Picture yourself crashed in the middle of a sinister desert, lost. No map can help you. In your hand are only some food, well enough to maintain your life, and a phone, in good shape. So you sit back and wait for your rescue team. Wait! How can you locate yourself precisely and lead the team to where you are? You are just as pathetic as you have nothing! However, matters change if you have a GPS receiver with you. You can track yourself down with an accuracy of up to 5 meters. You can heroically tell the pilot where you are and your chance to being rescued is really high.

In this site, you will learn the astonishing fact of how the GPS system is affecting the world. GPS has penetrated into each and every aspect of our life, from transportation to construction to agriculture to mining to even entertainment. Just imagine your life without the existence of this seem-to-be-versatile system, how can it be worse than that?

Maybe you still lack of idea on the system itself. Don't panic, you will find detail yet easily understandable description concerning the working principle of the system in our site. And the animations we provide will further visualize the handy stuffs you have got. Trust us, everyone of you can be a quick expert for our site which contains nothing but everything!

	We now have an Flash animation in the “How it works” section, to further illustrate the fundamental principals behind GPS. >>Watch the animation!
	While you're at it, why don't you check out our interactive Hangman game? >>Play the hangman game!
	There are many other interactive elements, make sure you won't miss them out! >>View all interactive elements

In each page, you may found the following tools helpful:

	This bookmarking tool let you bookmark your favourite page quickly.		Found uncertaincy to some of the wordings? Use the dictionary to seek an explanation!
	Invite a friend to visit this page by sending them an Email .		The printing function allows you to view the page in anytime and anywhere.