<p>This is a recent compilation of all the processed multibeam bathymetric data that Geoscience Australia holds in its database for the Bremer and Denmark Sub-Basins. The location of the sub-basin lies in deep water off the southwest margin of WA between Broke and Esperance in Southern Western Australia. <p>This dataset is published with the permission of the CEO, Geoscience Australia. <p>Not to be used for navigational purposes.

The Darwin Harbour bathymetry survey, GA-0333 was acquired by Geoscience Australia (GA), iXSurvey Australia Pty Ltd, and the Darwin Port Corporation (DPC) onboard the vessel 'Matthew Flinders' from 17 October to 07 November 2010 using GA's Kongsberg EM3002D multibeam sonar system and DPC's The specific objectives of the survey were to: 1. Obtain high resolution geophysical (bathymetry) data for Darwin Harbour; 2. Characterise substrates (acoustic backscatter properties, grainsize, sediment chemistry) for Darwin Harbour; and 3. Collect tidal data for the survey area. This V0 dataset contains a 1m resolution 32-bit geotiff of the Darwin Harbour survey area produced from the processed EM3002D sonar bathymetry data. This dataset is published with the permission of the CEO, Geoscience Australia Not to be used for navigational purposes.

The Austrea1 bathymetry survey, GA-0222 was acquired by Geoscience Australia onboard the IFREMER N/O L'Atalante from the 17th of December 1999 to the 11th of January 2000 using a Simrad EM12 Dual sonar system. The main objectives of the shipboard program are to collect seabed and sub- bottom data in specific areas off southeast Australia for marine research (geological and biological), assessment of resource potential, regional marine zone planning and management, and to support Australia's claims under UNCLOS and to map the deep water part of a marine protected area in the Great Australian Bight (GAB). This dataset contains a 100m resolution 32-bit geotiff of the Austrea1 survey, produced from the processed EM12D bathymetry data of the survey area using the CARIS HIPS and SIPS software. This dataset is published with the permission of the CEO, Geoscience Australia. Not to be used for navigational purposes.

This resource includes bathymetry data acquired during the Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey using Kongsberg EM302 and EM710 multibeam sonar systems. The Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey was led by Dr. Brendan Brooke and Dr. Scott Nichol (Geoscience Australia) with a team of scientists from Geoscience Australia, James Cook University, The University of Sydney, University of Tasmania, University of Wollongong, Queensland Museum and Parks Australia aboard the Schmidt Ocean Institute (SOI) RV Falkor from the 2nd to the 30th of August 2020. The primary objective of the survey to collect and analyze geological and biological data of the outer, deep-water edge of the Great Barrier Reef and platform reefs in the adjacent Coral Sea Marine Park. R/V Falkor’s multibeam systems were used to map the structure of the reefs, canyons, and seamounts, illuminating their formative processes. The datasets acquired will greatly improve understanding of the sedimentary processes that influence biodiversity patterns, including how canyons and platform reefs may provide a pathway for sediment to travel from coastal and shelf water to deep filter feeders. The deep and irregular canyon and platform-reef topography likely leads to direct upwelling of nutrient-rich deep waters. This dataset contains a 64m and a 16m, for water depths shallower than 2560m, resolution 32-bit geotiff of the Seamounts, Canyons and Reefs of the Coral Sea survey area produced from the processed EM302 and EM710 bathymetry data combined. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

This resource contains multibeam bathymetry data collected as part of the Darwin and Bynoe Harbour Habitat Mapping Project undertaken by Geoscience Australia (GA), the Australian Institute of Marine Science (AIMS) and the Northern Territory Government (Department of Environment and Natural Resources). The data were acquired during the period from 3 to 27 May 2016 on the RV Solander (survey SOL6432/GA04452). This project was made possible through offset funds provided by INPEX-led Ichthys LNG Project to Northern Territory Government Department of Environment and Natural Resources, and co-investment from Geoscience Australia and Australian Institute of Marine Science. The intent of this four year (2014-2018) project is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps that underpin marine resource management decisions. The specific objectives of the survey were to: 1. Obtain high-resolution geophysical (multibeam bathymetry) data for Bynoe Harbour; 2. Characterise seabed substrates (multibeam acoustic backscatter properties, seabed sediment grainsize, sediment chemistry) for Bynoe Harbour; and 3. Collect tidal data for the survey area. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; physical samples of seabed sediments, seabed still images and video footage of grab sample locations, and oceanographic information including tidal data and water column sound velocity profiles. This V1 dataset contains two 2m resolution 32-bit geotiff of the SOL6432 survey area produced from the processed Kongsberg EM2040C bathymetry data. A detailed account of the survey is provided in: Siwabessy, P.J.W., Smit, N., Atkinson, I., Dando, N., Harries, S., Howard, F.J.F., Li, J., Nicholas W.A., Picard, K., Radke, L.C., Tran, M., Williams, D. and Whiteway, T. 2016. Bynoe Harbour Marine Survey 2016: GA4452/SOL6432 – Post-survey report. Record 2017/04. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2017.004. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

