Patent ID: 7512406

Claim:
A personnel tracking system for real time tracking of personnel as they move through a complex structure network comprising: a plurality of electronic tracking repeaters located at predetermined positions throughout the structural network, a portable tracking transceiver carried by each individual being tracked, and a command station, a front tracking communication channel for communication between each of said transceivers and each of said repeaters in range of a transceiver to provide a first distance information signal indicating the distance between a transceiver and each repeater in communicating range, a back tracking communication channel for communication between said repeaters to provide a second distance information signal transmitted between repeaters within range and to said command station from repeaters within range of said command station, said front channel and said back channel operating on different carrier frequencies, means at said command station to calculate the real time position of the individual carrying said transceiver based on the distance information provided by said distance information signals on said back channel, and means to display said individual position on a map of the structure within which the individual is moving, said first channel communication and said back channel communication being wireless.