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Features
Map Datum - Offers a selection of nearly all map datums in common use. Every map is based
on a map datum (a reference model of the earth’s shape) and is usually listed in the title block
of the map. If you are comparing GPS coordinates to a paper map, chart, or other reference,
the map datum in this field must match the horizontal map datum used to generate the map
or other reference. The default datum is WGS-84 (World Geodetic Survey 1984) and should
only be changed when using maps or charts specifying a different datum. If a map does specify
a datum, use the options list to find datums applicable to the region of the map, selecting the
one that provides the best positioning at a known point. If necessary, you also may choose the
‘User’ datum for custom designed grids.
NOTE: The ‘User’ datum is based on a WGS-84-Local datum and is an advanced
feature for unlisted or custom datums. To learn more, check your local library or the
Internet for educational materials on datums and coordinate systems.
Distance/Speed - Choose from three units of measure to display your rate of travel.
Elevation/Vertical Speed - Choose from two units of measure to record your elevation and
vertical speed.
Pressure - Choose from millibars or Inches to measure the pressure.
Display Setup Page
You can adjust the amount of time that the backlighting feature stays on and adjust the
screen contrast.
Backlighting Timeout - Choose from Stays On, to delays of 15 seconds, 30 seconds, one
minute, or two minutes before timing out.
Setup Page
Units Setup Page