The apparatus 1, wherein the apparatus further comprises a control module, the control module configured to adjust one or more of the pre determined positions defining the safety zone, {TAIL ~ one or more characteristics} of the emitted radiation, {HEAD ~ one or more characteristics} of the one or more visible identifiers, or any combination thereof 
The apparatus 1 , wherein the apparatus further comprises a control module , the control module configured to adjust one or more of the pre determined positions defining the safety zone , { TAIL ~ one or more characteristics } of the emitted radiation , { HEAD ~ one or more characteristics } of the one or more visible identifiers , or any combination thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH