||The application of Information and Communication Technologies in emergency management environments is a challenging research topic; particularly, the applicability of C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance) systems specifically designed for these environments. A key aspect in emergency management is the training of operatives at all levels, from intervention to operational, including tactical command and control. Virtual reality is widely used for training and learning purposes, but the interaction of real and virtual worlds with new standards (i.e. MPEG-V), going a step further from the traditional approach to create virtual environments based in expensive simulation dedicated equipment and allowing data streaming between both worlds, has not yet been exploited in training for emergency management. This paper proposes an architecture for a C4ISR training system providing interoperability between real and virtual worlds using the MPEG-V standard and allowing simultaneous and real time training of both real and virtual units.