Global Positioning System

What do you think would happen if the Global Positioning System stopped working, at least at full capacity? How would such a scenario impact you directly and indirectly? The global navigation system would not work if the GPS stopped working at least at full capacity. This would impact me directly because I rely on GPS for travelling to new areas all the time and if it stopped working I would get lost or reach somewhere else. What industries would be impacted by sudden deprivation of access to GPS?  What would be the effect on navigation at sea and in the air, and how would other kinds of travel be disrupted?  What would be the military implications if the world were suddenly deprived of GPS?  How would all of these factors affect your own life?