9 Scientific, nautical, marine signaling and life-saving and teaching, apparatus and instruments, namely, radio marine beacons including for training purposes; surveying, optical, measuring and checking apparatus and instruments, namely, surveillance cameras for marine traffic control; tracking buoys for signaling purposes; batteries; emergency position-indicating radio beacons, search and rescue transponders; radio and satellite receivers and transmitters; radio and telecommunication apparatus and instruments, radio links to ground stations, devices for wireless radio transmission; marine radio communication machine and apparatus, namely, Navtex receivers; portable radios; radio broadcast receiving sets; electrical apparatus for the locating of personnel programmed to use global positioning system (GPS) and cellular communications; electrical global position systems, namely, time and frequency network synchronization equipment, namely, time servers, time sensitive networking equipment, routers, switches, including wired, wireless, and optical systems, and resilient Positioning, Navigation and Timing (PNT) equipment, namely, hybrid inertial navigation systems, radar, lidar, eLoran, vision signal of opportunity, and crowd sourced PNT; transponders; radio distress signaling beacons; radio transmitters of electronic signals, global positioning system (GPS) receiver and satellite transmitter; emergency alerting and locating radio beacons with or without GPS positioning for search and rescue; ground station receivers; search and rescue software and software sold together with computer hardware for the purpose of co-ordination and control of emergency and distress situations; vessel tracking and monitoring systems comprised of GPS or Iridium or GPRS tracking devices, for use in fishing fleet tracking and monitoring; vessel traffic software for vessel remote monitoring, vessel reporting to authorities, tracking and monitoring the location and activity of fishing boats, and commercial shipping vessels; maritime surveillance systems comprised of GPS and AIS tracking devices, radars and video cameras; maritime surveillance software for monitoring and reporting the vessel traffic within an area ; integrated radar, camera and automatic identification system software and software sold together with computer hardware for the purpose of marine vessel tracking; visual display units in the nature of electric luminescent display panels; Electrical and electronic apparatus and instruments for the measurement, analysis, distribution, comparison, displaying and calibration of time and frequency, namely, timers; frequency references in the nature of stable oscillators for frequency calibration; time and frequency distribution systems, namely, frequency distribution amplifiers; Global Navigation Satellite System (GNSS) constellation simulators comprised of computer hardware and electronic display interfaces