Audiovox VOM-78 User Manual download pdf (Page 159)

Subject to technical changes

In the top right corner, the GPS reception quality icon shows the current accuracy of the position information.

Descrip-

tion

The software has no connection to the GPS receiver: GPS

navigation is not pos-

sible.

Devices with a built-in GPS receiver are permanently connected.

On such devices, the icon does not appear in normal circumstanc-

es.

The software is connected to the GPS receiver, but the signal

is too weak and the receiver cannot determine the GPS position.

GPS navigation is not possible.

Only a few satellites are received. Position information is avail-

able, but elevation (altitude) cannot be calculated.

GPS navigation is possible, but the position error may

be signicant.

Altitude information is available, the position is a 3D posi-

tion. GPS navigation is possible.

4.1.8 Stored and online trafc information in route planning

The recommended route is not always the same between two points. Ofine statistical trafc information (historical

speed information or trafc patterns) can be taken into account in the route calculation based on the time of day and

the day of week whenever suitable data exists. In addition, real-time trafc information (TMC) can help you avoid cur-

rent trafc events like temporary road closures or a trafc jam caused by an accident. Both functions are subject to

data availability.

Smart Routes with stored statistical trafc information

If statistical trafc information is stored with the map data, the software can take them into account when planning a

route. In normal cases, these statistics help you avoid usual trafc jams on the given day of week in the given hour but

in some cases like on public holidays that fall on normal weekdays, they can be misleading. You can disable this Smart

Route feature in Trafc settings (page 76).

Real-time trafc information (TMC)

Unlike statistical trafc information, TMC (Trafc Message Channel) can provide you with the real-time status of the

trafc. Route calculation can avoid road blocks or unexpected trafc jams caused by an accident.

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Audiovox VOM-78 User Manual Page 159