A navigation system for restricted waters

A combination of Raydist "T" and WANG Programmable Calculator Systems provides a capability for local precise navigation over large areas of up to 10,000 square miles. Daytime positioning accuracy of 10 yards is usual for an unlimited number of users. With the WANG, capability for system self-survey, generation of hyperbolic charts to any scale, plotting of actual tracks in x - y coordinates, and pre-plotting of parallel tracks is available. Three or four separate sites are needed for four transmitters powered by thermoelectric generators. Stations may be placed aboard anchored ships or buoys. Surveys, area searches, and channel clearance operations in coastal regions would find the system useful. This capability was developed by the Navy for its helicopter-equipped mobile Mine Countermeasures Forces using off-the-shelf commercially available and proven equipments to meet existing requirements.