Issues Concerning the Department of Defense's Global Positioning System as It Enters Production

In response to a congressional request, GAO conducted a study of the Department of Defense's (DOD) Global Positioning System (GPS), a space-based radio navigation system being developed by the Air Force. GAO examined the reasonableness of the multiyear procurement strategy proposed for the space segment of the system, determined the status of the system's design and likely operational capabilities, and inquired about the user segment of the program and plans to phase out certain existing navigation systems.