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GPS (Global Positioning System) is a satellite navigation system that provides users exact location and time information, regardless of the weather. You can find GPS or any other similar navigating systems almost anywhere and everywhere these days. From cars, boats, planes, laptops, mobile phones and more. There are a lot of different types of GPS's out there that all offer different levels of technology. But in the end it is a simple and easy thing to use. With handheld navigating devices, it's much easier to look at the screen in front of you, showing you exactly where you are than having to puzzle around a difficult map. This comes in handy when driving, since some navigating devices even talk back to you, telling you directions to go and which corner to take etc. It obviously is a safer way instead of getting distracted by the screen.
However we can't take this wonderful invention for granted. GPS navigation units will only work when they can access the network and the satellites that allow them to configure properly. This means if you're in a place where the satellites can't reach you with a signal, such as tunnels or underground etc, then you're unable to use your GPS. In situations like this it's always smart to bring a back up plan, like a map. The GPS nowadays still aren't 100% perfect, but due to the increased number of navigation satellites in the orbit, the signals and range would be a lot stronger. Also with phone navigations, as fascinating as they are, they too only work when you have internet access. The internet access must be reasonably fast as well since the refresh rate on the maps tend to be quite high. So without internet access on mobile phones such as the iPhone, GPS would be labeled as useless.
Here below are a few of the modern day GPS devices.
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| Image retrieved from http://www.navigadget.com/wp-content/postimages/2006/07/gps-navigation-system-992.jpg |
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