Nokia Wireless GPS Module LD-3W User Manual page 6

I n t r o d u c t i o n
If you stand still, GPS cannot detect which way you are facing,
because it determines your direction on the basis of your movement.
Note: The GPS (global positioning system) is operated by the United
States government, which is solely responsible for accuracy and
maintenance of the system. The accuracy of location data can
be affected by adjustments to GPS satellites made by the United
States government and is subject to change with the United
States Department of Defense civil GPS policy and the Federal
Radionavigation Plan. Accuracy can also be affected by poor
satellite geometry.
Availability and quality of GPS signals may be affected by
buildings and natural obstacles, as well as weather conditions.
The GPS receiver should only be used outdoors to allow reception
of GPS signals.
GPS should not be used for precise location measurement, and you
should never rely solely on location data from the GPS receiver. This
GPS receiver does not support location of the phone by emergency
operators.
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