Battle for the seabed: defence groups take aim at underwater security
Disruption to gas pipelines and telecoms cables have focused policymakers’ minds on protecting submarine assets
Defence companies, marine contractors and technology start-ups are gearing up for a looming multibillion-dollar surge in government spending in a new battlefield: the defence and attack of national maritime assets as well as critical infrastructure.
Recent disruption to seabed gas pipelines and telecoms cables have focused military planners’ minds on finding ways to protect underwater assets that are crucial to modern economies.
The US recently strengthened the defence of its underwater infrastructure with the Federal Communications Commission tightening subsea cable regulations.
Protecting the underwater domain was also one of the main messages in the UK’s latest strategic review of its military capabilities.
The “effort to maintain situational awareness underwater and track relatively elusive targets is not something navies are strangers to”, said Sid Kaushal, a naval warfare expert at the Royal United Services Institute.
But new threats, from attacks on infrastructure such as cables and pipelines to assaults on cargo ships, mean the traditional approach to underwater warfare — where a maritime patrol aircraft and a few frigates are called upon to track one hostile submarine — is becoming unsustainable and costly.
The task has been made even harder as critical national infrastructure has been targeted.
The challenge was one of “scale and how to scale [your] capabilities”, said Kaushal.
Some of the world’s best-known defence companies, including BAE Systems and Thales, as well as smaller players from Ultra Maritime to start-ups such as Helsing, are investing heavily in cutting-edge technologies for navies around the world, including in the UK, Australia and the US.
Companies are also eyeing Nato’s Digital Ocean Vision initiative, which aims to enhance the alliance’s ability to understand and assess events under, on and above the sea using everything from satellites to autonomous systems.
The challenges of operating underwater are numerous. It is an “environment of extremes”, said Dave Quick, head of underwater weapons at BAE Systems. Quick cites the “depths, the [water] pressures, the acoustic environment that all the systems are dependent upon and the unimaginable vastness of it all”.
Europe’s largest shipbuilder, Fincantieri, expects the global defence and commercial underwater market to grow €50bn a year. The Italian state-controlled company expects its underwater division to double in size over the next two years, reaching €820mn in revenue in 2027.
Executives said advances in microelectronics and autonomy, as well as the increasing adoption of artificial intelligence in civil and military spheres, were helping to drive a revolution in what is possible.
The “proliferation and the cost reduction of really sophisticated high-performance computing systems and micro electronics . . .[have] made things possible that had not been possible for decades in terms of miniaturisation, power utilisation and processing capability”, said Brett Phaneuf, chief executive of MSubs, which specialises in underwater vehicles.
The Plymouth-based company, which is owned by Phaneuf’s Submergence Group, recently developed an extra-large, uncrewed submarine for the Royal Navy.
Dubbed Excalibur, the 12m-long experimental vessel, 2.2m in diameter and displacing 19 tonnes, is the largest uncrewed underwater vessel trialled by the navy to date. It will spend the next two years carrying out sea trials to help accelerate the navy’s use of advanced technologies.
“We’ve reached a tipping point on several fronts,” said Ian McFarlane, sales director for underwater systems at Thales UK. Not only have there been advances in the miniaturisation of some of the capabilities required, such as sensors, but also in the development of the uncrewed platforms to carry them.
The result was that “you can put mass at sea with smaller sensors to hopefully do the same job”, he said.
The company, which has provided sonar systems for the Royal Navy for decades, is among several interested in the navy’s upcoming Project Cabot — to deploy a fleet of crewed and uncrewed vehicles to provide an anti-submarine warfare capability.
The navy will work with defence contractors to use underwater drones to collect acoustic data, which can then be processed using AI to detect potential threats.
McFarlane said Thales was in talks with strategic partners on Cabot. The aim, he said, was as much about handling the data that was collected through sensors and other means as well as transferring it into usable information and presenting it in such a way that people understand what they are looking at.
Ensuring you can deliver critical data securely and as close as possible in real time is critical, according to executives.
“You can’t have a bad day,” said BAE’s Quick. The systems that companies offer have to be “resilient” and to work when needed. It was also important to have the “military understanding to know when something looks wrong”.
The company, which builds all of the nuclear submarines for the Royal Navy, has developed an extra-large autonomous underwater vehicle developed specifically for military use.
Dubbed Herne, Quick said the modular vessel offered users a huge amount of flexibility, allowing them to add extra length for additional payloads, as well as “incredible range and endurance”.
The increased threat has also prompted interest from defence technology start-ups, including Europe’s Helsing as well as Anduril UK, the British subsidiary of the US group. The companies are hoping to leverage their faster development times to secure positions on important programmes.
Helsing said in July it had chosen Plymouth in Britain’s south-west as the site for a factory to build a fleet of AI-powered autonomous gliders, called SG-1 Fathom.
The company said a single operator would be able to monitor hundreds of SG-1 Fathoms, receiving intelligence at just 10 per cent of the cost of crewed anti-submarine warfare patrols.
Helsing plans to deploy the system — which it is developing in partnership with underwater drone group Blue Ocean Marine Tech Systems, maritime robotics specialist Ocean Infinity and FTSE 250 defence group Qinetiq — within the next 12 months.
US rival Anduril, meanwhile, has teamed up with British companies Sonardyne and Ultra Maritime to offer a real-time, autonomous submarine sensing system named Seabed Sentry.
Dropped from a ship or submarine, Seabed Sentry forms a network of low-cost yet sophisticated “sensor nodes” on the seabed. Coupled with Ultra’s Sea Spear, a lightweight sonar system, the system acts as a “trip wire” to warn of any suspicious underwater activity in real time.
Richard Drake, general manager of Anduril UK and the broader European region, said the company had managed to go from “concept to testing in the water” for Seabed Sentry in about a year.
“We’re all about getting something in the water . . . It’s a software approach to hardware.”