Duisport – Duisburg Hafen AG, the owner of the public Port of Duisburg has decided to upgrade their survey capability from a previously used single beam echosounder to the wide swath bathymetry system GeoSwath Plus. The system provides full bathymetry coverage of the harbour basins with unprecedented resolution, while at the same time cutting down on survey time. The side scan data that is co-registered with the system can also be used to detect debris as well as mapping bottom types. The data provides the basis for monitoring and maintaining the most important asset of a port, its basins and shipping channels.