Sustained monitoring of the EAC: mass, heat and freshwater transports

Recovery and re-deployment of the East Australian Current (EAC) mooring array.
Voyage No


07 May, 2021


03 Jun, 2021




Chief Scientist

Dr Chris Chapman



Research voyage to the East Australian Current (EAC) off Brisbane to maintain a long-term deep-water mooring array for monitoring of ocean and climate.

The long-term ocean monitoring by the EAC deep-water mooring array, a component of the Integrated Marine Observing System (IMOS), is central to our understanding of the relationship between global ocean and climate variability. The EAC is the complex and highly energetic western boundary current of the South Pacific Ocean.  It is the dominant mechanism for the redistribution of heat and freshwater between the ocean and atmosphere in the Australian region.  

The primary voyage objective is to recover and re-deploy six deep-water moorings in waters off Brisbane from the continental shelf (500 m depth) to abyssal waters (5000 m depth).

There are four other projects included on this voyage:

  • Dynamics of larval fish diversity for ocean observing off North Stradbroke Island (Prof Iain Suthers, UNSW): Survey of plankton and larval fish to better understand biodiversity and factors influencing productivity in continental shelf waters.
  • Argo float deployments (Dr Beatriz Pena-Molino, CSIRO): Up to six core Argo floats will be deployed during the voyage as part of the international Argo program.
  • Biogeochemical-Argo float deployments (Dr Peter Strutton, UTAS): Two BGC-Argo floats will be deployed during the voyage as part of the Australian contribution to global Biogeochemical-Argo program.
  • Expendable Bathythermographs deployments (Rebecca Cowley, CSIRO): Expendable Bathythermographs (XBT) will be regularly deployed during the transit from Hobart to the mooring sites as part of the Global Temperature and Salinity Profile Programme  (GTSPP).

The science team on this voyage will have 29 science participants (and 20 crew) representing six institutions.

COVID-19 Protocols

To safeguard the health and well-being of participants, strict COVID-19 protocols will apply to all activities on this voyage, including testing of all participants for COVID-19 prior to departure.

For further information about the MNF COVID-19 Protocols, visit Restart of at-sea operations following COVID-19 shutdown

Voyage outcomes

Summary of voyage outcomes - and voyage image gallery - will be published approximately 3-6 months after the completion of the voyage.