Jesus' Coming Back

US revives Cold War submarine spy program to counter China

On a windswept island 50 miles north of Seattle sits a US Navy monitoring station. For years, it was kept busy tracking whale movements and measuring rising sea temperatures. Last October, the Navy gave the unit a new name that better reflects its current mission: Theater Undersea Surveillance Command.

The renaming of the spy station at the Whidbey Island naval base is a nod to a much larger US military project, according to three people with direct knowledge of the plans: conducting the biggest reconstruction of America’s anti-submarine spy program since the end of the Cold War.

The revival of the multibillion-dollar effort, known as the Integrated Undersea Surveillance System (IUSS), comes as China has ramped up military exercises around Taiwan, heightening concerns about a potential conflict over the democratically ruled territory, which Beijing wants brought under its control.

The IUSS revamp project has not previously been reported. It involves modernizing America’s existing network of underwater acoustic spy cables and retrofitting a fleet of surveillance ships with cutting-edge sensors and subsea microphones, moves aimed at boosting the military’s ability to spy on its foes. The United States has agreed to sell Australia similar technology to help bolster allied defenses in the Pacific region.

The most innovative change in the Navy’s ocean reconnaissance system is an investment in new technologies to miniaturize and globalize traditional maritime surveillance tools. The original network of fixed spy cables, which lie in secret locations on the ocean floor, was designed to spy on Soviet submarines seven decades ago, the three people said.

 The guided-missile submarine USS Florida (SSGN 728) transits the Suez Canal in Egypt, en route the Middle East in support of the Bahrain-based U.S. Fifth Fleet, in this photo taken on April 7, 2023 and released by U.S.Navy Central Command on April 8, 2023. (credit: Elliot Schaudt/US Navy Central Command/Handout via REUTERS/File Photo)
The guided-missile submarine USS Florida (SSGN 728) transits the Suez Canal in Egypt, en route the Middle East in support of the Bahrain-based U.S. Fifth Fleet, in this photo taken on April 7, 2023 and released by U.S.Navy Central Command on April 8, 2023. (credit: Elliot Schaudt/US Navy Central Command/Handout via REUTERS/File Photo)

The Navy’s plan includes deploying a fleet of unmanned sea drones to listen for enemy craft; placing portable “underwater satellite” sensors on the seafloor to scan for submarines; using satellites to locate ships by tracking their radio frequencies; and utilizing artificial intelligence software to analyze maritime spy data in a fraction of the time human analysts would usually take.

The existence of the IUSS was only made public in 1991 at the end of the Cold War, and the details of its operations remain top secret, the three people said. The three spoke about the classified program on condition of anonymity.

Reuters was able to piece together details of the unit’s plans through interviews with more than a dozen people involved in the effort, including two current Navy staffers working on maritime surveillance, advisors to the Navy and defense contractors involved in the projects.

The news agency also reviewed hundreds of Navy contracts. That examination identified at least 30 deals linked to the surveillance program signed over the last three years with defense giants as well as a string of startups working on unmanned sea drones and AI processing. A Reuters review of ship-tracking data and satellite imagery also revealed new details about the Navy’s secretive underwater cable laying.

The IUSS is led by Captain Stephany Moore, a veteran Navy intelligence officer. The program operates under the command of Submarine Force US Pacific Fleet, headed by Rear Admiral Richard Seif.

Moore and Seif declined interview requests. In response to questions from Reuters, a spokesperson for Submarine Force US Pacific Fleet said the Navy could not discuss specifics related to its undersea surveillance system for “operational security reasons.”

“The systems have and will experience growth and recapitalization as subsea technologies are developed and as defense priorities are updated,” the spokesperson said in a statement.

Tim Hawkins, a spokesperson for the US 5th Fleet, which is based in the Middle East and has led US sea drone trials, told Reuters the Navy is improving surveillance from “space to seabed” with the aim of painting the clearest-ever picture of global activity at sea.

China, meanwhile, is working on its own maritime spy program, known as the Great Underwater Wall, two US Navy sources told Reuters.

That system, already under construction, consists of cables fitted with sonar listening sensors laid along the seafloor in the South China Sea, a tense arena due to territorial disputes between Beijing and its neighbors. China is also building a fleet of underwater and surface sea drones to scour for enemy submarines, the two people said.

The Chinese push extends far into the Pacific. The state-run China Academy of Sciences said in 2018 it was operating two underwater sensors: one in Challenger Deep in the Mariana Trench, the deepest known point on earth; the other near Yap, an island in the Federated States of Micronesia. Though China says these sensors are used for scientific purposes, they could detect submarine movements near the US naval base on Guam, a Pacific island territory, the Navy sources said.

China’s Ministry of Defense did not respond to requests for comment about any aspect of this story. China’s Foreign Ministry declined to comment.

The US Navy’s surveillance push is driven by three main factors, according to the three people with direct knowledge of the plans. First is the meteoric rise of China as a sea power and the potential for its vessels to attack Taiwan or sabotage critical undersea infrastructure, including oil pipelines and fiber-optic internet cables.

