sentences:  The capability provides a common picture of the location of friendly forces and therefore is referred to as the blue force tracker.When all capitalized, the term refers to a specific defense contractors' system, but the capability is found in many military and civilian mobile apps.Blue Force Tracking systems consist of a computer, used to display location information, a satellite terminal and satellite antenna, used to transmit location and other military data, a Global Positioning System receiver (to determine its own position), command-and-control software (to send and receive orders, and many other battlefield support functions), and mapping software, usually in the form of a geographic information system (GIS), that plots the BFT device on a map.