BQQ-2 sonar

BQQ-2 sonar. The BQQ-2 was an integrated sonar suite developed for the United States Navy's attack submarines during the Cold War. It represented a significant technological leap in submarine warfare, combining powerful low-frequency active and passive arrays for long-range detection. The system was a cornerstone of the SUBSAFE-era fleet's acoustic superiority against Soviet Navy threats.

Overview

The BQQ-2 integrated sonar system was designed as the primary sensor for the ''Sturgeon''-class and the unique USS ''Narwhal''. Its design philosophy centered on providing a comprehensive acoustic picture, merging data from a large, bow-mounted spherical array with other sensors. This suite was a direct successor to systems like the BQS-6 and a contemporary of the larger BQQ-5 used on ''Los Angeles''-class boats. Its deployment was a critical component of missions under the Atlantic Fleet and Pacific Fleet, supporting global anti-submarine warfare patrols.

Development and deployment

Development of the BQQ-2 was led by the Naval Underwater Systems Center in Newport, with General Electric as the prime contractor. The program emerged from advanced sonar research conducted in the late 1950s and early 1960s, aiming to counter new generations of quieter Soviet Navy submarines like the ''Victor''-class. The first operational installation was on USS Sturgeon (SSN-637) upon its commissioning in 1967. Subsequent deployments equipped nearly all vessels of the ''Sturgeon'' class, forming the acoustic backbone of the Atlantic and Pacific submarine forces for decades. Key testing and evaluation often occurred at facilities like the Naval Submarine Base New London and the Atlantic Undersea Test and Evaluation Center.

Technical specifications

The core of the BQQ-2 was its large, water-filled spherical array housed in the submarine's bow, operating in both passive and active low-frequency modes. The system incorporated advanced digital signal processing for its time, a significant upgrade from prior analog systems. It was integrated with the SUBROC weapon system and later versions supported the Harpoon and Tomahawk missiles. The sonar suite also typically included a BQR-7 passive intercept array and a BQS-8 under-ice navigation sonar. Data was managed through the MK 117 Fire Control System, linking detection to engagement. The system's power requirements and physical size dictated the design parameters of the ''Sturgeon''-class hull.

Operational history

The BQQ-2 entered service at the height of the Cold War, with its submarines conducting vital surveillance and tracking missions against the Soviet Northern Fleet and Soviet Pacific Fleet. Boats equipped with this sonar were frequent participants in major exercises like Ocean Safari and Team Spirit. They played crucial roles in intelligence-gathering operations, often shadowing Soviet Navy surface action groups led by vessels like the ''Kiev''-class aircraft carriers. The system proved effective in the challenging acoustic environments of the GIUK gap and the Barents Sea. While no publicized combat engagements occurred, its persistent presence contributed to strategic deterrence throughout the Vietnam War era and into the 1980s.

Variants and upgrades

The baseline BQQ-2 underwent several iterative upgrades to improve its capabilities. The BQQ-2A introduced improved signal processing components. The BQQ-2B variant featured enhancements to support wider engagement capabilities. The most significant upgrade was the BQQ-2C, which integrated portions of the more advanced BQQ-5 sonar's technology, including better processors and displays. These evolutionary upgrades kept the Sturgeon-class submarines acoustically competitive until their retirement. The technology and experience gained from the BQQ-2 program directly informed the development of subsequent systems like the BQQ-6 and the widespread AN/BQQ-10 acoustic rapid commercial off-the-shelf insertion system.

Category:Sonar