Drilling rig

A system for mitigating accidents on a drilling rig, the drilling rig comprising a rig floor and a derrick, the system comprising a plurality of cameras, each camera of said plurality of cameras capturing an image of a zone on a rig floor in real time and sending the image to a master control computer system, the master control computer system processing said image of the zone analyzing said image to detect the presence of a rig hand, the master control system having a map of unsafe zones about items on the drilling rig and assessing if the rig hand is within said unsafe zone and based on said assessment allowing or disallowing at least one of said items to operate in or be conveyed into said unsafe zone, wherein the rig floor comprises a plurality of entrance points further comprising at least one camera located with a field of view directed at each entrance point of the plurality of entrance points to obtain images of rig hands passing through said entrance, wherein said image is sent to said master control computer system, whereupon the master control computer system executes an algorithm to assess when a rig hand enters or exits said entrance.