There is disclosed systems and methods for controlling communication of
navigation positioning information from a source of said information to
another device for tracking purposes. In one embodiment, a user having a
communicating device that maintains a record of its present location
establishes a communication link to one or more selected targets and then
grants permission to his/her device to continually send updates of
his/her device's position to said selected other devices. These updated
communications can be on a data channel of a voice communication device
if desired. In one embodiment, said receiving device can deliver said
coordinates (translated into street locations if desired) in an audio
fashion, or said receiving device can visually display (perhaps on a grid
overlay) said position of said sending device or environmental data from
said sending device.