Citizen Eco-Drive BN4021-02E - Checking and correcting the reference position; What is the reference position?

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Calibrating compass indication Calibrating compass indication
6
Press and hold button for 3 seconds or more.
Declination correction completes and compass function
starts.
It may take a moment to indicate compass direction.
Wait until movement of the hands stop.
7
Press button to finish the procedure.