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GPS navigation systems are navigation and accurate positioning devices. Created by the Department of Defense in the early 1970s, GPS was primarily created to assist soldiers and military vehicles, ships and planes in precisely establishing their positions anywhere in the world. These days, the purposes of GPS navigation systems are both scientific and commercial. In the commercial world, GPS is utilized as a navigation and locating device in boats, airplanes and other vehicles. It is also extremely useful for hiking, kayaking and fishing. In the scientific world, GPS is quite essential in earth sciences. Meteorologists utilize it for weather forecasting and global climate studies. Geologists can also utilize GPS navigation when studying earthquake events and potential activities.

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.

It looks confusing when one is looking for a good GPS system because of the wide range of features, different brands and varied prices. There are hundreds of GPS systems available today varying in the price range of $150 to $900!. A very important thing to be kept in mind while looking for a good GPS system is the features available. What all features do we need? Whether our requirements are met by a standard GPS system or do we need to go in for a more sophisticated one with some additional capabilities If we need a simple GPS system we should not go for something above the price range of $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.