The Navy is increasingly dependent on networks and associated net-centric operations to conduct military missions, so a vital goal is to establish and maintain dependable networks for ship and multiship networks. The authors develop a framework for measuring the dependability of naval networks and describe a software tool for modeling the impact that individual network components have on overall mission operational availability. Develops a framework for measuring the dependability of naval networks and describes a software tool for modeling the impact that individual network components have on overall mission operational availability. Develops a framework for measuring the dependability of naval networks and describes a software tool for modeling the impact that individual network components have on overall mission operational availability.