A communication apparatus, such as a GPS-microphone, which is adapted for incorporating a communication system, includes a communication unit such as a speaker-microphone set, a communication transmitter such as a radio frequency transmitter communicatively networked with the communication system through radio frequency signals, and a positioning controller such as GPS controller electrically connected with the communication transmitter to encode positioning data into one or more RF positioning signals in form of audio signals wherein when the positioning controller is triggered, the communication transmitter is activated to transmit RF positioning signals to the communication system.