Computer based system using global positioning satellite technology for tracking vehicles, vessels, and other mobile assets, comprising wireless transceivers, global positioning satellite receiver, antennas, motherboard, central processing unit, integrated circuits with embedded programming to operate battery chargers, battery charger, battery, metal chassis, input and output computer ports for peripheral devices, sensors for detecting and monitoring fuel level, refrigeration level, tether and untether, door open or close, loaded or unloaded, volume of load, temperature, and engine status; and software for interpreting and processing information received from the system hardware, software for mapping, configuring, and managing mobile assets equipped with the system hardware, software for sending information from mobile assets equipped with the system hardware to a central location, software for managing the recharging of a battery, software that determines when information should be received from system hardware and software that formats such information; software for controlling frequency at which the system hardware transmits information to a central location