Nu-Shuttle Transect Data The Narragansett Laboratory of NMFS has established an ecological monitoring program for Narragansett Bay. Once every month a heavily instrumented oceanic sampler is towed on a circular transect through the East and West Passages, Rhode Island Sound, Mount Hope Bay and the Providence River. The instruments undulate through the water column recording data including time, position, depth, temperature, salinity, chlorophyll fluorescence, dissolved oxygen concentration, primary productivity, zooplankton concentration and size distribution. The data is being used to establish a baseline for assessing changes in the structure and functioning of the Narragansett Bay ecosystem. For more information, please visit the the Narragansett Bay Project.