Navigon MN 6 - Manual (Page 9)

User’s manual MobileNavigator 6
Before you begin - 7 -
2 Before you begin
2.1 Software Installation
1. Insert the memory card into your device.
Note: The memory card must remain in the device during
operation of the navigation system.
2. Slide the main switch on the under side of the device to
the ON position.
The installation will now be carried out.
2.2 Navigation with GPS
GPS is based on a total of 24 satellites that circle the earth
and, in doing so, are constantly transmitting their position and
the current time. The GPS receiver receives this data and
calculates its own geographical position on the basis of the
information broadcast by the various satellites.
For a sufficiently precise positioning it is necessary to obtain
the data from at least three satellites. With the data from 4 or
more satellites the altitude above sea level can also be
ascertained. The determination has an accuracy of about 3
yards.
Once MobileNavigator 6 has determined your position, this
position can be used as a starting point for a route calculation.
The map data on your navigation device includes the
geographical coordinates of all digitally recorded points of
interest, streets and places. From this the server can calculate
a route from any given starting point to a destination.
The calculation of the current position and its representation
on the map takes place once every second. So your current
position is always shown on the map.