A MEM, or Micro-Electro-Mechanical Systems type of gyroscope, is very helpful for navigation. It works by sending vibrations which tell a lot. It works, overall, by sensoring nclinometers and accelerometers. It is very cost effective and has high precision inertial sensors within it which serve the purposes for a number of applications used in different industries.
When there is a tilt applied to the gyroscope, the mass which is suspended actually creates an electric potential difference which can be measured to reveal the change. This is very helpful in navigation and in other areas as well. The capacitance change is the actual measurement used. While the process sounds complicated, it really isn't. It is very practical, almost so simple it is complicated. The concept is basically magnetic in nature.