This record describes Meso-zooplankton biomass and abundance data obtained with the 150 µm mesh plankton net, 30 cm net mouth diameter, ~180 cm net length, with flow meter. Six samples, collected from 4 stations on the Marine National Facility RV Investigator Event voyage IN2015_E03, a trial voyage - Acoustics and pelagic ecosystems- for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd of April, 2015.

This record describes Micro-zooplankton biomass and abundance data obtained with the 20 µm mesh plankton net, 30 cm net mouth diameter, ~180 cm net length, with flow meter. Six samples, collected from 4 stations on the Marine National Facility RV Investigator Event voyage IN2015_E03, a trial voyage - Acoustics and pelagic ecosystems- for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd of April, 2015.

This record describes zooplankton taxonomic and biomass estimate data obtained with the 335 µm mesh plankton net, 150 cm net mouth diameter. Ten samples, collected from 5 stations on the Marine National Facility RV Investigator Event voyage IN2015_E03, a trial voyage - Acoustics and pelagic ecosystems- for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd of April, 2015.

This record describes data from the Profiling Acoustic and Optical System (pAOS) collected on the Marine National Facility RV Investigator voyage IN2015_E03 Titled: Acoustics and pelagic ecosystems, testing equipment, developing procedures and sample collection, departing Hobart on the 16th April and returning to Hobart on the 23rd April, 2015. Profiling Acoustic and Optical System (pAOS) also known as Profiling Lagrangian Acoustic and Optical System (pLAOS) is a multibeam acoustics platform used for pelagic biomass studies. The system is equipped with several transducer frequencies (38kHz, 120kHz, and 333kHz), a downward looking video camera, and a downward and oblique digital stills. The system is deployed using the coring boom and allowed to free-fall from the surface to the desired depth to collect data.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_E03, which departed Hobart 2015-04-16 and returned on 2015-04-23. The Kongsberg EM7122 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information along the east coast slope offshore from Maria Island. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 20 files totaling 0.8 GB of raw data in this dataset. Sound velocity profiles using sea surface temperature were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are not yet available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes multibeam echosounder data collected on RV Investigator voyage IN2015_E03, which departed Hobart 2015-04-16 and returned on 2015-04-23. The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information along the east coast slope offshore from Maria Island. Ping rate varied according to depth. Data are stored in *.all raw format at CSIRO Oceans and Atmosphere. There are 26 files totaling 1.23 GB of raw data in this dataset. Sound velocity profiles using sea surface temperature were applied to this data during data acquisition. Tide corrections were not applied to the processed data. Processed data are not yet available in XYZ and GSF format. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products available on request.

This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator Event Voyage IN2015_E03. This is a trial voyage for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd April, 2015. CTD data is collected using a 12/24/36 bottle rosette which can include auxiliary instruments such as: ecotriplet, transmissometer and fluorometers (phytoplankton, oxygen flourescence and turbidity). CTD are sampled at specified stations (refer to map), the system can operate at a maximum depth of 6,000 metres. The 12 bottle carousel CTD is used for trace metal work. The collected data is subsequently processed and QC'd by the DAP group and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

This record describes Underway (UWY) data to be collected from the Marine National Facility RV Investigator Event voyage IN2015_E03. This is trial voyage for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd April, 2015. The UWY data from this trial voyage was assessed and will not be processed as the quality is too variable to make it feasible/useful. The unprocessed UWY data is part of the EOV archive and will not be released. Additional information regarding this dataset is contained in the cruise report for this voyage.