This record describes the Carthe Drifter data from the Marine National Facility (MNF) RV Investigator voyage IN2023_V06, titled "Understanding Eddy Interactions and Their Impacts in the East Australian Current System." The voyage took place between October 9, 2023 and November 2, 2023 (AEST), departing from Sydney and returning to Sydney. Four carthe drifters were deployed near the Solitary and Richmond Canyons to characterise near-surface circulation associated with the East Australian Current. Drifter trajectories captured the strength and variability of surface flow and cross-shelf transport, providing Lagrangian observations of EAC-driven circulation and its influence on shelf–slope exchange.

This record describes the SVP Drifter data from the Marine National Facility (MNF) RV Investigator voyage IN2023_V06, titled "Understanding Eddy Interactions and Their Impacts in the East Australian Current System." The voyage took place between October 9, 2023 and November 2, 2023 (AEST), departing from Sydney and returning to Sydney. SVP drifters were deployed to track near-surface currents and mesoscale eddy motion within the East Australian Current system, providing in-situ observations of eddy pathways, circulation, and dispersion to support studies of eddy-eddy interactions and improve ocean and climate predictions.

This record describes the Microtops Sun Photometer data from the Marine National Facility (MNF) RV Investigator voyage IN2023_V06, titled "Understanding Eddy Interactions and Their Impacts in the East Australian Current System." The voyage took place between October 9, 2023 and November 2, 2023 (AEST), departing from Sydney and returning to Sydney.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney. The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter around NSW coastal areas. 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 and *.wcd format for watercolumn backscatter at CSIRO. There are 18 files totalling 2.29 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. GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry 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 IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter around NSW coast survey area. The EM122 provides a 1 degree by 1 degree angular resolution. The echosounder's nominal frequency is 12 kHz. Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 760 files totalling 39.6 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. GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry 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 XBT data collected on RV Investigator voyage IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney. A total of 72 XBT casts were conducted over the duration of this voyage (66 were successful). There were an additional 35 auto-launcher XBTs launched for testing purposes. 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 scientific split-beam echosounder data collected on the RV Investigator voyage IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney. The Simrad EK60 split beam echosounders for18kHz and Simrad EK80 split beam echosounders for 38, 70 120, 200 and 333 kHz were used to acquire acoustic backscatter data to a range of 1500m, around NSW/VIC coastal areas. All frequencies were logged continuously for the extent of the voyage. The 70kHz & 120kHz frequencies were set to passive for the periods of shallow mapping areas of the voyage. Data are stored in *.raw, *.bot and *.idx format at CSIRO. There are 394 files totalling 35.6 GB of raw data in this dataset. No post processing has been conducted on this data. 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 IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts In the East Australian Current System." The voyage took place between October 9 and November 2, 2023, departing from Sydney (NSW) and returning to Sydney. 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 (492 files 9.12 GB) raw and *.seg (491 files 9.06 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 the Radiosonde data from the Marine National Facility (MNF) RV Investigator voyage IN2023_V06, titled "Understanding Eddy Interactions and Their Impacts in the East Australian Current System." The voyage took place between October 9, 2023 and November 2, 2023 (AEST), departing from Sydney and returning to Sydney.

This record describes the Acoustic Doppler Current Profiler (ADCP) data collected from the Marine National Facility RV Investigator voyage IN2023_V06, titled: "Understanding Eddy Interactions and Their Impacts in the East Australian Current System." The voyage took place between October 9, 2023 and November 2, 2023 (AEST), departing from Sydney and returning to Sydney. This voyage focused on mesoscale eddies, the weather systems of the ocean, that move heat, salinity, and other tracers around. They impact the ocean, ecosystems, and climate. Much is unknown about how these eddies interact with each other or how they affect the environment. This study aims to learn more about eddy‐eddy interactions and their impact on the atmosphere, ocean, and marine life in the East Australian Current System. Satellite data will be combined with ADCP, EK60, drifter, ARGO, radiosonde, CTD and Triaxus data measurements to help improve forecasts and predictions of eddy interactions. For more information please see the Processing Report (linked below). This dataset was processed (quality-controlled), and then archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).