The Real-Time Air-Sea Fluxes subfacility collects and manages routine, at sea meteorological observations required to estimate bulk air-sea fluxes of momentum, heat and mass.  These included observations of wind, air and sea temperature, humidity, pressure, precipitation and long- and short-wave radiation.  Air-sea fluxes are measured on two research vessels, the Marine National Facility RV Southern Surveyor, working mainly in Australian temperate coastal waters, and the Australian Antarctic supply vessel RSV Aurora Australis, operating in waters between Australia and Antarctica.  These two vessels are equipped with automated meteorological measurement systems capable of providing high quality air-sea flux measurements on a near real-time basis.  An improved knowledge and mapping of air-sea fluxes is one of the great challenges of climate research and this sub-facility will obtain data for study of the role of the ocean on climate variability, carbon levels, ecosystems and coastal environments.