Previous research has produced a real-time Moving Platform Simulator using Defense Mapping Agency digital terrain elevation data and a Silicon Graphics, Inc. IRIS 4DnOGT graphics workstation. This study is a continuation of that effort with the multiple goals of investigating the effects on simulator performance of using higher resolution terrain and different terrain drawing algorithms. Also investigated was the integration of real-time, actual platform data, electronically gathered by position-location reporting instruments and platform intervisibility detenninations into the simulator. Included in this effort was a study of modeling time and a real world coordinate system. Additional work was petformed on using a distributed computing architecture to maximize simulator petfonnance.