A Satellite Navigation system or Satnav in short, is also called as a Global Positioning System (GPS) that helps to trace a particular route with the help of the workings of many satellites that are positioned around our earth. The various satellites are in different positions and so it helps the Satnav to locate a particular area clearly, by combining the works of various satellites.
The Satnav has aerials that are attached to it, which help in receiving the signals from the satellites. They contain various maps that come with easy-to-understand symbols and marks that can be used to read the map easily. Satnavs come in various types like handheld varieties, in-car fixed varieties, Chart Plotter GPS systems etc. the handheld ones are quite easy to carry and also are ultra portable and smaller in size that can also be placed inside our pockets as well. They give quite accurate results and since they are portable, are easy to carry as well.
The in-car types are the ones that can be used inside cars. They have comparatively big displays that are easy to be viewed while driving. They can usually be mounted over the windows or dashboards of the car, so that they are easily accessible by the driver of the car. The chart plotter GPS systems are used in the water navigation fields. Apart from having the same features that a road navigation system has, they also have additional features, as they have to be used during navigation. Features like depth finders, tide readers, temperature gauges, fish finders etc are available, which prove quite useful when on the waters.
Satnavs are quite useful, especially places that are new or are difficult to be explored. Also chart plotter GPS systems are a boon to the sailors to find their way through the sea and also for fishermen to know more about the fish schools etc.
Visit satellitenavigation.org.uk for detailed information about TomTom, Magellan, Garmin sat nav manufacturers and read GPS Buying Guide.