Second is Ukraine’s success in employing new maritime warfare tactics in its counteroffensive against invading Russian forces; Ukraine has used relatively cheap unmanned sea vehicles to strike enemy ships and bridges. This development has exposed the vulnerability of large surface vessels to drone attacks, and the need for the US Navy to master this technology for its own offensive operations, as well as learn ways to defend against it. That, in turn, could heighten the importance of submarine warfare in any conflict with China, the three people said.

Finally, rapid technological change, including more sensitive underwater sensors, artificial intelligence and sea drones, is fueling a surveillance arms race between Beijing and Washington.

US upgrades are long overdue and moving too slowly because the Pentagon remains focused on building huge warships and submarines, Brent Sadler, a former US Navy submarine officer, told Reuters.

“We have to invest faster in next-generation capabilities. We’re losing the lead, and the Chinese are rapidly catching up,” said Sadler, now a naval warfare fellow at The Heritage Foundation, a Washington-based think tank.

The US Navy and Department of Defense did not respond to requests for comment about the pace at which the Navy is adopting new technologies.

Sense of urgency

America’s underwater espionage program was launched in the 1950s with a submarine detection system known as the Sound Surveillance System. That consisted of so-called hydrophone cables – a type of subsea microphone – laid on the seabed. The name changed to the IUSS in 1985. That’s when the fixed cables were supplemented with technology known as the Surveillance Towed Array Sensor System (SURTASS), long vertical sonar arrays dragged below Navy ships to listen for enemy submarines lingering in the depths.

At its peak in the 1980s, the IUSS comprised thousands of Navy sailors and analyzed data from ships and undersea cables at 31 different processing facilities. Tracking Soviet vessels was central to the original mission, according to declassified Navy documents.

With the breakup of the Soviet Union in the 1990s, the IUSS was scaled back. Increasingly its analysts were tasked with monitoring marine life and offshore earthquakes.

Today, just two surveillance sites remain: the facility located within the Naval Air Station Whidbey Island in Washington State, and another at the Dam Neck naval station in Virginia Beach, Virginia.

Once dubbed Naval Ocean Processing Facilities, they were rechristened Theater Undersea Surveillance Commands last year. The new name is “more fitting of the expansive coverage of our mission,” Jon Nelson, commanding officer at the Whidbey Island unit, said at a name-changing ceremony in October 2022.

China’s rise as a naval rival, and Ukraine’s effective harassment of Russia’s Black Sea fleet with drones, have renewed the US military’s focus on ocean surveillance in a fast-changing maritime environment, according to Phillip Sawyer, a retired US Navy vice admiral and former head of the submarine forces in the Pacific.

“It has given us a sense of urgency that perhaps was lacking in the ’90s and the early 2000s,” said Sawyer, now the Undersea Warfare Chair at the Naval Postgraduate School in Monterey, California.

Adding to that urgency: the need to protect subsea internet cables crisscrossing the ocean floor, a global network that carries 99% of transcontinental internet traffic. These cables are the heart of an intensifying competition between the United States and China to control advanced technologies, Reuters reported in March.

In February, two undersea internet cables were cut that connected Taiwan with the Matsu Islands, a cluster of isles governed by Taiwan that sit close to the Chinese mainland. It took weeks to restore internet service fully to some 14,000 island residents. Taiwanese authorities said at the time they suspected two Chinese vessels were to blame, but provided no direct evidence and stopped short of calling it a deliberate act.

China did not comment on the incident at the time. China’s defense and foreign ministries did not respond to fresh requests for comment about it.

In May, the Quad – an alliance between Australia, Japan, India and the United States – said the four countries would partner to protect and build undersea high-speed fiber-optic cables in the Indo-Pacific.

Both the Chinese and US navies regularly carry out military exercises around American ally Taiwan as military analysts study how any potential conflict over the island could play out.

 Chinese Navy's nuclear-powered submarine Long March 11 takes part in a naval parade off the eastern port city of Qingdao, to mark the 70th anniversary of the founding of Chinese People's Liberation Army Navy, China, April 23, 2019. (credit: REUTERS/JASON LEE/FILE PHOTO)
Chinese Navy’s nuclear-powered submarine Long March 11 takes part in a naval parade off the eastern port city of Qingdao, to mark the 70th anniversary of the founding of Chinese People’s Liberation Army Navy, China, April 23, 2019. (credit: REUTERS/JASON LEE/FILE PHOTO)

Although US warships and submarines are widely considered technically superior, China has the largest navy in the world, comprising around 340 ships and submarines, according to the Pentagon’s 2022 report on China’s military. China is building more advanced nuclear-powered submarines that are quieter and harder to detect, the report said.

Ships going dark

The jewel of the US subsea surveillance operations remains the global network of listening cables first laid during the Cold War, still the best subsea spying infrastructure in the world, according to two Navy sources with direct knowledge of the system.

Those cables were instrumental in solving the mystery surrounding the privately-owned Titan submersible that imploded in June, killing five people on a voyage to view the century-old wreckage of the Titanic, the sources said.

The US Navy said in a statement that it had assisted in the search for the Titan after an analysis of acoustic data detected “an anomaly consistent with an implosion.” The Navy did not respond to questions from Reuters about how it had obtained the acoustic data.

