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Walking or driving very slowly may also
substantially reduce GPS performance.
Even where location information can be
calculated in such situations, it may take much
longer to do so, and your location estimate may
not be as accurate.
Even where adequate signals from multiple
satellites are available, your GPS feature will only
provide an approximate location, often within 45
meters (150 feet) but sometimes much further
from your actual location. Advice on how to
improve GPS performance is provided in
"Enhancing GPS Performance" on page 106.
While the GPS feature of your handset can be a
valuable navigational aid, it does not replace the
need for careful navigating and good judgment.
Never rely solely on one device for navigation.
Remember that the accuracy of the location
information and the time needed to obtain it will vary
depending on circumstances, particularly the ability
to receive signals from adequate numbers of
satellites.
Viewing Your Approximate Location
The satellites used by the GPS feature of your
handset are controlled by the U.S. government and
are subject to changes implemented in accordance
with the Department of Defense GPS user policy and
the Federal Radionavigation Plan. These changes
may affect the performance of the GPS feature of
your handset.
Viewing Your Approximate
Location
1 From the main menu, select GPS > Position.
2 Scroll to view the entire screen.
This displays the following information about the last
time your location was calculated:
• The time (as Greenwich Mean Time) and date that
the location was last calculated
• The approximate location, expressed as latitude
and longitude
• The estimated accuracy of the calculated location.
This estimate of accuracy is only a very rough
estimate and may vary substantially from the
actual accuracy of the approximate location
information reported.
• The number of satellites used to calculate the
location. In general, more satellites make for better
accuracy.
105
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