This record describes multibeam echosounder data collected on RV Investigator voyage IN2024_E01, 'Trials and Calibrations' which departed Hobart on the 28th October and returned to Hobart on the 6th November 2024. The Kongsberg EM2040-MKII multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter. NOTE: The system was newly installed in Singapore as part of the vessel's mid-life refit and this voyage constituted the formal Sea Acceptance Test (SAT) for the system. The EM2040 provides a 0.4 degree by 0.7 degree angular resolution. The echosounder's nominal frequency is 400 kHz (with a range of 200-700 kHz) and it operated in dual swath mode. Data are stored in *.kmall raw format for bathymetry and backscatter and *.kmwcd format for watercolumn backscatter at CSIRO. There are 135 files totalling 14.9 GB of raw data and 135 files totalling 287 GB of watercolumn data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.kmall format are corrected for motion and position. GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data has had outliers removed. Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report.

This record describes sub bottom profiler data collected on RV Investigator voyage IN2024_E01, 'Trials and Calibrations' which departed Hobart on the 28th October and returned to Hobart on the 6th November 2024. The Kongsberg SBP29 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP29 provides a 3° by 3° angular resolution. The echosounder's frequency sweep range is from 2 to 9 kHz. The SBP29 was logged continuously for the extent of the voyage. NOTE: The system was newly installed in Singapore as part of the vessel's mid-life refit and this voyage constituted the formal Sea Acceptance Tests (SAT) for the system. Data are stored in *.raw (50 files 859 MB) raw and *.seg (51 files 850 MB) segy formats at CSIRO. The segy format data had a real time processing stream applied, which applies gain, a gain correction, and matched filter with replica shaping (for water depths typically >200m) or Bandpass filtering 2-9 kHz (in water depths typically <200 m). 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 XBT data collected on RV Investigator voyage IN2024_E01, 'Trials and Calibrations' which departed Hobart on the 28th October and returned to Hobart on the 6th November 2024. A total of 12 XBT casts (including 2 failed/suspect cast) were conducted over the duration of this voyage. Data are stored in netCDF files at CSIRO. 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 the End of Voyage (EOV) data archive from the Marine National Facility (MNF) RV Investigator voyage IN2024_E01, titled "Sea trials & calibrations." The voyage took place between October 28, 2024 and November 07, 2024 (AEST), departing from Hobart and returning to Hobart. For further information please refer to the voyage documentation links. Instruments used and data collected include: Regular measurements: Acoustic Doppler Current Profiler (ADCP; 75, 150 KHz), CTD, Hydrochemistry, Expendable Bathythermographs (XBTs), Fisheries Echosounder (EK80), Multibeam Echosounder (EM712, EM124), Sub-bottom Profiler (SBP29), Gravimeter, GPS Positioning System, Doppler Velocity Log, Thermosalinographs (TSG), Fluorometer, Oxygen optode, Atmospheric Temperature, Humidity, Pressure, Wind and Rain sensors, Photosynthetically Active Radiation (PAR) sensor, Precision Infrared Radiometer (PIR), Precision Spectral Pyranometer (PSP), Starboard and Portside Radiometers Voyage-specific measurements: Deep Towed Camera (DTC) The archive for the IN2024_E01 EOV raw data is curated by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC) in Hobart, with a permanent archive at the CSIRO Data Access Portal (https://data.csiro.au/), providing access to voyage participants and processors of the data collected on the voyage. All voyage documentation is available electronically to MNF support via the local network. Applications to access voyage documentation by non-CSIRO participants can be made via data-requests-hf@csiro.au All processed data from this voyage are made publicly available through the MNF Data Trawler (in the related links)