The basis for a strong systems engineering effort must lie in a through understanding of the technical alternatives available. In the anti-air warfare communications network area these alternatives must be developed from a comprehensive theoretical base and tailored to the specific needs of the environment. The Phase I activity will establish a set of architectural candidates for communication networks to support anti-air warfare systems as they evolve in reaction to new systems, threats, and tactical situations. The candidates will represent the application of current networking technologies to the battle group wide communication problem and will emphasize the integration problems of multiple platforms and an revolving asset base.