Acura 2012 TL Navigation - Manual (Page 131)

System Initialization
130 Navigation System
Although your navigation system is one
of the most highly sophisticated pieces
of equipment you will fi nd in a modern
automobile, you may fi nd during its use
that it has certain limitations.
The system uses GPS signals to aid
in determining its current location.
The GPS is operated by the U.S.
Department of Defense. For security
reasons, there are certain inaccuracies
built into the GPS that the navigation
system must constantly compensate for.
This can cause occasional positioning
errors of up to several hundred feet.
For example, in urban areas where
streets are close together, this could
cause the system to show that you are
traveling on a street that parallels the
street you are actually on. The system
will, under most circumstances, correct
itself while you drive.