Supported by an intelligent assistance system, the sustainability and digitalisation of the tideindependent Industriehafen Bremen can be increased. To guarantee port security, a constant level of the isolated harbour is essential. There is great potential for increasing energy efficiency if the lock naturally waters the harbour basin at times of high tide instead of employing a pump station. This contribution shows how artificial intelligence and innovative software systems were used to develop an assistance system to improve existing procedures without making extensive changes to the existing port infrastructure. (Only in German)