Over the last three years, some of this cable network has been expanded and replaced with advanced cables fitted with state-of-the-art hydrophones and sensors to more accurately pinpoint the location of enemy vessels, the two people said.

Much of this work has been carried out by the 40-year-old USNS Zeus, the first and only operational cable ship specifically built for the US Navy, the people said. Assisting are the CS Dependable and CS Decisive, two cable ships owned by the private US firm SubCom, they said. SubCom has become a key player in the tech war with China, Reuters reported in July.

To keep the locations of US underwater spy cables secret, these three ships have been masking their locations, known in the shipping industry as “going dark,” according to the two Navy sources and a Reuters analysis of ship tracking data.

Commercial ships are required under international law to keep their identification transponders switched on to prevent collisions and help authorities fight maritime crimes. But nations can secure exemptions for some private vessels, particularly those working on national security projects, according to London-based maritime lawyer Stephen Askins.

Between Jan. 1, 2022, and August 22 of this year, the CS Dependable and the CS Decisive were not transmitting identification signals for 60% and 57% of the days they spent at sea, respectively, according to data on LSEG’s Eikon terminal.

SubCom and the US Department of Defense did not respond to requests for comment about any exemption for SubCom vessels.

The second element of the original US subsea spy program is a fleet of five large catamaran-style ships equipped with the SURTASS system, the cables fitted with sonar listening gear and dragged through the ocean.

In February 2020, the Navy awarded Lockheed Martin a $287 million contract to produce new advanced towed sonar arrays for these ships. The first of these new cables was delivered last year, according to two Navy sources.

Lockheed Martin did not respond to a request for comment.

Now the Navy is building new miniaturized, mobile versions that can be deployed undetected, the sources said. These modules, known as Expeditionary SURTASS, or SURTASS-E, can be placed in cargo containers loaded onto any flat-decked vessel, allowing commercial ships to carry out surveillance for the Navy, two sources with knowledge of the project said.

Over the last three years, the Navy has been testing the system from an offshore supply vessel in the Atlantic, and it has since been used in active operations in secret locations, the sources said.

In May, the US State Department said in a statement that it had approved the sale of a $207 million SURTASS-E system to the government of Australia.

An Australian Defense spokesperson told Reuters it was investing in new undersea surveillance capabilities to protect critical infrastructure and monitor evolving subsea threats.

Japan also operates a fleet of three ocean surveillance ships, fitted with US SURTASS cables, the two US Navy sources said.

Japan’s navy, known as the Maritime Self-Defense Force, said in a statement that it was coordinating with its allies to counter China’s increased naval threat; it declined to comment specifically on surveillance operations.

Sea drones with sharp ears

The Navy is experimenting with new ways to listen for subs in areas where its warships are closely monitored by China, including the Taiwan Strait and South China Sea, two sources with knowledge of those efforts said.

This means using stealthier methods such as sending out small, unmanned sea drones fitted with infrared cameras and underwater microphones, and dropping portable listening devices from commercial ships, the people said.

One of the first successful attempts to make an autonomous subsea surveillance unit was the Transformational Reliable Acoustic Path System (TRAPS), developed by Leidos, a Virginia-based Fortune 500 defense firm, the people said. The Navy awarded Leidos a $73 million contract to develop the system in 2019.

TRAPS consists of a processing box attached to deep ocean sensors. It is designed to sit on the seafloor and listen for submarines overhead, like an underwater satellite.

These underwater spy units could be surreptitiously dropped off the side of a fishing vessel or tugboat in enemy territory, Chuck Fralick, Leidos’ chief technology officer and a retired Navy officer, told Reuters.

“You can get listening or surveillance capability pretty much anywhere in the world you want,” Fralick said.

The Navy has also been experimenting with small sea drones, including uncrewed sailboats and autonomous miniature submarines that cost $800,000 to $3 million to build – relatively small change in the world of defense systems.

These craft don’t yet carry weapons. But they can be fitted with high-definition cameras, underwater microphones, satellite uplinks and other spy gear, giving the Navy a low-cost means to expand its surveillance dramatically, Navy spokesman Hawkins said.

In the future, these vessels could be used to fire submarine-sinking torpedoes, drop underwater mines or set off decoy devices that make loud noises beneath the surface to confuse the enemy, two Navy sources said.

The Navy did not respond to questions about arming sea drones.

Saildrone, a San Francisco-based firm founded in 2012 by British engineer Richard Jenkins, for years has been collecting data from its unmanned sailboats to track marine life movements and measure impacts of climate change.

Now military customers are calling. In the past two years, Saildrone says it has supplied the US Navy with 22 of its solar-powered boats, including the 33-foot Voyager, which can be equipped with a smart camera and a variety of sensors. The Navy confirmed that it has purchased Saildrones.

Though the Navy has yet to place large orders, Saildrone and other drone startups say they are each ready to supply hundreds of vessels a year.

Navy spokesperson Hawkins declined to say how many more uncrewed vessels the military might procure. But he said the sea drone industry was “on the cusp of a technological revolution.”

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