This resource includes bathymetry data for Arafura Marine Park (Arafura Sea) collected by Geoscience Australia (GA) and the Australian Institute of Marine Science during the period 2 – 15 November 2020 on the RV Solander. The survey was undertaken as a collaborative project funded through the National Environmental Science Program Marine Biodiversity Hub, with co-investment by GA and AIMS. The purpose of the project was to build baseline information for benthic habitats in Arafura Marine Park that will support ongoing environmental monitoring within the North Marine Park Network as part of the 10-year management plan (2018-2028). Data acquisition for the project included multibeam bathymetry and backscatter for two areas (Money Shoal and Pillar Bank), seabed samples and underwater imagery of benthic communities and demersal fish. This bathymetry dataset contains a 6 m resolution 32-bit geotiff of the survey areas produced from the processed EM2040C Dual Head system using CARIS HIPS and SIPS software. A detailed report on the survey is provided in: Picard, K. Stowar, M., Roberts, N., Siwabessy, J., Abdul Wahab, M.A., Galaiduk, R., Miller, K., Nichol, S. 2021. Arafura Marine Park Post Survey Report. Report to the National Environmental Science Program, Marine Biodiversity Hub.

This resource includes bathymetry data acquired during the Keppel Bay 2004 bathymetry survey. Data were collected using a Reson SeaBat 8125 multibeam sonar system by Curtin University of Technology (CUT), Defence Science and Technology Organisation (DSTO) and Geoscience Australia (GA) on the charter vessel Rum Rambler during the period 20th – 26th September 2004. The survey was undertaken as a collaborative project between CUT, DSTO and GA under the Coastal Water Habitat Mapping (CWHM) Project within Coastal Cooperative Research Centre Program. The purpose of the project was to build baseline information for benthic habitats within the study area. This V1 dataset contains a 1m resolution 32-bit floating point geotiff file of the bathmetry of target areas in Keppel Bay, derived from the processed Reson SeaBat 8125 bathymetry data, using CARIS HIPS and SIPS software. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

This resource includes bathymetry data acquired during the Kenn and Chesterfield Plateaux survey using Kongsberg EM302 and EM710 multibeam sonar systems. The Kenn and Chesterfield Plateaux bathymetry survey (FK210206/GA4869); also known as Seafloor to Seabirds of the Coral Sea survey; was led by the University of Queensland aboard the Schmidt Ocean Institute's research vessel Falkor from the 06th of February to the 05th of March 2021. The primary objective of the expedition was to map underwater landscapes in the Coral Sea, collect marine magnetic data and sample micro plastics from the ocean using the Falkor's underwater system and CTD casts. Another objective was to survey seabirds species and their concentration in space and time, which are important indicators of ocean health. The data collected from the expedition will help inform future management of the Coral Sea Marine Park and the data will be added to the Nippon Foundation -GEBCO Seabed 2030 Project. This V1 dataset contains one 64m resolution 32-bit floating point geotiff files of the new Kenn and Chesterfield Plateaux bathymetry, derived from the processed EM302 and EM710 bathymetry data, using CARIS HIPS and SIPS software. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

This resource includes bathymetry data acquired during the Arafura Marine Park bathymetry survey using Kongsberg EM300 multibeam sonar system. The Arafura Marine Park bathymetry survey (SS052005/GA0282); also known as Arafura Sea survey; was led by Geoscience Australia aboard the National facility research vessel Southern Surveyor from the 30th of April to the 27th of May 2005. The primary objective of the expedition was to collect seismic and oceanographic data, mapping the sea floor and taking geological samples over various habitats. Another objective was to collect baseline information on the biodiversity of a smaller region within the Arafura Sea. This V1 dataset contains two 5m and 8m resolution 32-bit floating point geotiff files of the new Arafura Marine Park bathymetry, derived from the processed EM300 bathymetry data, using CARIS HIPS and SIPS software. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

This resource includes bathymetry data acquired during the HMAS Canberra bathymetry survey (GA-4880). Data was acquired by Deakin University on the 3rd of November 2020 onboard the M/V Yolla using a Kongsberg EM2040c sonar system. The objective of this survey was to map the HMAS Canberra wreck. The HMAS Canberra wreck is in Bass Strait between Port Lonsdale and Barwon Heads, Victoria, Australia. This dataset contains a 0.5 m resolution 32-bit geotiff of the HMAS Canberra shipwreck survey area produced from the processed EM2040c bathymetry data of the survey area using CARIS HIPS and SIPS software. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.