Embedded training.  Embedded training is defined as training provided by capabilities built into or added onto operatiional systems, subsystems, or equipment, to enhance and maintain the skill proficiency of personnel.  The diagram shows how the ET subsystem connects and communicates with other systems, both within and external to the system/platform.  The soldier receives information from the displays, and takes action by making menu selections, pushing buttons, etc.  The ET application on the system senses the actions and injects stimulus, changing the displays. When crew actions change the common operating picture (COP), the information is transmitted to other platforms, updating the COP in all the other platforms in the exercise.  Communication with the infrastructure is also required. The ET application uses the system/platform communication system for these communications.  Connection between the ET application and communication system is over the weapon system/platform internal network.