30-07-2009, 05:03 PM
Have u ever been lost and wished there was an easy way to find out which way u needed to go? How about finding yourself out hiking and then not knowing how to get back to your camp or car? Ever been flying and wanted to know the nearest airport?
Our ancestors had to go to pretty extreme measures to keep from getting lost. They erected monumental landmarks, laboriously drafted detailed maps and learned to read the stars in the night sky.
GPS is a satellite based radio navigation system which provides continuous, all weather, worldwide navigation capability for sea, land and air applications. So things are much, much easier today. For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, youâ„¢ll never be lost again.
http://pptpdf.net/subcategory.php?categ=...System.pdf
