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This paper is one of three from NASA Langley Research Center. Together they describe a program to study pollution transport and waves in the Coastal Zone. This paper discusses the approach, the instrumentation, and the results to date of both remote and in situ sensing research at the NASA Langley Research Center. Three areas in remote sensing are singled out: The synoptic mapping of phytoplankton "blooms" by remote sensing of chlorophyll that was calibrated from in situ measurements, the development of a Multichannel Ocean Color Sensor (MOCS) that was used to map acid dumping, and the development of an Ocean Surface Parameter Remote Sensing System for aircraft with a potential for satellite operation. The latter system consists of an S-band radiometer, an L-band radiometer, a laser profilometer, a foam detector, and an infrared radiometer to measure temperature, salinity, winds, and wave conditions. In the in situ water measurements area, early results of water currents are shown that were determined from tracking a drifting buoy that can be tracked from shore, by aircraft, or from a satellite such as the French EOLE Satellite.