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 DOT&E Director, Operational Test & Evaluation  
FY98 Annual Report
FY98 Annual Report


Navy ACAT IC Program: Prime Contractor
Total Number of Systems:94Lockheed Martin
Total Program Cost (TY$):$7216.8M 
Average Unit Cost (TY$):$41.24MService Certified Y2K Compliant
Full-rate production:3QFY94No


The AN/SQQ-89 (V) is an integrated ASW combat system combining improved sensors and weapon control systems with advanced acoustic data processing and display. The system integrates the AN/SQS-53B/C/D hull mounted sonar, the AN/SQR-19 (V) Tactical Towed Array Sonar and the AN/SQQ-28 (V) LAMPS MK III Shipboard Electronics with the ASW Control System (ASWCS) MK 116 MOD 5/6/7/8/9 and supports the Joint Vision 2010 concepts of full-dimensional protection and precision engagement by providing long-range detection, tracking, localization and correlation of surface and subsurface contacts and engagement of subsurface contacts via the ship's Combat Direction System or Command and Decision subsystem. Various combinations of the AN/SQS-53B/C/D, the AN/SQR-19 (V), the AN/SQQ-28 (V) and the MK 116 constitute the AN/SQQ-89 variants that are installed in the CG 47, DDG 51, DD 963, and DDG 993 classes. Only combinations of the AN/SQR-19 (V) and AN/SQQ-28 (V) are included in the AN/SQQ-89 (V) variants that are installed in the FFG 7 class. The AN/SQQ89 (V) 6 is the baseline system for towed array ships and underwent OPEVAL in 1994.

The baseline AN/SQQ-89 (V) system is in the process of being improved. The program office has developed commercial-off-the shelf (COTS) engineering changes to be back-fit into in-service ships and grouped them into the following three Block Upgrades:

  • Block I: Designated the "Torpedo Alertment Upgrade", includes installation of the Torpedo Recognition and Alertment Functional Segment (TRAFS), (formerly called Multi-Sensor Torpedo Recognition and Alertment Processor (MSTRAP)), and operability improvements such as the System Level Recorder and associated Signal LAN (S-LAN), the Tactical Decision Support Subsystem (TDSS), a COTS-based Sonar In-situ Mode Assessment system (SIMAS II) and a Common Integrated Tactical Picture (CITP) capability.

  • Block II: Designated the "Shallow Water Upgrade", (most ships that receive the BLK I upgrades will later receive these improvements.) They include the Echo Tracer Classifier for improved shallow water active SONAR classification capability as well as improvements to the system's On-Board Trainer.

  • Block III: Designated the "Multistatic Upgrade," capitalizes on the SQQ-89 (V) 15 forward fit investment and integrates a Multi-Function Towed Array (MFTA) replacement for the SQR-19B (V) 1 to improve littoral water performance of the active SONAR, as well as passive submarine and torpedo detection performance. Definition of this upgrade is still in progress.


SQQ-89 integrates individual and operationally tested major components. These major components were all determined to be operationally effective and suitable. In FY90, DOT&E suggested the creation of a TEMP to operationally test the integrated SQQ-89 system with the first TEMP approved by OSD in 1991.

The most recent testing of the AN/SQQ-89 system was OT-IIIF completed in June 1994 in conjunction with platform level FOT&E of the DDG-51 class guided missile destroyer. The purpose of the evaluation was to determine the operational effectiveness and suitability of the AN/SQQ-89 (V) 6 and verify the correction of the deficiencies discovered during the 1992 test (OT-IIIE) on USS ARLEIGH BURKE (DDG-51). Testing was conducted at the Pacific Missile Range Facility, Barking Sands, HI. The test platform was USS CURTIS WILBUR (DDG-54), with services provided by surface and sub-surface craft, as well as ASW and tactical aircraft. Seven Mk 46 exercise torpedoes were launched. This test was in full compliance with the OSD-approved TEMP.

Overall, DOT&E determined that the AN/SQQ-89 (V) 6 ASW combat system installed in the DDG-51 class ship to be operationally effective and operationally suitable. Major deficiencies discovered in the 1992 test were corrected and all COIs were resolved. System software reliability exceeded revised thresholds approved by the Navy after determining that previous thresholds were unrealistic. However, survivability remains a concern. Although the SQQ-89 (V) 6, in conjunction with external ASW support forces, allowed only seven successful counterattacks by the SSN (out of 17 engagements), an erroneous conclusion might be drawn that adequate survivability is offered by the system, especially when the ship makes the tactical decision to employ active sonar. In fact, enhancements, many of which are planned, remain vital to improve the individual ship's ability to detect the enemy's submarine presence and evade attack. When faced with an attacking submarine in a one-on-one encounter, current systems do not afford a survivability advantage to the surface combatant.

A standalone introductory version of MSTRAP underwent an OPEVAL at the Pacific Missile Range Facility on July 9-10, 1997. The introductory MSTRAP system was determined to be operationally effective for DD 963 class ships with the AN/SQQ-89 (V) 6 stand-alone system while employing the AN/SQR-19 towed array, but not operationally effective otherwise. The system was found to be not operationally suitable. OPTEVFOR did not recommend fleet introduction of the standalone MSTRAP.


The current approved TEMP from June 1994 is being updated to reflect the evolving series of Block upgrades to the SQQ-89 system. A verification of corrected deficiencies on MSTRAP is planned during a previously scheduled early 1999 exercise. FOT&E is planned for the summer of 1999 to evaluate the SQQ-89 (V) 6 Block I upgrade, which will include the torpedo alertment functionality.


While the baseline SQQ-89 system is operationally effective and suitable, testing of the various upgrades is required. A significant challenge remains in the identification and allocation of resources/funds to support adequate testing of these upgrades. DOT&E is working with the PM and OPTEVFOR to identify cost effective options for system upgrade operational testing. Based on the poor performance of standalone MSTRAP, there is concern about the effectiveness of the planned torpedo alertment segment, (TRAFS), that will be embedded in the SQQ-89 system. DOT&E will ensure that adequate testing of this segment/functionality is conducted during the FY99 testing of the Block I upgrade.

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