To get an insight into the current bathymetry and the development of sediment deposition in the waterways of Provincie Overijssel, the province has granted Aqua Vision the project of performing recurring multibeam measurements for several years over a stretch of more than 160 km. This summer the first benchmark bathymetry measurements have been successfully performed with our survey vessel. M.S. Narwal equipped with an R2Sonic2022 multibeam around the beautiful region of Weerribben-Wieden, Reevediep and Kanaal Almelo- de Haandrik.