Systems and networks, namely, radio transmitters, receivers and transceivers, computers, computer software, electronic computer network routers, LCD display screens, LED display units, batteries, encoded electronic chip cards for identifying particular users of mobile locating devices, electronic sensors, and antennas for monitoring and detecting the location of people; electronic devices in the nature of transmitters and receivers to be worn by people for use with the aforesaid systems and networks in monitoring and detecting the location of people; controllers and routers included in this class, namely, electronic power controllers and electronic computer network routers to be used in systems for monitoring or detecting the location of people; computerized sensor management consoles, namely, electrical control panels for systems that monitor or detect the location of people; battery chargers; people monitoring and detecting systems, namely, portable wireless electronic positioning devices, radio transmitters, receivers and transceivers, computers, computer software, electronic computer network routers, LCD display screens, LED display units, batteries, electronic sensors, electronic chips, and antennas for monitoring and detecting the location of people on boats and industrial, commercial and other land based sites; transmitters and receivers for the aforesaid systems and networks for use in monitoring and detecting the location of people on boats and industrial, commercial and other land based sites; apparatus for monitoring the location of people, namely, comprised of transmitters and receivers, electronic controllers and routers and computers