Operating instructions

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8.8.1 Compass calibration
To ensure that the accuracy of the watch's compass it must be
calibrated:
 The first time the compass is used on the watch
Or
 When changing locations or situations from the last time the
compass was calibrated.
To calibrate the compass:
Press and hold the MODE button to enter the watch's menu.
Select SETTINGS from the menu  SYSTEM COMPASS
CALIBRATE.
Keeping the watch face parallel to the floor, rotate the watch
clockwise, until the box is complete around the words "Rotate 360"
and "Done!" appears on the screen.
Press the MODE button to exit to the previous menu.
8.8.2 Adjust for Declination for better compass
accuracy
Magnetic compasses like the one in the GPS watch point toward
the
magnetic North Pole but not necessarily to True North. On the
other hand, a map refers to the
geographical North Pole. The
difference in the angle of True North and Magnetic north is called
magnetic declination.