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The Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) technology provides detection, localization, classification and geographic positioning of a wide range of underwater sound sources over instantaneous wide areas spanning continental-shelf scale regions. These sound sources include ocean biology, geophysical processes, as well as man-made vehicles and activities. Here we present the POAWRS approach for sensing marine mammals, monitoring ships and other ocean vehicles, offshore seismic exploration, as well as piling activities. We discuss signal source level estimation and POAWRS detection region modelling for random range-dependent ocean waveguides, incorporating calibrated statistical and acoustic propagation models for the saturated and partially saturated broadband time-averaged ocean acoustic transmission scintillation. Results are presented from experiments in the Gulf of Maine and the Norwegian Sea. Temporo-spatial distributions of marine mammal vocalizations from diverse species over areas spanning 10,000 square kilometers obtained from POAWRS are overlain on fish distributions obtained from active ocean acoustic waveguide sensing and ultrasounic echosounding to elucidate the predator-prey interaction and behavior.
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