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The primary aim of the acoustic survey was to describe the distribution and abundance of Antarctic krill (Euphausia superba) in CCAMLR Division 58.4.2. However, these data are also relevant for studies of other sound-scattering targets detected by the echosounder system, for example other pelagic taxa or the seafloor. \nThe dataset is a collection of .csv data files, .ev processing files and *.pdf documentation files, organised into 4 categories:\n\nAcoustic survey: data files relating to the transects undertaken for the acoustic survey 2. Acoustic data processing: metadata files, processing templates and documentation relating to the collection and processing of the acoustic data 3. Acoustic results: results arising from the processing of the raw data. The raw data are described in a separate metadata record - \"AAD Hydroacoustics hard disks - data collected from Southern Ocean cruises...\" 4. 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