Abstract: A high speed obliquely disposed EM “Electromagnetic Wave” based image plotter consisting of one or more narrow beam EM radiators conveying trigonometrically derived location coordinates to one or more cooperative EM pixel decoding tags, transponders or like circuitry. The cooperative transponder detects and decodes the EM pixels and reconciles its own location from resident memory stored navigation map that is changeable by the EM plotter. The EM plotter is obliquely oriented in relation to the operative navigation space it covers as to establish a three point trigonometric relationship between the plotter's fixed elevation to its cooperative transponder's X axis distance from the plotter as determined by the elevation angle of the plotter's beacon at the time of measurement. The EM Plotter projects one or more beacons in the form of a continuous non-overlapping and repeating Archimedean or arithmetic spiral or other predetermined pattern containing EM navigation location pixels.