Buying a Satellite Navigation (Satnav) system for your car.
Once they were only for rich and were only fitted in very high end cars but today SatNav systems are available to all. You can either opt for in-car fitted systems that are still quite expensive or you can go for handheld or protable units. This article is about latter.
What is SatNav?
SatNav is a system that comprises of 2 elements, a GPS data receiver and a CPU/display unit. The receiver gets information from orbiting GPS navigational satellites and communicates it to CPU/display unit. This unit is then able to find its exact location on planet by comparing signals from various satellites.
The unit incorporates road maps of area and places an indicator on map showing where car is on maps.
Features The units allow you to plan a journey ahead of time and then unit will guide you to you destination by displaying a map showing you where you are and direction you should be heading. Most now have voice instructions so unit will tell you, when you are approaching a junction, which turning you should take. The units are also capable of making real time adjustments to route, this means that if you go wrong way until will recalculate route to your destination taking into account wrong turning you have just made.
Maps The maps for unit can be loaded for different regions you visit, so they may have a map of UK and another for France and so on. Most modern unit have maps stored on a removable memory cards like SD cards or similar memory card but some units read directly from a CD or DVD. The display can be set to show conventional flat map view or new 3D view that shows a view as if it was above you and looking forward. This view is very good and clear.
Traffic Some units offer systems that will warn you of road works/traffic jams etc as they happen, and offer suggestion as to how to avoid them.
POI Most units have POI's (Points of Interest) incorporated into them that will show things like garages, restaurants, historic sites, airport and ferries etc. You can also add your own POI's of your favourite places. One POI that is very popular is location of all speed camera and accident black spot locations.