Pioneer AVIC-Z910DAB Operation Manual page 82

If the road has a series of hairpin
bends.
If there is a loop or similar road
configuration.
If you take a ferry.
82
En
If you are driving on a long, straight
road or a gently curving road.
If you are on a steep mountain road
with many height changes.
If you enter or exit a multi-storey car
park or similar structure using a spiral
ramp.
If your vehicle is turned on a turntable
or similar structure.
If your vehicle's wheels spin, such as on
a rough track or in snow.
If you put on chains, or change your
tyres for ones with a different size.
If trees or other obstacles block the
GPS signals for a considerable period.
If you drive very slowly, or in a start-
and-stop manner, as in a traffic jam.
If you join the road after driving
around a large car park.