Examples disclosed herein relate to methods and apparatuses for observing signals transmitted by one or more transmitters in an asynchronous communication network and applying a time reference to generate a clock model. The axial bearing has a multi-sided outer contour. Thereafter, the sacrificial layer is selectively decomposed at a temperature less than the temperature required to thermally decompose the sacrificial layer by selectively exposing the sacrificial layer to UV radiation. In addition, the operations centre compares the calculated dynamic road route with the static road route and transmits information associated with a road route that is selected on the basis of the comparison to the onboard navigation unit. The user can select a media item in the defined section for further view or other actions.