Container Tracking System processes, analyzes and on the basis of available online data source of shipping lines and third parties evaluates the current position of ships and containers. Based on the evaluated data, the time of the expected departure of the ship from the port (ETD) and the arrival of the ship to the port (ETA) are determined. Any errors or delays in the positions of seagoing ships and containers are caused by poor quality or late availability of the source data provided by shipping lines or third parties.