The authors have designated the project reported in this paper as MESA™ (Maritime Environment for Simulation Analysis). The general architecture of the proposed system is based on a common interactive environment that supports traditional geographic information system (GIS) functions, such as map management and navigation, data multi-layering, object management, etc. (Giribone et al., 1996). The interactive environment is linked to simulator modules to produce crisis evaluations on specific events, such as explosions.