Navigating With Gps; Switching The Navigation Device On And Off - Garmin maps plus more User Manual

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2.5

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
places. This enables the device to calculate a route between a starting
point and a destination.
Calculation of the current position and its representation on the map
take place approximately once every second. In other words, your
current position is always shown on the map.
3 Switching the navigation device on and
off
The navigation device can be in one of four states:
On: The navigation device is on and can be operated.
►
Screensaver: The navigation device is on. However, you see only
►
a screensaver. As long as the screensaver is visible, the device
cannot be operated.
The screensaver is available only when the device is mounted in
the vehicle.
If you switch on the screensaver while navigation is in progress, you
will continue to hear the navigation announcements from the
device.
If music is being played when the screensaver is switched on, the
music will continue.
Standby: When you switch the navigation device to standby mode,
►
the next time it is switched on it will start very quickly. In standby
mode the device still consumes a small amount of energy however.
Depending on how full the battery is, it can become flat within a few
days or up to a few weeks.
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Switching the navigation device on and off