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22
6
03
NAVIGATION - GUIDANCE
The satellite navi
g
ation s
y
stem
g
uides the driver to the destination
th
a
t h
e
h
as
se
t in
acco
r
da
n
ce
with
a
c
h
ose
n r
ou
t
e
.
Initiall
y
, it searches for the destination required b
y
the user, then
i
t calculates the route and fi nall
y
it provides the visual and vocal
g
u
id
ance
i
nstruct
i
ons.
A
point o
f
interest
(
P
O
I
)
is represented by an icon on
the map, it represents an airport, a station, a town
h
all, ...
WHAT IS A POINT OF INTEREST
(
POI
)
?
Up to 40 different icons ma
y
be displa
y
ed
(
refer to the
section "Points of interest icon"
)
.
The
y
are classifi ed in 5
g
roups and identifi ed b
y
one
c
olour
f
or each
g
roup:
-
S
hops,
fi
nance and businesses
(G
reen
)
,
- Vehicles and travel
(
Dark blue
)
,
- Restaurants
(O
ran
g
e
)
,
- Public places and emer
g
enc
y
services
(
Brown
)
,
- Entertainment and attractions
(
Blue
)
.
GPS
(
Global Positionin
g
S
y
stem
)
consists of several
s
atellites arran
g
ed around the earth. The
y
continuousl
y
transmit di
g
ital si
g
nals which travel at the speed o
f
li
g
ht, on 2 different frequencies.
A
t an
y
gi
ven t
i
me, t
h
e s
y
stem rece
i
ves
i
ts pos
i
t
i
on
in r
e
l
a
ti
o
n t
o
th
e
sa
t
e
llit
es
de
t
ec
t
ed
a
n
d
th
e
tim
e
of
transmission o
f
the si
g
nal.
This enables the telematic unit to calculate its position
a
n
d
th
e
r
e
f
o
r
e
th
a
t
o
f th
e
v
e
hi
c
l
e
.
A
repositionin
g
process usin
g
the map database stored
o
n the hard disk allows the vehicle to be positioned
o
n the road network, so improvin
g
the accurac
y
of the
v
e
hi
c
l
e
l
oca
ti
o
n
fu
n
c
ti
o
n.
GPS SYSTEM
WHAT I
S
THE NAVIGATION
S
Y
S
TEM AND GP
S
?
The s
y
stem's measurements ma
y
be inaccurate if the vehicle is:
- in a tunnel or under
g
round car park,
- underneath a two-level motorwa
y
,
-
i
n an area w
i
t
h
severa
l
ver
y
high
b
u
ildi
n
g
s,
- surroun
d
e
d
by
c
l
ose
ly
p
l
ante
d
trees.
Depending on the vehicle's situation and the reception o
f
the
G
P
S
in
f
ormation, the displa
y
ed in
f
ormation ma
y
disappear
f
rom the
screen temporaril
y
.
WHAT PRECAUTIONS SHOULD BE OBSERVED IN
ORDER TO MAKE BEST USE OF THE SYSTEM?
Do not place anything on or near the
G
P
S
aerial.
Do not use an
y
di
g
ital communication equipment
(
personal
c
omputers, etc.
)
near the
G
P
S
aerial.
Do not affi x an
y
refl ective fi lms or fi lms containin
g
carbon to the
win
do
w
s
.
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