Abstract: Aircraft navigation system accuracy can be optimized by proper integration of present subsystems. The Loran-C coordinate converter is a new tool which facilitates the system integration task. Certain navigation devices, e.g., a doppler-free-gyro subsystem, are calibrated in-flight to yield a much better total navigation system. Self-organizing features are included to perform simple decision-making functions automatically and thus, release the human navigator for more important tasks. The self-organizing navigation system concept shows great promise as the navigation system of the future.