Hello, I'm EncMstr. Your recent edit to the page Global Positioning System appears to have added incorrect information, so I have removed it for now. If you believe the information was correct, please cite a reliable source or discuss your change on the article's talk page. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thank you. —EncMstr (talk) 05:22, 5 August 2013 (UTC)
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