9 Satellite communication devices, namely, satellite processors and satellite transmitters and receivers featuring two-way text messaging, GPS locating and GPS tracking; global positioning system (GPS); global positioning system (GPS) consisting of computers, recorded computer software for receiving, processing, and transmitting signals to and/or from satellite systems, transmitters, receivers, and network interface devices; GPS navigation devices; satellite navigation systems, including, a global positioning system (GPS); electronic navigational devices, including, global positioning satellite (GPS) based navigation receivers; electronic depth sounders; portable communication devices, namely, radio transceivers and wireless telephones; digital map data and recorded software for facilitating use of GPS based navigation receivers, radio transceivers and wireless telephone; downloadable software for updating map data for facilitating use of GPS based navigation devices; downloadable map data for facilitating use of GPS based navigation devices; global positioning systems comprised of computers, transmitters, network interface, GPS receivers, antennas, and a LCD display; GPS receivers; portable GPS devices, including, electronic instruments for determining and outputting position and speed; portable personal GPS navigation devices; electronic handheld devices, including, a combination two-way radio and GPS receiver; feature of a global positioning system (GPS) to allow enhanced satellite acquisition, sold as a component part of the global positioning system; satellite communications equipment and instruments; global positioning system (GPS) apparatus; electronic position sensing devices; telephone apparatus; wireless telephones; telephone communication apparatus; telephone handsets; telephone equipment; GPS apparatus for navigation; electronic navigation apparatus and instruments; navigation systems using satellite reference; satellite navigational apparatus; navigational instruments; electronic safety instruments; personal protection devices (electronic alarms); message sending instruments; apparatus for message sending; apparatus for receiving satellite broadcast signals; apparatus for transmission via satellites; satellite navigational apparatus; message receiving apparatus