A scanning system and method for locating a point within a region. The system includes a flow generator configured to provide a flow of gas through the device, a power source configured to adjust a position of the variable vanes or other variable-geometry mechanism of the device, and a controller configured to selectively control the adjustment of the position of the vanes. The guiding elements can include a plurality of wires, blades, or tabs. The first UDP responder modifies the UDP packet header field and forwards the UDP packet to a second UDP responder or returns the UDP packet to the probe based on the unmodified header field information.