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User’s manual NAVIGON 7310
Before you begin - 14 -
The following memory media can be used in the NAVIGON 7310:
► microSD cards
Removing the memory card
1. Switch off the navigation device. To do so, press the
(On/Off)
key.
2. Press the memory card gently into the device until the lock
disengages.
3. Let go of the memory card. It will now project slightly out of the
device.
4. Pull the memory card out of the slot.
Inserting a memory card
1. Insert the memory card into the device. (See illustration.)
2. Press the card into the device until it locks into place.
Note: The navigation device will work only if the memory card contains
the navigation software and map data.
2.6 Navigating with GPS
GPS is based on a total of at least 24 satellites orbiting the Earth and
continuously transmitting signals of their position and time. The GPS
receiver receives this data and calculates its own geographical position
on the basis of the information transmitted by the various satellites.
Data from at least three satellites is required for positioning with an
acceptable degree of accuracy. With data from four or more satellites it
is possible in addition to determine the position's altitude above sea
level. Positioning is accurate to within three metres.
Once the navigation device has determined your position, this position
can be used as a starting point for calculating a route.
The map data on your navigation device includes the geographical
coordinates of all digitally recorded points of interest, streets and