Module No. 5660
Setting Up for True North Readings (Magnetic Declination Calibration)
If you want the watch to indicate true north instead of magnetic north, you need to specify your current location’s magnetic declination direction (east or west) and declination angle.
The magnetic declination angle value can be set in 1° (degree) units only. Use a value that is closest to the angle you want to set.
Example: For an angle of 7.4°, set 7°.
Example: For an angle of 7°40’ (7 degrees, 40 minutes), set 8°.
Note
Magnetic declination angles (east or west) and angle degree values for specific locations can be found on geographic maps, mountain climbing maps, and other maps that include contour lines.
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Enter the Compass Mode.
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Pull out the crown.
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Press (B).
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Rotate the crown to select a magnetic declination direction and angle settings as desired.
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Push the crown back in to complete the setting operation.
This displays [
1].
This displays [DEC] and the current magnetic declination setting.
Setting range: 90° west to 90° east
[OFF]: Magnetic north
[E]: East declination (Magnetic north is east of true north.)
[W]: West declination (Magnetic north is west of true north.)
To return the setting to [OFF], press (A) and (C) at the same time.
Note
If you do not perform any operation for about two minutes after pulling out the crown, crown operations will automatically become disabled. If that happens, push the crown back in and then pull it out again.
Magnetic North and True North
There are actually two types of north: magnetic north and true north.
Magnetic north: North indicated by the needle of a compass
True north: Direction to the North Pole
As shown in the illustration below, magnetic north and true north are not the same.
Note
The north indicated on commercially available maps is normally true north.