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Conditions likely to cause noticeable positioning errors
Certain conditions are more likely to cause discrepancies between your actual position and the location
shown on the map display.
• 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 freeway
• If you take a recently opened road that is not on the map
• If you drive in zig-zags
• If the road has connected hairpin bends
• If there is a loop or similar road configuration
• If you take a ferry
• 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 parking lot or similar using a spiral ramp
• If your car is turned on a turntable or similar
• If your car’s wheels spin, such as on a gravel road or in snow
• If you put on chains, or change your tires for some of 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 parking lot
• When you pass around a traffic circle
• When starting driving immediately after starting the engine
• If you insert the disc and turn your Navigation System on while driving
Some types of car may not output a speed signal while driving at just a few miles (kilometers) per hour.
In such a case, the mark indicating your car’s current location may not be displayed correctly while in a
traffic jam or in a parking lot.