The Multidisciplinary Underway Network sub-facility is operated by CSIRO Marine and Atmospheric Research and builds on observations collected from expendable bathythermographs (XBTs) deployed on volunteer merchant ships since the 1980s.  The network continues to support these observations and now provides high-resolution transects four to six times a year across the oceans surrounding Australia.  Furthermore, it has expanded to include carbon dioxide concentration and plankton assemblage measurements on some routes.  The Multidisciplinary Underway Network encompasses three sub-facilities, distinguished from each other based on the instrumentation they maintain;

• Expendable Bathythermograph
• Biogeochemical Sensors
• Continuous Plankton Recorder