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The voyage took place between November 14 and November 26, 2017 departing from Fremantle (WA) and arriving in Hobart (TAS). \nThe Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information. A total of 1,711 km was covered, primarily used for mapping the continental shelf and the top of the canyons within the sampling area in addition to being the primary sounder in shallow water.\nThe EM710 provides a 0.5\u00b0 by 1\u00b0 transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 70 to 100 kHz.\nData are stored in *.all raw format for bathymetry and backscatter at CSIRO. There are 164 files totalling 24.9 GB of raw data in this dataset.\nSound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format is corrected for motion and position.\nTide corrections were not applied to the processed data. Processed data had outliers removed. 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