PANGAEA_993672 Multibeam bathymetry processed data (Kongsberg EM2040 working area dataset) of RV ALKOR during cruise AL644, Baltic Sea Hennke, Anne; Stauffer, Julian B; Gazis, Iason-Zois; Mohrmann, Jochen Multibeam bathymetry processed data (Kongsberg EM2040 working area dataset) of RV ALKOR during cruise AL644, Baltic Sea 2026-05-08 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993672 Investigator Anne Hennke ahennke@geomar.de Earth Science Binary Object Binary Object (Media Type) Binary Object (File Size) Raster cell size File content Vertical datum Horizontal datum Horizontal datum, projection stored in file Longitude, westbound Longitude, eastbound Latitude, southbound Latitude, northbound UTM Zone, Universal Transverse Mercator UTM Easting, Universal Transverse Mercator UTM Northing, Universal Transverse Mercator Elevation, minimum Elevation, maximum geoscientificInformation AL644 AL644_0_Underway-7 ALKOR Baltic Sea Kongsberg EM2040 multibeam echosounder (Kongsberg Maritime) MBES Multibeam Echosounder ROVKA SCHUFI Extracted from file Alkor (1990) 2025-11-17 2025-11-28 Complete 54.5348 54.5922 10.0359 10.9199 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 255 data points text/tab-separated-values Hennke, Anne; Stauffer, Julian B; Gazis, Iason-Zois; Mohrmann, Jochen (2026): Multibeam bathymetry raw data (Kongsberg EM2040 entire dataset) of RV ALKOR during cruise AL644 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.992000

Swath 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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993672"! ** These data should not be used for navigational purposes.

http://vocab.nerc.ac.uk/collection/V12/current/L11/ Vertical datum https://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/cell-size-of-raster-data.htm Raster cell size https://doi.pangaea.de/10.1594/PANGAEA.992000 Multibeam bathymetry raw data (Kongsberg EM2040 entire dataset) of RV ALKOR during cruise AL644 https://gisgeography.com/horizontal-datum/ Horizontal datum https://gisgeography.com/horizontal-datum/ Horizontal datum, projection stored in file https://www2.bsh.de/aktdat/dod/fahrtplanung/Alkor.htm Alkor (1990) DIF 9.4 2026-05-08 2026-05-08