Driving With Dead Reckoning - Mopar Navus Owner's Manual

A > W GPS?
PPENDIX HAT IS
signal errors caused by ionospheric disturbances, timing, and satellite
orbit errors, and it provides vital integrity information regarding the
health of each GPS satellite.
View the GPS Information page to see which GPS satellites are
receiving position corrections from the WAAS satellites. A "D"
appears on the signal strength bar for GPS satellites that have been
"Differentially corrected" by the WAAS satellites.
Note: Because WAAS information is broadcast from fixed satellites
over the equator, it is possible for obstructions commonly found
in vehicles to block the view of these satellites. When this occurs,
WAAS reception may be unavailable even though normal GPS
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reception remains unaffected and fully operational.
Information: Opens the Information page, which allows you to view
GPS information (see page 56), Map information (see page 62), and
Software information (see page 63).

Driving with Dead Reckoning

The Navus comes with Dead Reckoning capabilities, which means
that you continue to receive accurate navigation guidance even if
you lose GPS reception, such as when you are traveling through
tunnels or in dense urban environments with tall buildings. With
Dead Reckoning, navigation guidance is provided by your vehicle's
electronic sensors. Driving with Dead Reckoning is so seamless, you
will not even know that you do not have GPS reception.