9 Scientific apparatus and instruments, namely, ultra-high vacuum chambers, Glassware for scientific experiments in laboratories, spectrometers and parts and fittings therefor, Scientific instrumentation for measuring electricity not for medical use; Sensor chips for scientific use; nautical apparatus and instruments, namely, radar machines and apparatus; Surveying apparatus and instruments; Photographic apparatus and instruments, namely, photographic cameras; cinematographic machines and apparatus; optical apparatus and instruments, namely, optical inspection apparatus, optical transmitters, optical receivers, optical position sensors, blank optical data carriers; weighing apparatus and instruments; Measuring apparatus and instruments, namely, pressure measuring apparatus, distance measuring apparatus, instruments for measuring length; Signalling apparatus and instruments, namely, marking and signalling buoys, signalling whistles, rotating signalling lights, rescue laser signalling flares, emergency LED signalling flares; apparatus for checking flight parameters; life-saving apparatus and instruments, namely, inflatable jackets, flashing lights, luminous signs, luminous beacons, safety belts, protection and safety apparatus, namely, inflatable flotation devices; teaching apparatus and instruments, namely, flights simulators, simulators for the steering and control of vehicles, Simulators for training personnel in the flying of aircraft; apparatus and instruments for conducting, switching, transforming, accumulating, regulating, or controlling the use and distribution of electricity; navigation and guidance apparatus and instruments, namely, navigation apparatus for airplanes, navigation apparatus for vehicles in the nature of on-board computers ; GPS navigation device, satellite-aided navigation systems, altimeters