37
Setup Page
The eTrex bearings will correspond to a compass if the eTrex 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’ (GRID)
. But, the difference is usually small enough that
‘Grid’ north can be considered the same as True North for travelling on land. If necessary, you
can select a ‘
User-Defined Grid’ (USER)
to correct for the difference between Grid North
and True North manually.
To change the North Reference:
1. Press the
PAGE
Button and switch to the ‘MENU’ Page. Use the
UP
and
DOWN
Button
and highlight the ‘SETUP’ field. Press
ENTER
. The ‘SETUP’ Page appears.
2. Press the
UP
or
DOWN
Button to select ‘UNITS.’ Press
ENTER
. The ‘UNITS’ Page appears.
3. Press the
UP
or
DOWN
Button and select the ‘NORTH REF’ field. Press
ENTER
.
4. Press the
UP
or
DOWN
Button to select the desired reference (TRUE, MAG, GRID, or
USER). Press
ENTER
. The desired North Reference is selected.
5. Press
PAGE
to return to the page of your choice.
Variance
The eTrex automatically lists the variance between Grid North and True North for the selected
North Reference grid. If you select a user-defined grid, you can enter the variance manually.
To enter Variance manually:
1. From the MENU Page, press the
UP
or
DOWN
button to highlight ‘SETUP.’ Press
ENTER
.
2. Press the
UP
or
DOWN
button to select ‘UNITS.’ Press
ENTER
. The UNITS Page appears.
3. Press the
UP
or
DOWN
button to select the ‘VARIANCE’ field. Press
ENTER
.
4. Press the
UP
or
DOWN
button to select ‘INCHES’ or ‘MILLIBARS.’ Press
ENTER
. Press
PAGE
to select the page of your choice.
Units Page
While it should rarely be needed the user can manually
adjust the variation/declination by selecting USER in the
North Reference field.
With a USER-defined grid selected, you can manually set the
variance by highlighting the Variance field, pressing
ENTER
and inputting a new angle.
Summary of Contents for eTrex - Hiking GPS Receiver
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