Simulation-based training in complex decision-making can be made more effective by using intelligent software agents to play key roles, such as teammates, opponents and instructors. This paper presents a cognitive software agent that is capable of compiling a tactical picture in the domain of Naval Anti-Surface Warfare. The agent is implemented in ACT-R and can perform this task in a simulated environment with a varying degree of quality, so it is usable for all the roles. The agent?s behavior was evaluated in a session with military experts and although much work remains to be done, the research was positively evaluated.