Casio WSD-F20X User Manual page 30

Using Compass
The pointer indicates true north.
The value in the center of the display shows how many degrees there are in
a clockwise direction from the north indication (which is 0°) to 12 o'clock on
the watch. For example, if 12 o'clock on the watch is facing due east, the value
will show 90°. Letters on the display also indicate the direction that 12 o'clock
is facing (16 directions).
*1 Initial default setting. For information about how to change settings and
have magnetic north indicated, see
Calibration".
To lock the direction
You can use Compass to lock the indicated direction to help you maintain a
specific bearing while trekking, etc. While the watch's 12 o'clock position is
pointed in the direction you want, tap the touch screen. If the watch's 12
o'clock position deviates from the locked direction, the amount of the
deviation will be indicated in blue.
To unlock a direction, tap the touch screen again.
Compass Calibration (Magnetization Correction)
The "Perform magnetization correction." message may appear while you are
using Compass. To calibrate the compass, move the watch around as shown
in the animation that appears on the watch display. Keep moving your arm
until the message disappears, indicating that magnetization correction is
complete.
Note
The watch normally performs magnetization correction automatically. You
●
only need to perform the above operation when the message appears.
*1
"Compass Magnetic Declination
EN-29