| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular navigation device, system and method for retrieving a mobile unit position, and computer-readable storage media capable of surely recognizing the mutual position of one vehicle and the other vehicle. SOLUTION: An information center 2 stores, in a database, the position data contained in a stop position upload signal or a travel position upload signal received from an on-vehicle machine 1. When receiving a position inquiry request signal, the information center 2 transmits a stop position download signal or a travel position download signal to an inquiry terminal (on-vehicle machine 1 or personal computer 7 mounted on other vehicles) transmitting the signal when receiving a position inquiry request signal, so as to notify the positional information of the on-vehicle machine 1. |
