| 摘要 |
PROBLEM TO BE SOLVED: To specify and display a position of one's station with the utilization of waves of GPS satellites, and display only other stations belonging to the same group when positions of the other stations are to be displayed at the same time with the utilization of the ground communication. SOLUTION: The apparatus is provided with an ID memory part 17 which stores ID information of one's own station and ID information of the other stations belonging to the same group as one's own station, and an ID recognition part 20 for recognizing ID information from the received waves. In the ID recognition part 20, a position of the other station is displayed on a display 6 based on information of a moving direction of the position obtained from a signal having ID information agreeing with the ID information of the other station stored in the ID memory part 17. |
