U.S. Navy Secures Future of Critical Towed Array Sonar Systems for Submarine Warfare

The U.S. Navy has committed up to $42.7 million to ensure the continued operation and advancement of its vital towed array sonar systems, including their sophisticated internal electronics, over the next five years. This significant investment underscores the Navy’s dedication to maintaining its advantage in undersea warfare.

The Department of Defense awarded the contract to the Chesapeake Sciences Division of L3 Technologies, a Maryland-based firm that has been a long-standing producer of towed array sonar systems for the U.S. Navy for over a decade. Towed arrays are extended cables equipped with numerous underwater microphones, known as hydrophones. Submarines deploy these arrays at a safe distance astern to clandestinely listen for the faint acoustic signatures of adversary vessels.

Deploying these sensor arrays far from the submarine itself is paramount. This separation prevents the submarine’s own operational noise – stemming from its machinery, propulsion system, and hull acoustics – from overwhelming the highly sensitive listening equipment. By extending the sensor line via a cable, which can stretch for hundreds of feet, the towed array can detect sounds that the submarine’s onboard sensors would be unable to differentiate from the vessel’s self-generated noise.

The new contract specifically covers the provision of hardware and services to support the Navy’s towed array programs, utilizing what is termed “towed array integrated product team telemetry.” This technical contracting language primarily refers to the electronic systems responsible for transmitting real-time acoustic data from the towed array back to the submarine’s sonar operators.

Reliable telemetry, or data transmission, is as crucial as the sensor itself. Without a robust data link, even an impeccably tuned array capable of detecting a distant submarine would fail to convey that critical information to the sailors who need to act on it. This makes the data conduit connecting the sensor to the display an operationally vital component, no less important than the sensor technology itself.

Chesapeake Sciences will execute the work at its facility in Millersville, Maryland. The ordering period under this agreement extends until July 2031, providing the U.S. Navy with approximately five years to issue task orders for upgrades, spare parts, or engineering support as its towed array fleet requires. Management of the contract will be handled by the Naval Undersea Warfare Center, located in Rhode Island. This procurement is particularly critical given the ongoing substantial investments by nations like Russia and China in developing quieter submarine designs, engineered specifically to circumvent the very listening technologies this contract aims to sustain and enhance.

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