Abstract: In a navigator for vehicles, a distance sensor detects a distance travelled by a vehicle and a heading sensor detects a direction of travel of the vehicle. In response to the detection signals from the sensors a microcomputer computes the present position of the vehicle and generates a position signal. In accordance with the position signal from the microcomputer and the selection of display selection switches a display tube gives a graphic display of a road map or a character display of a road map data.

Abstract: A vehicle navigator is disclosed, in which in response to a storage command signal generated by the turning on of a storage switch, the present position data of a vehicle corresponding to the present cursor position is stored in a memory. In response to a set command signal subsequently generated by the turning on of a set switch, the running track data between the latest position stored and the present cursor position is stored in the memory, so that the running track is additionally displayed on a road map display device.

Abstract: A mobile navigator comprises a distance detector for generating a running distance signal, an azimuth detector for generating a progression azimuth detecting signal, a CRT display for indicating the current position of an automotive vehicle, a microcomputer for calculating the current position of the vehicle from the distance detecting signal and the progression azimuth detecting signal and supplying the current position signal to the display, and a memory in which is stored a plurality of map data, earth's magnetic field declination information different for each area in association with the map data, and earth's magnetic field strength information.