This dataset contains the Underway (UWY) data collected on Southern Surveyor voyage SS 2/2009. The voyage took place in the Pacific ocean in the Lau Basin, between Fiji, Samoa and Tonga, and was conducted in 2 legs. Leg 1: 22nd April - 18th May, Leg 2: 29th May - 25th June. This dataset has been processed and archived within the CSIRO Marine and Atmospheric Research Data Centre in Hobart. Additional information regarding this dataset may be contained in the voyage plan and voyage summary. The standard Underway (=continuously recorded) dataset from a research voyage includes Navigation (NAV), Sounder, Thermosalinograph (TSG) and Meteorological (MET) data. NAV data includes GPS (Global Positioning System) measurements of latitude, longitude, ship's direction and speed. MET data includes atmospheric temperature, humidity and pressure, wind speed and direction, and incident radiation intensity. Data are recorded at 5 second intervals.