The Phase I research has demonstrated the capabilities of neural networks in vision related applications, and the technology has considerable promise in a variety of other application areas as well. However, there is still a considerable amount of research to be performed before the full potential of applications is understood. In the light of this situation, the Phase II project will focus on the further development of the volts system, expanding its capabilities as a tool for use in general neural net re search by implementing the Portable Neural Environment (PNE). The pne will include support for full portability across a variety of computer architectures, including parallel processors, and will form the basis for a high-performance, cost-effective neural net workstation. The system will then be used to implement a full capability neural net-based navigation system using aerial imagery.