to the body with the back side facing a surface of the body. The location unit has a camera secured to the carrier component on the back side thereof for capturing video images of a feature of the body at or below the surface of the body. A server computer system has a recording system that stores the video images on a recording medium and an analysis system connected to the recording medium and being configured to analyze the image to determine the state of the body and report back to the location device.
