RUN PATH DISPLAY DEVICE

摘要

PURPOSE:To facilitate declination correction by performing the declination correction in the moving direction of a moving body which is detected by an earth magnetism sensor by using the angle difference from the moving direction of the moving body which is detected by a rate type sensor. CONSTITUTION:The rate type sensor 22 is provided as a direction detector together with a magnetic sensor 21. A CPU 3 finds and stores temporarily the angle difference between the direction detected by the rate type sensor 22 and the direction detected by the earth magnetism sensor 21 when the power source is turned off in the middle of run path display operation and then the declination correction of the direction detected by the earth magnetism sensor 21 is performed when the power source is turned on again according to the stored angle difference.