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Calibrating compass indication
Declination correction is a correction method to adjust the compass of the watch
to indicate true north as indicated on a map by setting the declination value of the
location where you wants to find compass direction on the watch previously.
On this watch, declination of 0° to 59° east and west can be set by 1°.
You can use the results of geomagnetism survey published by governmental or
other organizations.
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