What if a shoe could save your life when you are stuck in a building that is burning down? Though it sounds like a science fiction, the OpenShoe project aims to do exactly that! Built on a novel navigation technology called Inertial Navigation System (INS), researchers have built a minute navigation module that can be plugged into a shoe to track every step to the accuracy of a centimeter! Such foot-mounted systems help in tracking objects in the absence of satellite based navigation and would complement the widely used satellite based navigation systems, say the researchers.