It's a system you can use to give you directions when you're on the go. It's a machine that talks to you as you go along and tells you exactly where and when to take a turning, ensuring (hopefully) that you never get lost again. Stores of the map information you use from every journey, in addition to points of interest and addresses. What's a Sat Nav? The software can work out the path between any two points on the map and can combine road speeds and information, if necessary, to advise you on arrival times and road conditions on route. You might get a larger display or a one that flips out when triggered, if you opt to get a unit built into your dash board. Sat navs are called GPS systems because they utilize the Global Positioning Satellites which orbit the earth. The nav sees the position of the satellites and finds its position on the surface of the planet.

Calculating longitude, latitude and elevation, the position is laid over a street map which reveals your driving position to within a few yards. Bluetooth Some sat nav units are enabled for Bluetooth and can be paired with a cell phone. In case you have one of those units it is possible to use the nav speaker to make and receive calls that are hands-free while on the move - helping to keep you safe and legal. Should you choose a portable unit then you've got a choice of 2 sizes: usually 3.5 " or 4.3" diagonally.

The screen's size depends on the type of nav you select: Keeps your unit powered up when you switch off the ignition. Bluetooth is the name of this technology that enables hands-free phoning. Built into some the FM Transmitter converts the nav instructions and material like MP3 music into a radio signal, so that music and sound are played through the car speakers, through your car radio. This enables you to play MP3 files. Sat navs have touch screens, giving you a way that is fast and effortless to navigate - touch the screen see your path, and change settings, like to zoom in. Screens The world of GPS navigation can be confusing at first but we hope we can guide you.