Kingdom Project: The acquired seismic data (Profile line GeoB19-112) has been processed for boulder detection with a custom diffraction imaging algorithm and the results for a small area of interest are presented in the attached Kingdom Project. A session file and a custom color bar are given to reproduce figures. Seismic Data: Boulder detection results of Profile GeoB19-112 in SEGY format as weighted and unweighted amplitudes with standard SEGY Trace Headers and World File with georereferencing information. MBES: Raw multi-beam echo sounder data from the field campaign He525.

Ultra high resolution multi channel seismic and multi-beam echo sounder data has been collected during the expedition He525 with R/V Heincke in March 2019 to conduct a feasibility study on boulder detection in the shallow sub-seafloor with beamforming on ultra-high resolution seismic data. The campaign of one week took place in the north of Helgoland in the German North Sea sector.