Accurate positioning and navigation are the purpose of GPS systems. They were created in the early 1970's by the Department of Defense, and were mainly created to help soldiers and military vehicles, ships and planes to know their locations anywhere in the world. Today, GPS navigation systems are also used for commercial and scientific purposes. Commercially, GPS is used by boats, airplanes and other vehicles. Hiking, kayaking and fishing are other uses for it. Scientifically, GPS is essential for earth sciences. GPS navigation can also be used to study earthquake events and potential activities, weather forecasting and global climate studies by meteorologists.

GPS navigation systems are now being used by more and more civilians. They have proven to be extremely useful in many different situations. They now come in several different designs, functions and features.

You have no doubt heard of in-car GPS systems and portable directional devices, but how do you chose which one to use? Pricing is one of the most obvious differences between the two options. Portable GPS devices that can be used in more than one vehicle are usually less expensive than built-in models. One portable GPS system, the Garmin Nuvi 350, has most of the same features of other in-car systems, and is in the $200 range. If you must have the latest extras, such as Bluetooth capabilities, the Garmin Nuvi can accommodate you if you are willing to spend a little more. The Garmin Nuvi 350 model employs NAVTEQ mapping features in addition to carrying a relatively low price tag.

When looking for GPS systems, it will all seem confusing at first due to the wide variety of pricing, features and brands. In fact there are probably hundreds of models available today. Also, the price can range anywhere from $150 to $900! When searching for a GPS system, you first have to know what options are available. Do you want just a standard system that can help you travel from one place to another, or do you want something more sophisticated with additional capabilities? If you're just needing something basic, then you should look at a price range that is below $500.

Look around the Internet and local shops and check out some GPS brands. You may ask salesclerks what the most popular systems are. Once you've gotten an idea about the popular GPS systems, you may then evaluate the cost, quality and options. Jot down what you think are your top brands and narrow down to about 5 or less. Search for reviews and ratings for those brands/models online. Reading what other buyers have to say will give you an idea whether you should go for a certain model or not. You can even ask for advice from other people in online forums. Additionally, you should as for recommendations from people you trust and have bought GPS systems, such as family, friends and colleagues.

GPS Navigation Systems are devices that provide navigation and accurate positioning information. An example of a portable device is the Garmin Nuvi GPS System which costs about two hundred dollars but has almost as comprehensive features as most in-car GPS devices do.