Subaru Forester 2020, Руководство пользователя

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TIPS FOR THE NAVIGATION SYSTEM
199
Navigation System
7
TIPS FOR THE NAVIGATION SYSTEM
GPS (GLOBAL POSITIONING
SYSTEM)
REGARDING ERRORS IN CURRENT
POSITION DISPLAY
The system displays the vehicle current position based on
GPS information and data from various sensors and road
maps. However, when the radiowave signals from GPS
satellites are weak or when signals are received from only
two satellites or less, errors may occur in the position.
Modifying or adjusting the system will not prevent these
errors.
LIMITATIONS OF THE NAVIGATION SYSTEM
This navigation system calculates the current position using
satellite signals, various vehicle signals, map data, etc.
However, an accurate position may not be shown depending
on satellite conditions, road configuration, vehicle condition
or other circumstances.
The Global Positioning System (GPS) developed and
operated by the U.S. Department of Defense provides
an accurate current position, normally using 4 or more
satellites, and in some case 3 satellites. The GPS system
has a certain level of inaccuracy. While the navigation
system compensates for this most of the time, occasional
positioning errors of up to 300 feet (100 m) can and should
be expected. Generally, position errors will be corrected
within a few seconds.
The GPS signal may be physically obstructed, leading to
inaccurate vehicle position on the map screen. Tunnels, tall
buildings, trucks, or even the placement of objects on the
instrument panel may obstruct the GPS signals.
The GPS satellites may not send signals due to repairs or
improvements being made to them.
Even when the navigation system is receiving clear GPS
signals, the vehicle position may not be shown accurately or
inappropriate route guidance may occur in some cases.
docstructure.indb 199 2019/05/31 14:16:57