Abstract
A towed four-frequency acoustic backscattering system has been used to detect a variety of fluid processes in the ocean. A short review of experimental results obtained during the past three years will be presented. Examples of acoustic records which show detected short period internal waves, mixed processes, the seasonal variability of the particulate distribution and dispersion of man-introduced particles in the ocean, and interleaving water masses will be presented. Internal wave spectra calculated from the acoustic records will be discussed. Acoustic data showing the interrelationship of predator and prey, and active biological avoidance of research instrumentation will also be presented. [Work supported by NORDA, NOAA and NSF.]
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