When Positioning By Gps Is Impossible; Conditions Likely To Cause Noticeable Positioning Errors - Pioneer AVIC-F220 Operation Manual

Appendix
Appendix
When positioning by GPS is
impossible
! GPS positioning is disabled if signals can-
not be received from more than two GPS
satellites.
! In some driving conditions, signals from
GPS satellites may not reach your vehicle.
In this case, it is impossible for the system
to use GPS positioning.
In tunnels or en-
closed parking
garages
When driving
among high build-
ings
! If a car phone or mobile phone is used near
this product, GPS reception may be lost
temporarily.
! Do not cover this product with spray paint
or vehicle wax, because this may block the
reception of GPS signals.
p If a GPS signal have not been received for a
long time, your vehicle's actual position
and the current position mark on the map
diverge considerably or do not be updated.
In such case, once GPS reception is re-
stored, accuracy will be recovered.
Conditions likely to cause
noticeable positioning errors
For various reasons, such as the state of the
road you are travelling on and the reception
status of the GPS signal, the actual position of
66
Engb
Under elevated
roads or similar
structures
When driving through
a dense forest or tall
trees
your vehicle may differ from the position dis-
played on the map screen.
! If you make a shallow turn.
! If there is a parallel road.
! If there is another road very nearby, such
as in the case of an elevated motorway.
! If you take a recently opened road that is
not on the map.
! If you drive in zigzags.