A Long Lines Expedition for Hydrographic stations will be made along the Greenwich meridian from 7°N to 35°S, with a port stop at Capetown, South Africa, then southward to Antarctica and westward through the Scotia Sea, ending at Punta Arenas, Chile. The work will begin in the fall of 1983 and finish early in 1984. Surface to bottom measurements of temperature, salinity, oxygen, and nutrients will be made at approximately 110 km intervals. The purpose of the expedition is to collect data to study the general circulation of the eastern South Atlantic Ocean, the Antarctic Circumpolar Current, the eastern extension of the Weddell Gyre, the flow of deep water from the Weddell Sea that extends northward east of the South Sandwich Ridge, and the regional oceanography of the Scotia Sea.