Appendix Gfaqs - Garmin eTrex Owner's Manual

Appendices
Appendix G
Can I use the eTrex indoors?
FAQs
No. The DEMO mode is available, but we suggest that
only dealers use it.
Do I need to subscribe to a service to use the
eTrex?
No. The GPS satellites are owned by the United States
Department of Defense (DoD) and have been funded by
U.S. taxpayers' dollars.
Reception of GPS satellite signals is free to everyone.
Does the eTrex work anywhere in the world and
in any weather?
Yes.
How accurate is a Garmin GPS?
The eTrex is accurate to within 15 meters without the
DoD-imposed Selective Availability (S/A). Using differ-
ential techniques, the eTrex can be as accurate as 1-5
meters. The eTrex is accurate to within 100 meters under
S/A.
Another factor that will effect the accuracy of the GPS
receiver is the geometry of the satellites in view of the
GPS receiver. A poor geometry situation can provide less
accurate position readings, and this especially applies
to GPS altitude measurements. The altitude reading on
the GPS unit can vary by +/- 450 ft. depending on the
level of degradation being imposed under S/A. It is not
uncommon to see the altitude continuously drift up and
down when S/A is being imposed.
Why can't I see the display in the daylight?
Adjust the contrast (see page 9).
Why can't I interface my computer with the
eTrex?
Make sure that you have the correct INPUT/OUTPUT
format selected on your eTrex.
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