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 multibeam echosounder data collected on RV Investigator voyage IN2015_V02, which departed Sydney on 15 May 2015 and arrived in Brisbane on 26 May 2015. The Kongsberg EM170 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information off Fraser Island , surveying for suitable mooring locations. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 20 files totalling 2.61 GB of raw data in this dataset. Processed data are available in XYZ format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_V03, which departed Brisbane on the 3rd June 2015 and arrived Sydney on 18th June 2015. The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information in Tasman Sea. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 168 files totaling 18.4 GB of raw data in this dataset. 31 sound velocity profiles were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_V03, which departed Brisbane on the 3rd June 2015 and arrived Sydney on 18th June 2015. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information in the Tasman Sea. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 368 files totalling 18.2 GB of raw data in this dataset. 31 sound velocity profiles were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_E06, which consisted of three legs, 5-8 Oct 2015, 9-11 Oct 2015 and 12-16 Oct 2015, in and out of Hobart. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information out to deep water 42-43 S. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 47 files totaling 1.24 GB of raw data in this dataset. 24 sound velocity profiles were applied to this data during data acquisition. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_V02, which departed Sydney on 15 May 2015 and arrived in Brisbane on 26 May 2015. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information off Fraser Island out to the abyssal plain, surveying for suitable mooring locations. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 167 files totalling 4.66 GB of raw data in this dataset. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

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.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_E02, which departed Hobart 2015-04-07 and returned on 2015-04-14. The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information along the south coast within the Huon MPA. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 39 files totaling 3.3 GB of raw data in this dataset. The acquisition PC failed mid voyage and no data was acquired within the seamounts region within the MPA. Sound velocity profiles using sea surface temperature were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_T02, which departed Sydney 2015-06-22 and arrived Hobart on 2015-06-26. The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information along the shelf and slope from Sydney to Hobart. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 62 files totaling 5.2 GB of raw data in this dataset. Sound velocity profiles using sea surface temperature were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam 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 Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information in from Hobart to Antarctic waters. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 389 files totalling 11.4 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.