AN/SQS-26 Sonar From the Federation of American Scientists Military Analysis Site:
"The long range AN/SQS-26 sonar, istalled on FF-1052 and FFG-1 class ships, is designed to use direct, bottom reflected and convergence zone acoustic propagation paths where they occur in the oceans to achieve maximum effectiveness. Active modes include bottom bounce, bottom bounce track, bottom bounce triple frequency, convergence zone, omni-directional. Passive modes include audio via headphone, video via plan position indicator (PPI), B-scope, A-scan recorder, graphic indicator, sector scan indicator, azimuth recorder, and numerous dial indicators."
