PANGAEA_992689 Multibeam bathymetry processed data (Kongsberg EM 122 working area dataset) of RV SONNE during cruise SO306, east of Tanzania, Indian Ocean Bazhenova, Evgenia A; Bach, Alissa; Hassan, Md Mumit; Eberli, Gregor P; Hebbeln, Dierk Multibeam bathymetry processed data (Kongsberg EM 122 working area dataset) of RV SONNE during cruise SO306, east of Tanzania, Indian Ocean 2026-03-03 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.992689 Investigator Evgenia A Bazhenova evgeniabazhenova@gmail.com 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 Elevation, minimum Elevation, maximum geoscientificInformation Bathymetry EM122 multibeam echosounder Indian Ocean Multibeam Echosounder SO306 SO306_0_Underway-3 Extracted from file Sonne_2 2024-08-11 2024-09-07 Complete -29.629 -12.113 32.8579 45.9801 access rights needed CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) 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 12 data points text/tab-separated-values Hebbeln, Dierk; Wienberg, Claudia; Ansorge, Malte; Bach, Alissa; Bazhenova, Evgenia A; Brix, Saskia; Busse, Marc; Chioze, Ceiça; Corbera, Guillem; Dehning, Klaus; Eberli, Gregor P; Filander, Zoleka; Freiwald, André; Fröhlich, Siefke; Gigli, Federico; Gori, Andrea; Greiffenhagen, Luis; Hoffman, Leon; Jeskulke, Karen; Kalvelage, Tim; Kniest, Jorit; Korfhage, Severin; Lagunova, Nadezhda; Leymann, Tom; Meyer-Schack, Birgit; Nowald, Nicolas; Orejas, Covadonga; Pfennings, Kai; Raddatz, Jacek; Ruhland, Götz; Schwarz, Ralf; Shunula, Peter; Viadora, Rosário; Vittori, Vincent; Westbeek, Jara; Wilsenack, Maik; Yahya, Saleh (2024): Cold-Water Corals in the West Indian Ocean, Cruise No. SO306, August 8 - September 9, 2024, Port Louis (Mauritius) – Durban (South Africa). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO306, 126 pp, https://doi.org/10.48433/cr_so306 Bazhenova, Evgenia A; Bach, Alissa; Eberli, Gregor P; Hebbeln, Dierk (2024): Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV SONNE during cruise SO306 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.973306

MBES bathymetry data were collected using the ship's own Kongsberg EM 122 multibeam echosounder during the RV SONNE cruise SO306 CoWIO (Port Louis, Mauritius - Durban, South Africa). The primary goal of the cruise was to search for cold-water coral mounds in the West Indian Ocean. Data were recorded in the EEZs of Mayotte, Tanzania, Mozambique, and South Africa. These studies were endorsed as an UN Ocean Decade 2021-2030 of Ocean Science for Sustainable Development activity. This dataset includes a bathymetric grid produced based on the MBES data collected in the EEZ of Tanzania between 2024-08-17 and 2024-08-27. Postprocessing of raw .all files was performed onboard by Evgenia Bazhenova and Alissa Bach, as well as consequently by Md Mumit Hassan in the frame of his work towards the master thesis at the HCU Hamburg. The QPS Qimera software was used to 1) verify that the SVP data were applied correctly based on the time and location; 2) block outer beams and in-turn data to ensure the best possible quality of the overlapping swaths, 3) routinely clean the point cloud using the slice editor. The final grid was interpolated by applying the average interpolation type and 5 minimum neighbours. Depths measured by the MBES are reported in respect to the water level. Only static draft was taken into account. No tidal corrections were applied during the data acquisition or data postprocessing. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.992689"! ** 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.org/10.48433/cr_so306 Cold-Water Corals in the West Indian Ocean, Cruise No. SO306, August 8 - September 9, 2024, Port Louis (Mauritius) – Durban (South Africa) https://doi.pangaea.de/10.1594/PANGAEA.973306 Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV SONNE during cruise SO306 https://gisgeography.com/horizontal-datum/ Horizontal datum https://gisgeography.com/horizontal-datum/ Horizontal datum, projection stored in file https://uol.de/icbm/forschungsplattformen-schiffe/sonne Sonne_2 DIF 9.4 2026-03-03 2026-04-29