Accepted by Presence for Vol. 2, No 3.A report developed as a guide to work carried out over the last year by the NPSNET Research Group in the Graphics and Video LaboratoryThe Naval Postgraduate School Networked Vehicle Simulator IV (NPSNET-IV) is a low- cost, student written, real-time networked vehicle simulator that runs on commercial, off-the- shelf workstations (the Silicon Graphics IRIS family of computers). NPSNET-IV has been developed at the Naval Postgraduate School's (NPS) Department of Computer Science in the Graphics and Video Laboratory. It utilizes Simulation Network (SIMNET) databases and SIMNET and Distributed Interactive Simulation (DIS) networking formats. The DIS networking format is flexible enough to allow multiple play...