2
Wait 10 seconds before re-insert the battery again to make a proper reset
2. Precautions when using the Compass
z
Keep your digital compass away from magnets or appliances which may contain
magnetic objects, such as: mobile phones, speakers, motors, etc.
z
This compass like most magnetic compasses, points to the magnetic North, which is
slightly difference from the true North. Check section ‘3.4 Magnetic Declination’ for more
information.
z
To achieve a accurate result, you should avoid measuring a direction on the following
conditions:
The compass is too close to magnetic objects
The compass is too close to metal objects
The compass is too close to an electrical appliance.
The compass is inside a moving object or a concrete building
3. Magnetic Declination
3.1 What is Magnetic Declination
- The Magnetic North Pole is slightly difference
from the True North Pole. Most magnetic
compasses, point to the Magnetic North Pole. On
the contrary, everything measured from a map is
related to the True North Pole.
- The angular difference between Magnetic North
Pole and True North Pole is called magnetic
declination. Its amount (degrees and minutes) and
direction (easterly and westerly) depend on where
you are.
- For serious compass user or users who intends to
perform accurate navigation, the compass must be
adjusted to compensate for magnetic declination.
3.2 Magnetic Declination Information
- Most topographic maps show magnetic north pole and or the magnetic declination
information.
- The manual includes the magnetic declination for some major cities. Check the ‘Magnetic
Declination at Major Cities’ section for more detail.
- For those cities whose names are not included in the list, you may like to refer to the online
magnetic declination information.
3.3 Magnetic Declination Compensation
- compensate an object’s bearing by subtract westerly (W) magnetic declination or add
easterly (E) magnetic declination with the magnetic bearing.
Example
- 26° Westerly magnetic declination and the compass needle points 326° (MB).
- The true bearing will be 326°(MB)-26°(W) = 300°
