Magnetic North And True North; Setting Up For True North Readings; Digital Compass Reading Precautions; Location During Use - Casio 3475 Operation Manual

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.

Magnetic North and True North

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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.
1.
Enter the Compass Mode.
Navigating Between Modes
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2.
Hold down (A) for at least two seconds.
This displays the Digital Compass Mode
setting screen.
Pointer
3.
Use (A) and (D) to move the pointer to
[MAGNETIC DECLINATION].
4.
Press (C).
Operation Guide 3475
5.
Use (A) (East) and (D) (West) to change
the magnetic declination direction and
angle.
Setting range: 90° west to 90° east
[0° (OFF)] Magnetic north
Magnetic north east of true
[E]
north (East declination)
Magnetic north west of true
[W]
north (West declination)
Magnetic declination direction
Magnetic declination angle
To stop the setting operation, press (E)
●
and advance to step 7.
6.
Press (C).
7.
Use (A) and (D) to select whether or not
you want to save your current settings.
[YES] Saves current settings.
[NO] Discards current settings.
This returns to the magnetic
[RETURN] declination angle calibration
screen.
8.
Press (C) to complete the setting
operation.
After the setting operation is complete,
[SETTING COMPLETED] will appear for
a few seconds, and then the Digital
Compass Mode setting screen will re-
appear.
9.
Press (E) to exit the setting screen.
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.
True north
Magnetic north
Earth
Note
The north indicated on commercially
●
available maps is normally true north.
Digital Compass Reading
Precautions

Location During Use

Taking readings near sources of strong
magnetism can cause reading error. Keep the
watch away from the following types of items.
Permanent magnets (magnetic accessories,
etc.), metal objects, high-voltage wires, aerial
wires, electrical household appliances (TVs,
computers, cellphones, etc.)
Note that correct direction readings are not
●
possible indoors, especially inside of
reinforced concrete structures.
Accurate direction readings are not
●
possible in motor vehicles, on boats, on
aircraft, etc.
Storage Location
Exposure of the watch to magnetism can
affect the accuracy of digital compass
readings. Keep the watch away from the types
of items below.
Permanent magnets (magnetic accessories,
etc.), metal objects, electrical household
appliances (TVs, computers, cellphones, etc.)
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