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Operations Analysis of a Multistatic Echo-Ranging System

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Final rept. 1 Jun 1971-31 Dec 1972

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Operations analysis of a multistatic echo-ranging system consisting of the SQS-26 and remote sonobuoys demonstrates outstanding performance for scenarios of convoy screening and target prosecution in the North Atlantic and Mediterranean. The remote sonobuoy consists of a 6-element vertical line array specially designed to reduce reverberation effects. The receiver was designed using a unique bistatic acoustic computer program and did perform successfully at sea. The scenarios assume a CZ contact, and analysis utilizing an operations analysis computer model developed for this project shows that three buoys are sufficient for convoy screening and eight buoys in the Atlantic and four in the Mediterranean are sufficient for target prosecution. These buoy plants result in detection probabilities in excess of 90 and in more than half the cases, localization is possible. Highly effective ships doctrine for convoy screening is to run a course a 45 deg with respect to the target datum. For target prosecution, it is best to follow a zig-zag course for environments with narrow CZs and to head directly towards the datum for environments with wide CZs. When a layer is present the receivers are planted at 60 ft and when no layer is present 1500 ft receivers are deployed. The system was found to have tactical advantages and to be four times more cost-effective than a CASS system with equivalent detection performance.

Subject Categories:

  • Undersea and Antisubmarine Warfare
  • Acoustic Detection and Detectors

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