AN/BQQ-5

AN/BQQ-5
Public domain · source
Name	AN/BQQ-5
Type	Submarine sonar suite
Country	United States
Service	1970s–2000s
Manufacturer	Raytheon; General Dynamics Electric Boat

AN/BQQ-5 The AN/BQQ-5 is a submarine sonar combat system developed for United States Navy attack and ballistic missile submarines during the Cold War era. It integrated passive and active arrays, sonar signal processors, and tactical displays to support antisubmarine warfare, surveillance, and navigation. The suite was installed on classes including Los Angeles-class submarine, Ohio-class submarine, and Seawolf-class submarine to provide detection, classification, and fire-control support.

Design and development

Development of the AN/BQQ-5 began in response to evolving Soviet Nuclear submarine designs such as Typhoon-class submarine, Victor-class submarine, and Alpha-class submarine and incorporated advances from researchers at Naval Research Laboratory, contractors like IBM, Raytheon, and shipbuilders including Electric Boat Division of General Dynamics. Program milestones intersected with initiatives led by the Office of Naval Research, collaboration with NATO partners including Royal Navy and Marine Nationale, and academic institutions such as Massachusetts Institute of Technology and Johns Hopkins University Applied Physics Laboratory. The architecture integrated lessons from earlier systems like AN/BQR-2, AN/BQQ-2, and experimental arrays tested on the submarine USS Albacore (AGSS-569), accounting for acoustic environment studies in the North Atlantic Treaty Organization theater and the Pacific involving sea states near Aleutian Islands and Barents Sea. Requirements were influenced by strategic considerations from policymakers at the Pentagon and legislated funding cycles in the United States Congress.

Technical specifications

The system combined a bow-mounted active array, passive spherical array, and flank arrays with digital beamforming processors developed with technologies matured in projects at Bell Labs and MIT Lincoln Laboratory. Signal processing hardware used modules with components from firms such as Texas Instruments and Analog Devices; software employed algorithms rooted in research from Stanford University and California Institute of Technology on matched filtering, adaptive beamforming, and Doppler processing. Acoustic performance metrics were measured against benchmarks derived from studies by SACLANTCEN and data repositories at Woods Hole Oceanographic Institution. The electronics conformed to standards practiced by Naval Sea Systems Command and the Defense Advanced Research Projects Agency for shock, EMI, and temperature. Tactical displays interfaced with combat systems like AN/BYG-1 and fire-control equipment compatible with Mk 48 torpedo employment procedures overseen by U.S. Navy Submarine Force (COMSUBFOR).

Operational history

AN/BQQ-5-equipped submarines conducted Cold War patrols tracking Soviet task groups including Kirov-class battlecruiser sorties and ballistic missile submarine patrol patterns such as those of Delta-class submarine and Yankee-class submarine. Deployments placed assets under commands like Submarine Force Atlantic and Submarine Force Pacific supporting operations near hotspots referenced in histories of Cuban Missile Crisis aftermath planning and exercises like Operation Ocean Venture and UNITAS. Encounters used doctrine influenced by naval strategists at Royal United Services Institute and analysis from the Center for Strategic and International Studies. Upgrades and maintenance cycles aligned with refits at shipyards such as Newport News Shipbuilding and Electric Boat, and intelligence assessments informed operational tuning via liaison with agencies like National Security Agency and Central Intelligence Agency.

Variants and upgrades

Over its life the suite evolved into iterations incorporating improvements from programs involving Naval Undersea Warfare Center and contractors including General Dynamics and Raytheon; enhancements paralleled technologies demonstrated in projects like Surveillance Towed Array Sensor System and research from Scripps Institution of Oceanography. Firmware and hardware refreshes integrated digital signal processing advances similar to those used in Aegis Combat System upgrades and enabled interoperability with NATO sonar data links defined by NATO standards. Incremental improvements addressed countermeasures associated with quieting advances on Soviet submarines by examining acoustic treatment research from Boeing laboratories and materials science findings at Oak Ridge National Laboratory. Lifecycle modernization dovetailed with broader submarine hardware programs such as SUBSAFE and combat system overhauls conducted during depot periods.

Deployment and platforms

The AN/BQQ-5 was deployed on US submarine classes that included Thresher/Permit-class submarine follow-ons like Los Angeles-class submarine, fleet ballistic missile platforms including Ohio-class submarine, and special mission platforms akin to Seawolf-class submarine installations. Refits occurred at Portsmouth Naval Shipyard, Mare Island Naval Shipyard, and Puget Sound Naval Shipyard during Overhauls and Refuelings. Internationally, sonar development experience fed allied programs in navies such as the Royal Australian Navy, Canadian Forces Maritime Command, and Japanese Maritime Self-Defense Force, influencing sonar architectures in designs by firms like ThyssenKrupp Marine Systems and DCNS.

Category:Sonar