The side-scanning sonar, precision bathymetry, and acoustic transponder navigation capabilities of the Marine Physical Laboratory deep-tow device were used to produce a bathymetric chart, a pictographic map of side-scanning sonar data, and a photographic mosaic of the side-scanning sonar records corrected for lateral distortion for a 5 × 6-km section of the La Jolla deep-sea fan. The precise navigation provided by the acoustic transponder system made possible a detailed description of the meanders of the La Jolla Fan-Valley and recognition of subtle depressions and lineaments on the open fan.

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