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Coastal Waters (Australia) | Tasmania Coast North, TAS
43 record(s)
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This record describes multibeam echosounder data collected on Bluefin voyage BF2018_V01, 'Hydrographic survey of the Petuna Aquaculture Sites in SW Bass Strait' which departed Stanley, Tasmania on the 27th June 2018 and returned to Beauty Point, Tasmania on the 4th July 2018. This survey was a part of a broader mapping campaign that involved a survey of the Boags Commonwealth Marine Reserve. The Kongsberg EM2040c multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter at the Boags Marine Reserve in the Bass Strait. The EM2040c provides a 1.3° by 1.3° transmit and receive angular resolution respectively. The echosounder's nominal frequency was 300 kHz and was operated in dual swath mode. Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 269 files totalling 73.6 GB of raw .all data, and 269 files totalling 0.64Tb of raw .wcd in this combined campaign 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 final processed dataset. Instead the data was mapped to the ellipsoid (GPS Height) and thereafter reduced to AHD (Australian Height Datum) using the AusGeoid09 model. 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 reports. Additional data products may be available on request.
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This record describes multibeam echosounder data collected on voyage BF2020_v01 aboard the AMC's vessel the Bluefin. The vessel departed Beauty Point on the 11/08/2020 and returned to Beauty Point on the 17/08/2020. The Kongsberg EM2040c multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter. The survey area was ~4km to the south east of Golden Beach was ~6.2 km x ~15.4 km. (Area surveyed including turns totalled 103.7 km2). This survey area encompasses previously surveyed areas (2017 and 2018) and extended seaward to a depth of 26m. The EM2040c provides a 1.3 degree by 1.3 degree angular resolution. The echosounder's nominal frequency is 300 kHz and it operated in dual swath mode. This project also utilised a dual head arrangement enabling a greater swath coverage. Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. Raw data files include: - 545 *.all files totalling 195GB - 513 *.wcd files totalling 1.35TB Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position. Processed data was corrected to AHD utilising the AusGeoid2020 geoid model. Processed data had outliers removed. Processed line data are available in *.gsf format, and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset, including information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.
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This record describes multibeam echosounder data collected on voyage BF2022_V01 aboard the AMC's vessel the Bluefin. The vessel departed Beauty Point on the 28/02/2022 and returned to Beauty Point on the 21/03/2022. The Kongsberg EM2040c multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter. The surveyed areas include Zeehan Marine Park, west of King Island and the Franklin Marine Park, west of Marrawah (NW Tasmania). A total surveyed area was 1026.2 km² not (including transits) comprising Zeehan Marine Park 726 km² and Franklin Marine Park 300.2 km². The EM2040c provides a 1.3 degree by 1.3 degree angular resolution. The echosounder's nominal frequency is 300 kHz and it operated in dual swath mode. Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. Raw data files include: - 751 *.all files totalling 237GB - 728 *.wcd files totalling 1.55TB Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position. Processed data was corrected to MSL utilising the EGM2008 geoid model. Processed data had outliers removed. Processed line data are available in *.gsf format, and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset, including information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.
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This dataset comprises the current meter data collected from Devonport (Tasmania) during March-July 1992, as part of a study of ocean currents in Bass Strait in relation to potential effluent dispersal. There are 3 moorings with 3 current meters represented in this dataset. Parameters typically recorded in current meter data comprise east-west and north-south velocity components, water temperature, pressure, and salinity at a nominal depth for each current meter. The data have been processed and are archived as part of the holdings of the CMR Data Centre in Hobart.
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This voyage provides an opportunity to test and refine optimal techniques to map and assess seabed habitat developed in a previous CMR project (NOO OP2000-SE02). Importantly, this voyage will use the National Facility's high-resolution EM300 swath mapper for its first program of biological and physical habitat mapping. The sampling locations are a number of submarine canyons and their immediately adjacent flanks on the west coast of Tasmania and east of Bass Strait. These are prime targets for our methods development because each canyon area is characterised by a great variety of seabed topography and benthic communities concentrated in a relatively small area (< 300 sq km). This voyage is also an opportunity to apply the data collected to marine resource management planning in the South East Region. Submarine canyons represent a type of habitat unit ("Level 3 biogeomorphic units") having a strong influence on the location of offshore Marine Protected Areas on the continental slope and rise, and many are likely to be biodiversity "hotspots". Several canyons are also the locations of the largest known aggregations of feeding and spawning fishes in the South-East Fishery region, and these support a range of intense, increasing and, in places, conflicting fishing activities. Given the immediate and increasing relevance of submarine canyons to conservation and fishery managers, it is then surprising to realize that virtually all those in the SE region remain unsampled by scientists, and are named only by commercial fishers. For these reasons, sampling on this voyage will focus on the "Big Horseshoe Canyon" mapped previously with the EM1002 and EM12 swath instruments (to enable comparison of data types, and to investigate temporal persistence of features), and several "new" areas. Sediment samples were taken for analysis by Geoscience Australia.
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Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).
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Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).
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Pilot data collection excercise to collect Simrad ES60 38kHZ vertical acoustic data from an industry vessel to assess the data management/quality issues and the suitablity of the vessel as an acoustic platform. A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545). 8 gigabytes of full sample rate ES60 data collected during the three day voyage.
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Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).
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Pilot data collection excercise to collect Simrad ES60 38kHZ vertical acoustic data from an industry vessel to assess the data management/quality issues and the suitablity of the vessel as an acoustic platform. Trips PEX200101 to PEX200104 tested the ES60 system. Trips PEX200105,06 and 07 are the main trips of interest where the Tasmanian east coast the roughy grounds were fished. A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545). 4.7 gigabytes of full sample rate ES60 data collected during the voyage.