America's capacity to alert itself against possible enemy air attack is greatly strengthened by the presence at strategic locations throughout the United States of "gap filler" radar stations, which by constantly monitoring possible gaps in the continental air defense network, help link together into one continuous chain the nationwide SAGE (Semi-Automatic Ground Environment) radar system. Heart of these gap filler station is the unique diesel power package shown above, which thinks for itself, turns itself on and off, sends signals descriptive of its operating conditions to technicians in control centers miles away, and operates without manpower in attendance. Designed by Consolidated Diesel Electric Corporation, Stamford, Connecticut, the package features an electric "brain" and built-in "memory system," and so requires only periodic visits (as shown) for observation and recording of operating characteristics. The unusual generating equipment is now being used by the United States Air Force to power approximately 80% of all unmanned radar installations in the United States.