Abstract
Operator detection-and-localization (DAL) performance was compared for non-refreshed B-scan and PPI sonar displays under multiple successive transmission conditions. Subjects were tested in the Raytheon Sonar Control Room Simulation Facility under low red ambient illumination. Simulated sonar targets masked in flat Gaussian noise were presented at various ranges, bearings, and signal-to-noise ratios. Subjects were required to detect and localize the targets and to rate their confidence in the DAL. Performance using the B-scan was consistently 2 to 3 dB better than performance with the PPI. Detectability for both displays increased by about 3 dB from the first to the sixth “ping”.
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