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