37 Shipbuilding; construction, repair and maintenance of manned or unmanned ships and underwater vehicles; installation, repair and maintenance of scientific apparatus in the nature of apparatus and installations for the production of X-rays, not for medical purposes, apparatus and instruments for astronomy, apparatus and instruments for microscopy, chromatogram analyzers for scientific or laboratory use, magnetic resonance imaging (MRI) apparatus, not for medical purposes, and X-ray apparatus, not for medical purposes, research apparatus in the nature of endoscopes for industrial purposes, endoscopy cameras for industrial purposes, vehicle locating apparatus and vehicle tracking apparatus, navigation apparatus in the nature of apparatus and instruments for controlling and monitoring aircrafts, watercrafts and unmanned vehicles, azimuth instruments, directional compasses, electronic navigational and positioning apparatus and instruments, electronic navigational, tracking and positioning apparatus and instruments, Global Positioning System (GPS) navigation devices, gyroscopes, gyrocompasses, marine compasses, navigation apparatus for boats, nautical apparatus and instruments, satellite navigational apparatus and sextants, surveying apparatus in the nature of electronic controls for motors and electronic control systems for machines, measuring apparatus in the nature of accelerometers, acoustic meters, aerometers, altimeters, anemometers, astrometric apparatus and instruments, barometers, distance measuring apparatus, distance sensors, electric current meters, electronic distance meters, flowmeters, fluid flow meters, gasoline meters, gasometers being measuring instruments, Geiger counters, gyrometers, high-pressure manometers, hydrometers, hygrometers, laser distance meters being measuring apparatus, meteorological instruments, salinometers, water meters, wavemeters, meters for testing humidity, instruments for measuring length, oscilloscopes, radiation measuring apparatus and radioactivity measuring apparatus, signaling apparatus in the nature of alarm sensors, fire alarms, fire detectors, fuel level indicators for vehicles and naval signaling apparatus, detection apparatus in the nature of electric and electronic video surveillance installations, electronic loss indicators, gas detection systems, levels being instruments for determining the horizontal, marine depth finders, maritime patrol radars, oscillographs, position sensors, proximity sensors, radar detectors, seismic detectors, sensors for determining acceleration, sensors for determining position, sensors for determining temperature and sensors for determining velocity, inspection apparatus in the nature of air analysis apparatus, audio analyzers, diagnostic apparatus, not for medical purposes, echo sounders, electric power analyzers and gas analysis apparatus, rescue apparatus in the nature of lifeboats, life buoys, life jackets, life-saving capsules for natural disasters and life-saving rafts, teaching apparatus and instruments in the nature of audiovisual teaching apparatus, training simulators, vehicle, vessel and submarine driving training simulators, simulators for driving or control of vehicles, vessels, submarines and aircrafts, simulators for simulating the operation of aircraft and vessels, computers, apparatus and instruments for conducting, switching, transforming, accumulating, regulating and controlling electricity, namely, fibers for conducting electricity, electric circuit switches, electric voltage transformers, electric accumulators, voltage regulators for electric power, electronic instruments and apparatus for controlling electric current; installation, maintenance and repair of systems onboard ships and submarines, namely, navigation and positioning electronic apparatus, global positioning systems, computer hardware and automatic and electronic controllers to be used for automatically maintaining the position and heading of ships and submarines