The calibration of the electronic compass is
essential in order to display right directions during your navigations: Rotate
the device slowly in the 3 axes for a few seconds at the same time until compass
is calibrated.
IMPORTANT: The electronic compass is an instrument very sensitive to weather conditions and magnetic fields. Calibration must be carried out in the open air and far from sources of alterations of the magnetic fields, such as cars, buildings or electric lines.