Pioneer AVIC-EVO1 Operation Manual page 70

Appendix
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.
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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 consid-
erable 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.
When you drive around a roundabout.
When starting driving immediately after starting the engine.