Multibeam data were collected during R/V Heincke cruise HE508 with echo sounder system Kongsberg Simrad EM710. Data recording was executed in North Sea around island Helgoland. Data are unprocessed and may contain outliers and blunders. Therefore the data should not directly be used for grid calculations and charting projects but need to be edited furthermore. One file typically contains a measurement period of ten minutes. The dataset consists of 446 files in Simrad Multibeam Processing Format (*.all) which are compressed with GZIP to size of 21.4 GB (33.2 GB uncompressed). Simrad data files can be processed using the software packages CARIS HIPS/SIPS or with the open source software package MB-System (https://www.mbari.org/products/research-software/mb-system/).