Short Range Precision Navigation and Tracking System

A navigation and tracking system using a phase locked loop has been investigated for high accuracy short range applications. Studies and laboratory experimentation indicate that an accuracy of 0.1 m. is within feasibility limits. The ranging system features continuous operation in an analog mode with high noise immunity, and all controls are TTL compatible. Immediate applications include precision seismic profiling surveys, cable placement, narrow channel navigation, and precision location of open sea bench marks. System modularity and off the shelf parts minimize cost and maximize effectiveness. Operator interaction is minimal, and cost per meter of accuracy is far below other presently available systems.