Abstract
Results of trials of the prototype system for the deep submergence rescue vehicle obstacle-avoidance sonar are discussed. Data from the shallow area outside the San Diego Bay, including returns from a sunken ship, and data from deeper water in the La Jolla area, showing features of the terrain, are included. The system operates in a pulsed, active mode, and measures the relative phase of the outputs of two vertically displaced receivers. The arrival angle of back-scattering from the ocean bottom is thus determined. Recorded phase vs slant-range data have been converted by a CDC 3600 computer to elevation vs horizontal range. In the final system, this processing will be done in real time. [This paper represents results of research sponsored by the U. S. Navy's Office of Naval Research and the Deep Submergence Special Projects Office.]
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