When GPS first came on the scene, the revolutionary technology was thought of as the ultimate navigation solution. It turned out to be a little more complex than that. GPS alone works great if you are in a satellite visible area with a strong signal, however there are many scenarios in the modern world where this is not the case. GPS can be shaky at best in environments such as downtown cores with towering skyscrapers, forest canopies that can block the signal, and remote locations such as mountain valleys.
To combat these difficulties, a Canadian team based in Calgary have obtained key patents and founded a business based on navigating with Inertial Sensors when GPS/GNSS signals are disrupted or simply unavailable. Coincidentally, cellphone and tablet manufacturers began adding these same sensors to their devices to allow users to easily re-orient their screens and play motion-controlled video games.