Apparatus for display travel path.

摘要

An apparatus for displaying a travel path of a running body in which a direction detector (2) includes a geomagnetism sensor (21) as well as a rate-type sensor (22), such as a gyroscope or a gas rate sensor for detecting changes in the yawing direction of the moving body. In the apparatus disclosed, a difference angle between the directions detected by the rate-type sensor and the geomagnetism sensor is calculated and is temporarily stored when power to the apparatus is temporarily switched off during operation of the running path displaying apparatus. Then, for a predetermined time, a declination of the direction detected by the geomagnetism sensor is corrected, depending upon the stored difference angle, when the power source is switched on again.