1. A method for managing a training arena for training an operator of a host vehicle, the method comprising the procedures of: generating a training arena model, the training arena model being a data model of said training arena, said training arena model detailing at least the physical environment of said training arena, detailing real entities within said training arena, detailing virtual entities within said training arena, and detailing said host vehicle, said training arena model being generated at least according to pre-determined training data; updating the training arena model according to gathered real time training arena data, said gathered real time training data including virtual entities data, wherein receiving virtual entities data includes the following sub-procedures for each selected one of said virtual entities: managing said selected virtual entity for simulating a real entity according to said training arena model as would have been detected and as could have been perceived by said selected one of said virtual entities were said virtual entities were real, thereby generating selected virtual entity data detailing said selected virtual entity; and updating said training arena model according to said selected virtual entity data; deriving from said training arena model an operator arena model, said operator arena model detailing a portion of said training arena as would have been detected by a plurality of service systems of said host vehicle were said virtual entities were real, producing a representation of said operator arena model; and presenting to said operator said representation of said operator arena model, wherein said plurality of service systems of said host vehicle and of said real entities are native service systems.