| 摘要 |
<p>A bidirectional wireless vessel navigation system is provided to enhance user convenience by performing precisely clearance procedure using bidirectional communication. A bidirectional wireless vessel navigation system includes terminals(100a,100b,100c), a main device(110), and a central management server(130). The terminals mounted on vessels receive satellite signals from GPS(Global Positioning System) satellites, determine current positions of the vessels, transmit a response signal according to a response request signal of the main device, and transmit a distress signal in casuality. The main device mounted in a police office or a management vessel transmits the response request signal to the terminals, receives the response and distress signals, and transmits the received response and distress signals to the central management server. The central management server connected to the main device receives and stores the response and distress signals from the main device.</p> |
