This dataset contains the Underway (UWY) data collected on Southern Surveyor voyage SS 04/2004. The voyage was conducted in two legs. Leg one form Hobart to King Island in the Bass Strait, and leg two from King Island to Sydney.The voyage covered waters off Tasmania's west coast, in Bass Strait and off the New South Wales coast in April 2004. This dataset has been processed and is archived within the CSIRO Marine and Atmospheric Research Data Centre in Hobart. Additional information regarding this dataset is contained in the voyage plan and voyage summary. The standard Underway (=continuously recorded) dataset from a research voyage includes Navigation (NAV), Sounder (PDR), Thermosalinograph (TSG) and Meteorological (MET) data. NAV data includes GPS (Global Positioning System) measurements of latitude, longitude, ship's direction and speed. MET data may include atmospheric temperature, humidity and pressure, wind speed and direction, and incident radiation intensity. The data are available at 10 second intervals in the NetCDF file, or at five minute intervals in the standard ASCII file.