User's Guide

Rand McNally TripMaker
®
RVND
TM
User’s Guide Version 1.04 3
About GPS
The Global Positioning System (GPS) is a constellation of satellites that a GPS
receiver uses to calculate geographical positions. To determine a position, data
from at least three satellites is required. To determine altitude, the data from
four or more satellites is required. Accuracy of the positioning varies from
10 feet to several hundred feet, depending on vehicle placement and the
surrounding environment.
Geographical terrain (such as mountains), man-made structures (such as
highway overpasses, bridges, and tall buildings), as well as weather can
interfere with the GPS signal. For best GPS reception, position the TripMaker
RVND and mount with a clear line of sight to the sky.
Some vehicles may have a limited view of the sky due to metal sun shields or
a metallized windshield coating. If your unit does not appear to receive signals
well inside your vehicle but works well outside, contact Rand McNally for an
available external antennae.
Map data used by the TripMaker RVND includes the geographical coordinates
for address locations and points of interest (POIs). With GPS reception, your
device calculates a route to your selected location.