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Sat navs are easy to install – and many are equally useful away from the car, guiding you even if you're on foot. Here's a list of some terms used.
| 21 Euro | Common map found in sat nav, covering 21 European countries. |
| 2D/3D | The sat nav can display maps in both 'flat' 2D form and 3D, keeping the view more true to life. |
| Bluetooth calling | Connects to a Bluetooth enabled mobile phone, allowing you to make and receive hands free calls through the sat nav speaker. |
| Full postcode search | Allows you to pinpoint your destination using the postcode. A quick and easy way of programming your sat nav. |
| GPS | Global Positioning System. The network of satellites orbitting Earth that sat nav systems use to locate your position. |
| MP3 player function | Upload MP3 tracks to your unit and listen to your favourite tunes on the move. |
| Photoviewer | Shows your digital photos to family and friends wherever you are, using the screen on your sat nav. |
| Points of interest | Alerts the driver to things such as petrol stations, hotels, cash points and restaurants. |
| Position Plus | A feature that prevents your sat nav 'losing its way' when you pass through a tunnel or a heavily built-up area where GPS reception may be poor. |
| Pre-loaded maps | Defines which areas have been pre-loaded to the sat nav. Maps can usually be updated via the manufacturer’s website. |
| Removable memory card | Lets you add updated maps or different countries by simply changing the memory card. |
| Safety camera alerts | Alerts the driver to fixed location safety cameras. This information can be updated using a subscription service. |
| Sat Nav | Satellite navigation. The general term for all types of equipment that locate you and help you plan routes using the GPS system. |
| Screensize | The measure of visible picture from one corner to the other, diagonally across the screen |
| Speech recognition | Recognises spoken destination instructions, allowing you to programme your route just by speaking. |
| TMC | Traffic Message Channel. Updates your sat nav with real-time traffic information over the radio network. |
| Traffic information | The unit will display live information regarding traffic jams, accidents and road works. This service is usually available through subscription. |
