STEREOSCOPIC BIRDVIEW

navigation apparatus and instruments, namely, compasses, navigation computers, gyros, geomagnetic sensors; vehicle-speed sensors, beacon receivers, global positioning system receivers, map data memory for tracking vehicles and ships; indicators for measuring speed; transducers for use with navigational instruments; nautical mileage counter; navigational depth sounders; navigation computers and electronic path control units; computer programs for generating digitized maps for use in the field of traffic information and telecommunications; computer software for generation of maps from a database