https://doi.pangaea.de/10.1594/PANGAEA.993672Hennke, AnneAnneHennke0009-0000-4989-0161GEOMAR - Helmholtz Centre for Ocean Research KielStauffer, Julian BJulian BStauffer0000-0001-5657-0422GEOMAR - Helmholtz Centre for Ocean Research KielGazis, Iason-ZoisIason-ZoisGazis0000-0002-3925-859XGEOMAR - Helmholtz Centre for Ocean Research KielMohrmann, JochenJochenMohrmannGEOMAR - Helmholtz Centre for Ocean Research KielPANGAEA2026ALKORBaltic SeaMBESMultibeam EchosounderROVKASCHUFIBinary ObjectBinary Object (Media Type)Binary Object (File Size)Raster cell sizeFile contentVertical datumHorizontal datumHorizontal datum, projection stored in fileLongitude, westboundLongitude, eastboundLatitude, southboundLatitude, northboundUTM Zone, Universal Transverse MercatorUTM Easting, Universal Transverse MercatorUTM Northing, Universal Transverse MercatorElevation, minimumElevation, maximumKongsberg EM2040 multibeam echosounder (Kongsberg Maritime)Extracted from fileAL644Alkor (1990)2025-11-17T09:42:00/2025-11-28T02:07:04Dataset10.1594/PANGAEA.992000255 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalSwath sonar bathymetry data recorded during AL644 on RV ALKOR using the hull-mounted Kongsberg EM2040 multibeam echosounder. The cruise took place between 17.11.2025 - 28.11.2025 in the German Baltic Sea. The approximate depth range of the mapped areas is between 10-30m. To improve MBES data quality, sound velocity profile (SVP) casts were conducted in the vicinity of the mapped area prior to and after each survey using a CTD. The data set includes data from the 'Adlergrund' (ADG), located within the Pommeranian Bay/Rønne Bank Nature Conservation Area (NCA), from the 'Kadet Trench ('KDR') NCA and the Fehmarn Belt ('FB') NCA. The mapping has been conducted for baseline habitat studies in the area. Data were manually edited for false measurements using Qimera (https://qps.nl/qimera/#). A raster was calculated and stored in GeoTIFF format with a 0.5 m resolution (negative values), WGS84 as vertical datum and UTM as a projection. The mapping has been conducted for baseline habitat studies in the area.These data should not be used for navigational purposes.10.035910.919954.534854.5922Bundesamt für Naturschutzhttps://doi.org/10.13039/501100010415352520010ASCHUFI - Support in the development of measures and implementation of protection concepts for fishBundesamt für Naturschutzhttps://doi.org/10.13039/5011000104153525NK3020ROVKA - Reefs of the Baltic Sea - Occurrence and climate protection performance of Fucus and Saccharina in the German EEZ