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AN/SQS-31

Country of Origin: USA

The AN/SQS-31 is a modification of the AN/SQS-4 Mod 3 long-range, active/passive search and attack sonar (see separate database entry). The set, intended for surface anti-submarine ships, has been updated.

The AN/SQS-31 is provided with rotating directional rransmission (RDT) that uses the transducer to emit a series of intense beams to increase the sonar's range. The sonar also uses the acoustic short-pulse echo classification technique (ASPECT) that sends several very short...

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