The availability of GPS Satellite Navigation System has increased and one can get both portable types and stationary units suitable for your needs. The portable types are very handy and small in size. It can be used even while going for a walk to a specific location. It again provides you with the added benefit of focusing on your speed and distance with the special options provided. These models are the cheapest available among the models in the market.

One next model will be a Satellite Navigation that lets you store a point of interest or a particular area of interest like a town or a shopping centre. These models can be connected to a PC so that you can download some additional points of interest or places to the internal memory of this GPS. As this model has many options they cost higher than the portable models which are small and handy.

A different model that is very much popular nowadays is the one that is found in the cars for navigating roads. These GPSs are placed on the windows or dashboards of the car so that it can be viewed easily and a very helpful one for the drivers making it easy for them to choose the best or easiest route available. Some models bigger than the handy ones are provided with voice guided options, these are capable of giving you the current position of traffic and can also be connected to your computer. Make sure that you purchase an authorized satellite navigation system without falling into duplicates for cheaper rates.

• Display
Different types of GPS models come with different displays. Mostly they have a grey display with a back light hence it is not easy to get a good display in it during dark conditions. But colour displays often give good clarity picture. In the case of colour display the battery life is shorter. In most of the cases the average size of the screen one could get for a GPS is 2-3 inches, but this will be smaller again when it comes to handy and portable GPS. But a Chart Plotter can give a much bigger screen as it’s added with other options too.

• Special features
GPS is made of waterproof units to suit your requirement. For this purpose you should choose a GPS that comes with an IPX7 rating which can be put up to 3 feet of water for a time period of an hour and more. But if your choice is of an IPX4 rating then make sure the GPS unit is kept out of reach of water as it is not water resistant. Hence make sure of your purchase depending on your need and give importance to the product make and options when you make up your mind to buy a GPS unit for you.
Another model of GPS that is used for water navigation is Chart Plotter GPS Systems which comes with additional options like finding the depths of the water, finding tide tables, checking the temperature of water. This GPS includes features with which fishermen can find out places of fish schools or find areas of mass fishes and also helps people connected to marine industry a lot.

• Memory
Memory is one important feature that you should not ignore while looking for a GPS. Most of the GPS units provide 32 MB of storage capacity, but this memory is considered to be good or average depending on your need again. You can either choose a GPS that will support external memory or can be connected to a PC to provide the same. For this you have to choose a model that supports the required extra memory to match your needs. Bluetooth and USB facilities are available in GPS units nowadays.
The GPS system functions by receiving signals from the satellite and hence is the best to use when navigating through a new way