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Underwater passive acoustic directional sensors and Seaweb through-water networked acoustic communications are implemented in the Intracoastal Waterway at Morehead City, North Carolina on the U.S. eastern seaboard. The objective is to demonstrate capability for first-alert protection of a high-value port facility against asymmetric threats that intelligence sources indicate are arriving via watercraft...
Sea-floor acoustic scattering strength measurements are useful for understanding the observed reverberation in active sonar systems and for estimating sea-floor bottom properties. Observed reverberation and resulting measured scattering strength frequently show a high degree of spatial and temporal variability. This variability may be observed on short, sample-to-sample, times scales from a single...
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