This record describes sub-bottom 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 Kongsberg SBP120 (Sub bottom profiler) was used to acquire data along the East Coast of Tasmania. Data are stored in .raw raw and .seg segy formats at CSIRO Oceans and Atmosphere. There are 82 files totalling 5.17 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 sub bottom 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 SBP120 (Sub bottom profiler) was used to acquire data south west of Tasmania. Data are stored in .raw raw and .seg segy formats at CSIRO Oceans and Atmosphere. There are 53 files totaling 3.08 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 sub-bottom data collected on RV Investigator voyage IN2015_V02, which departed Sydney 15 May 2015 and arrived in Brisbane on 26 May 2015. The Kongsberg SBP120 (Sub bottom profiler) was used to acquire data through out the voyage. Data are stored in .raw (15 files 4.62 GB) raw and .seg (15 files 4.6 GB) segy formats at CSIRO Oceans and Atmosphere.

This record describes sub bottom profiler data collected on RV Investigator voyage IN2016_V02, which departed Hobart on the 14 March 2016 and returned to Hobart on the 16 April 2016. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data through the voyage. Data are stored in .raw (37 files 3.2 GB) raw and .seg (37 files 3.2 GB) segy formats at CSIRO Oceans and Atmosphere.

This record describes sub-bottom data collected on RV Investigator voyage IN2015_V03, which departed Brisbane 3rd June 2015 and arrived Sydney on 18 June 2015. The Kongsberg SBP120 (Sub bottom profiler) was used to acquire data in Tasman Sea. Data are stored in .raw raw and .seg segy formats at CSIRO Oceans and Atmosphere. There are 156 files totaling 8.57GB of raw data in this dataset. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

This record describes sub bottom profiler data collected on RV Investigator voyage IN2017_E04, Trials voyage, which departed Hobart on the 7th of December 2017 and returned to Hobart on the 11th of December 2017. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP120 was logged sporadically for the extent of the voyage. Data are stored in .raw (17 files 1.83 GB) raw and .seg (17 files 1.88 GB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude and time variable gain. 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 sub bottom profiler data collected on RV Investigator voyage IN2021_E01 (Trials and Calibration), which departed Hobart on the 10th November 2021 and returned to Hobart on the 14th November 2021. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP120 was logged [continuously/sporadically] for the extent of the voyage. Data are stored in .raw (596 files, 1.81GB) raw and .seg (595 files, 1.8 GB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, bandpass filter (for depths < ~200m) or matched filter with replica shaping (for depths > ~200 m), and time variable gain. No attribute calculation for instantaneous amplitude was applied. 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 sub bottom profiler data collected on RV Investigator voyage IN2016_E02, 'MNF Equipment Sea Trials' which departed Sydney on the 16th December 2016 and returned to Hobart on the 20th December 2016. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP120 was logged sporadically for the extent of the voyage. Data are stored in .raw (65 files 2.49 GB) raw and .seg (65 files 2.48 GB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude and time variable gain. 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 sub bottom profiler data collected on RV Investigator voyage IN2016_E01, 'East Tasman Plateau – key to unravelling the onset of the Antarctic Circumpolar Current/MNF Equipment Sea Trials,' which departed Hobart on the 17 August 2016 and returned to Hobart on the 22 August 2016. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP120 was logged continuously for the extent of the voyage. Data are stored in .raw (41 files 1.33 GB) raw and .seg (42 files 1.34 GB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude, time variable gain and a 2 ms mute. 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 sub bottom profiler data collected on RV Investigator sea trial voyage IN2015_E04, which departed Hobart 2015-04-25 and returned on 2015-04-28. The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP120 was logged for a few hours while testing for acoustic interference (01:30 2016-04-26 - 11:15 2016-04-26) Data are stored in .raw (8 files 454 MB) raw and .seg (8 files 448 MB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude and time variable gain. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request