APPARATUS AND METHOD FOR DEFINING AND INTERACTING WITH REGIONS OF AN OPERATIONAL AREA

A display apparatus and method for displaying an operational area to an operative of a host platform, said operational area being defined within an external real-world environment relative to said host platform, the apparatus comprising a viewing device (12) configured to provide to said operative, in use, a three-dimensional view of said external real-world environment; a screen, a user input (33) configured to receive user input data (35) representative of a specified target or region in respect of which an operation is to be performed, said user input data including data representative of the location within said external real-world environment of said specified target or region and data representative of said operation to be performed in respect thereof; and a processor (32) configured to: use said user input data to generate or obtain three-dimensional image data representative of a geometric volume based, at least, on said operation to be performed, and display one or more images depicting said geometric volume and created using said three-dimensional image data, on said screen, the apparatus being configured to project or blend said one or more images displayed on said screen into said view of said external real-world environment at the relative location therein of the specified target or region.