Garmin eTrex Camo Owner's Manual - Page 50

Appendix G

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Appendices Appendix G FAQs What Grid Formats does the eTrex Support? hddd.dddddo (degrees, decimal degrees) Can I use the eTrex indoors? No. The DEMO mode is available, but we suggest that only dealers use it. hdddomm.mm (degrees, minutes, decimal minutes) hdddomm'ss.s (degrees, minutes, seconds, deci- mal seconds) Do I need to subscribe to a service to use the eTrex? British Grid No. The GPS satellites are owned by the Dutch Grid United States Department of Defense (DoD) and Finnish KKJ27 Grid have been funded by U.S. taxpayers' dollars. Reception of GPS satellite signals is free to everyone. German Grid Irish Grid Does the eTrex work anywhere in the world and in any weather? Maidenhead Yes. MGRS (Military Grid Reference System) How accurate is a Garmin GPS? New Zealand The eTrex is accurate to within 15 meters without Qatar Grid the DoD-imposed Selective Availability (S/A). Using Swedish Grid differential techniques, the eTrex can be as accurate as 1-5 meters. The eTrex is accurate to within Swiss Grid 100 meters under S/A. Taiwan Grid Another factor that will effect the accuracy of User Defined Grid 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 UTM/UPS (Universal Transfer Mercator/Universal Polar Stereographic) measurements. The altitude reading on the GPS W Malaysian R unit can vary by +/- 450 ft. depending on the level of degradation being imposed under S/A. It is not Can I turn off the Track Log? uncommon to see the altitude continuously drift No. You can clear the track log, but it is always up and down when S/A is being imposed. activated. Why can't I see the display in the daylight? What does the message Adjust the contrast (see page 9). "NO DGPS POSITION" mean? Why can't I interface my computer with the eTrex had a differential fix and lost it. eTrex? Make sure that you have the correct INPUT/ OUTPUT format selected on your eTrex. 48

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48
What Grid Formats does the eTrex Support?
hddd.ddddd
o
(degrees, decimal degrees)
hddd
o
mm.mm (degrees, minutes, decimal min-
utes)
hddd
o
mm’ss.s (degrees, minutes, seconds, deci-
mal seconds)
British Grid
Dutch Grid
Finnish KKJ27 Grid
German Grid
Irish Grid
Maidenhead
MGRS (Military Grid Reference System)
New Zealand
Qatar Grid
Swedish Grid
Swiss Grid
Taiwan Grid
User Defined Grid
UTM/UPS (Universal Transfer Mercator/Universal
Polar
Stereographic)
W Malaysian R
Can I turn off the Track Log?
No. You can clear the track log, but it is always
activated.
What does the message
"NO DGPS POSITION" mean?
eTrex had a differential fix and lost it.
Appendices
Appendix G
FAQs
Can I use the eTrex indoors?
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?
N
o. 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
differential techniques, the eTrex can be as accu-
rate 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 read-
ings, 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.