| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation system that can easily be mounted even on a two wheeler having a little loading space for auxiliaries by providing a movable communication terminal end transmitting a command signal and receiving operation directive information, a navigation device, and a helmet. SOLUTION: A data communication part 21 in a mobile communication terminal 20 transmits information such as present position computed by the processing unit 12 of a navigation device 10 to an information center 50 through a transmission/reception antenna 29, receives information on such items as the destination, pass-through places, and a travel route obtained based on the information from the information center 50, and transmits it to the memory device 14 of the navigation device 10. The processing unit 12 of the navigation device 10 computes the present position based on the radio wave from a GPS received by a receiving antenna 11. Inside a helmet 30, a microphone 33 is provided on the part opposite to the mouth or the throat, and a speaker 34 for hearing a voice signal or the like received with the mobile communication terminal 20 on the part opposite to the ear hole of the operator or the like. |
