Garmin Geko 301 Owner's Manual - Page 53

To change the North Reference

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Because a compass points to Magnetic North, not True North, maps indicate the difference between True and Magnetic North with a measurement called 'declination'. The amount of declination changes as you move around the earth. Magnetic North is the direction in which a compass needle points. When the Geko 301 has your postion (i.e. "Ready to Navigate"), it corrects for declination when set to 'TRUE NORTH'. The Geko 301 bearings will correspond to the compass if the Geko 301 is set to magnetic north. Due to errors introduced when map makers flatten the earth's sphere onto paper, not all of the grid lines drawn on the map point exactly to the north pole, so the north indicated by the grid lines is called Grid North. The difference, however, is usually small enough that 'Grid' north can be considered the same as True North for traveling on land. If necessary, manually correct for the difference between Grid North and True North. If you select User for North Reference, the 'VARIATION' field is highlighted for you to edit the declination. The declination of the Geko 301's compass is shown to the right of North Reference. To change the North Reference: 1. From the MENU Page press the UP or DOWN Button to highlight 'UNITS' and then press the OK Button to display the UNITS Page. 2. Press the UP or DOWN Button to highlight the 'NORTH REF' field and press the OK Button. 3. Press the UP or DOWN Button to highlight your selection and then press the OK Button. 4. Press the PAGE Button to return to the MENU Page. When you select the 'DEFAULTS' field and press the OK Button to return the UNITS Page to the factory settings. Setup Page Heading 'MAGNETIC' north is the default north reference setting. Use 'Defaults' to return to original factory settings 41

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41
Setup Page
Because a compass points to Magnetic North, not True North, maps indicate the difference
between True and Magnetic North with a measurement called ‘declination’. The amount
of declination changes as you move around the earth.
Magnetic North
is the direction
in which a compass needle points.
When the Geko 301 has your postion (i.e. “Ready to
Navigate”), it corrects for declination when set to ‘TRUE NORTH’.
The Geko 301 bearings will correspond to the compass if the Geko 301 is set to
magnetic north. Due to errors introduced when map makers flatten the earth’s sphere onto
paper, not all of the grid lines drawn on the map point exactly to the north pole, so the
north indicated by the grid lines is called
Grid North
. The difference, however, is usually
small enough that ‘Grid’ north can be considered the same as True North for traveling on
land. If necessary, manually correct for the difference between Grid North and True North.
If you select
User
for North Reference, the
‘
VARIATION
’
field is highlighted for you to edit
the declination.
The declination of the Geko 301’s compass is shown to the right of North
Reference.
To change the North Reference:
1.
From the MENU Page press the
UP
or
DOWN
Button to highlight ‘UNITS’ and then
press the
OK
Button to display the UNITS Page.
2.
Press the
UP
or
DOWN
Button to highlight the ‘NORTH REF’ field and press the
OK
Button.
3.
Press the
UP
or
DOWN
Button to highlight your selection and then press the
OK
Button.
4.
Press the
PAGE
Button to return to the MENU Page.
When you select the ‘DEFAULTS’ field and press
the
OK
Button
to return the UNITS
Page to the factory settings.
‘MAGNETIC’ north is the
default north reference
setting.
Heading
Use ‘Defaults’ to
return to original
factory settings