This record describes echosounder data collected on the Marine National Facility RV Investigator voyage IN2015_V01. This is the first research voyage for the RV Investigator departing Hobart on the 21 March and returning to Hobart on the 30 March, 2015. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 145 files totalling 3.69 GB of raw data in this dataset. GSF files of the data are also available. Sound velocity profiles were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes echosounder data collected on the Marine National Facility RV Investigator voyage IN2015_V01. This is the first research voyage for the RV Investigator departing Hobart on the 21 March and returning to Hobart on the 30 March, 2015. The Simrad EK60 split beam echosounders, 38, 70, 120, 200 and 333 KHz were used to acquire water column and bathymetry data. Data are stored in .raw .bot and *.idx format at CSIRO Oceans and Atmosphere. There are 747 files totalling 15.9 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes echosounder data collected on RV Investigator voyage IN2015_E01, which departed Hobart on the 29 Jan 2015 and returned to Hobart on the 19 Feb 2015, after successfully testing equipment at 65° south. The Simrad ME70 echosounder was used to acquire water column data between Hobart and Antarctica. Data are stored in Simrad *.raw raw format at CSIRO Oceans and Atmosphere. There are 57 files totalling 43.4 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes echosounder data collected on RV Investigator voyage IN2014_E04 which departed Hobart on the 26 Nov 2014 and returned to Hobart on the 28 Nov 2014. The Simrad ME70 echosounder was used to acquire water column data in Storm Bay and east of Hobart. Data are stored in Simrad *.raw raw format at CSIRO Oceans and Atmosphere. There are 23 files totalling 20 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes echosounder data collected on RV Investigator Event voyage IN2014_E03 which departed Hobart on the 10 Nov 2014 and returned to Hobart on the 17 Nov 2014. The Simrad ME70 echosounder was used to acquire water column data in from the East Coast of Tasmania. Data are stored in Simrad *.raw raw format at CSIRO Oceans and Atmosphere. There are 101 files totalling 9.45 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes echosounder data collected on the Marine National Facility RV Investigator voyage IN20Y15_V03. This voyage took place from Brisbane to Sydney between 3rd June 2015 and 18th June 2015. The Simrad EK60 split beam echosounders 18, 38, 70, 120, 200 and 333 KHz to acquire water column and bathymetry data. Data are stored in .raw .bot and *.idx format at CSIRO Oceans and Atmosphere. There are 1179 files totaling 80.6GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes echosounder data collected on the Marine National Facility RV Investigator voyage IN2015_V02. This voyage took place from Sydney to Brisbane, 15-26 May 2015. As the ADCP's were being tested, the EK60 was not pinging for most of the time to prevent interference. Data are stored in .raw .bot and *.idx format at CSIRO Oceans and Atmosphere. There are 380 files totalling 9.93 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes multibeam echosounder data collected on the Marine National Facility RV Investigator voyage IN2015_V01. This is the first research voyage for the RV Investigator departing Hobart on the 21 March and returning to Hobart on the 30 March, 2015. The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information when in water less than 1000 m. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 19 files totaling 3.48 GB of raw data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes echosounder data collected on RV Investigator voyage IN2015_E01, which departed Hobart on the 29 Jan 2015 and returning to Hobart on the 19 Feb 2015, after successfully testing equipment at 65° south. The Simrad EK60 split beam echosounders 38, 70, 120, 200 and 333 KHz were used to acquire water column and bathymetry data between Hobart and Antarctica. Data are stored in .raw .bot and *.idx format at CSIRO Oceans and Atmosphere. There are 906 files totalling 43.1 GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_E01, Triaxus Sea Acceptance Testing & Calibrations Voyage, which departed Hobart on the 9th June 2018 and returned to Hobart on the 11th June 2018. The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information for a small area off the southeast coast of Tasmania. The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz. Data are stored in *.all raw format for bathymetry and backscatter at CSIRO. There are 7 files totalling 2.19 GB of raw data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position. Tide corrections were not applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.