This bachelor’s thesis deals with project of inertial navigation system, composed of modules, GPS, compass, gyroscope and accelerometer. It explores communication and action between them and solves the control circuit design in the form of single-chip microcontroller. After that, appropriate combination of modules will be selected from available products and circuit connections will be proposed, supplemented by portable storage medium. After loading the firmware, this creates an inertial navigation system, which is able to write the current position to portable storage medium, even in the case of GPS signal failure