Undersea Defence Technology (UDT) 2026: Day Two Highlights
Undersea Defence Technology 2026 continues in London, with day two reinforcing how quickly operational priorities are shifting across maritime and undersea defence. Visiongain is reporting from the event, with this initial coverage highlighting key themes emerging so far.
Visiongain Top Takeaways
More undersea and maritime coverage here: Market Watch: UDT 2026 Special Edition.
Speed, Scale and Operational Effect
The conference theme, โadvantage through undersea technologyโ, has been consistently reflected in discussions across day two. A clear pattern has emerged, defined by a small number of core themes.
Speed is the most immediate of these. Across presentations, companies and themes, the focus on accelerating development and delivery has been consistent.
As Nigel Whybrow, Future Submarines and Technology Director at Babcock International Group, noted in his conference committee chairโs welcome, โUndersea programmes can be of extremely long duration and great expenseโ.
He added that โdemand for greater numbers may have two consequences – attention on increasing and accelerating production, shipbuilding in particular and the introduction of new technology and ways of operating within enabling operating hybrid force mixes.โ
Sir Stephen Lovegrove reinforced this point, indicating that operational effect is becoming a more meaningful measure than fleet size alone. This places greater emphasis on how quickly capability can be delivered and deployed, rather than how much is planned or procured.
Autonomy Moves From Concept to Capability
Autonomy is emerging as a second core theme, moving from development into operational deployment, with multiple systems on display.
One example is the EUROATLAS GREYSHARK, first introduced at UDT 2025 and showcased again this year following successful propulsion testing. GREYSHARK is a fully autonomous underwater vehicle designed for long-endurance, multi-mission operations in complex maritime environments, offering extended range, high speed and advanced sensor capability for sustained operations.
Designed for applications including long-distance pipeline protection, port security and covert reconnaissance, both the Bravo (battery-powered) and Foxtrot (hydrogen fuel cell-powered) variants offer Level 5 autonomy and endurance of up to 16 weeks. The system has been developed by EUROATLAS GmbH, EvoLogics GmbH and Fassmer.
Systems such as GREYSHARK reflect a broader shift towards persistent, autonomous operations, reducing reliance on crewed platforms for long-duration missions.
Rapid Integration and Upgrade Cycles
Alongside autonomy, rapid integration and upgrade of fielded systems has emerged as a key enabler of capability, linking faster delivery with longer system lifecycles.
Rohde & Schwarz demonstrated an end-to-end system architecture โfrom wave-generation to AI-driven data orchestrationโ, highlighting how the technology can be adapted across a wide range of platforms, from legacy diesel-electric submarines to next-generation air-independent propulsion vessels.
โRohde & Schwarz has designed the architecture to be fully modular and software-defined. In the future, new waveforms, encryption standards, or analytics algorithms can be introduced via over-the-air updates, preserving investment while keeping the fleet ahead of the curve. This scalability also enables rapid integration of emerging technologies such as quantum-secure links and next-generation low-frequency acoustic modems.โ
This approach reflects a broader shift towards maintaining operational advantage through continuous upgrade, reducing the need for full platform replacement cycles.
Operational Urgency Shaped by Live Conflict
While the war in Ukraine has driven many of these developments, the Iran conflict is providing a more immediate test case, reinforcing the need to accelerate the fielding of undersea capabilities.
Recent events have demonstrated the need for undersea capabilities even in scenarios involving non-peer adversaries. Restrictions in the Strait of Hormuz have highlighted both the strategic importance of maritime access and the operational requirement to function effectively undersea in contested and challenging environments.
This includes mine clearance, infrastructure protection, ISR and patrol operations in demanding environments.
As of the morning of 15 April, Iran appears to have paused ship traffic through the Strait, delaying direct confrontation as negotiations may resume. However, the situation is expected to require demining operations in the coming months, placing current mine countermeasure and AUV capabilities under significant pressure.
This is expected to test both the readiness and scalability of current mine countermeasure and autonomous systems.
AUKUS Progress and Supply Chain Momentum
Alongside operational developments, AUKUS has emerged as a central theme at UDT 2026, with clearer progress and direction.
Sir Stephen Lovegrove used the event to address recent speculation around the programme, stating: โThere was considerable and public speculation about the future direction of AUKUS last year, and I want to be clear now that has been unequivocally put to bed.โ
He added: โI believe that we now – with renewed political direction – have a moment of real opportunity to reanimate and refocus the partnership and ensure we are all set up to secure the benefits that it promises.โ
The trilateral agreement has faced sustained scrutiny over delivery timelines, particularly around US submarine supply, alongside broader political uncertainty following changes in government across Australia, the United Kingdom and the United States. These factors, combined with broader pressure on NATO and its partners, have contributed to a period of heightened uncertainty.
At UDT 2026, the message was clear: progress is continuing, and the focus is shifting back to delivery.
This is reinforced by recent developments in Australia, including the expansion of programmes designed to integrate domestic industry into AUKUS supply chains:
โThe development and extension of two significant programs to help local industry tap into the supply chains of our AUKUS partners:
The Australian Submarine Supplier Qualification program (AUSSQ) has been expanded, linking businesses in Australia to the United Kingdomโs submarine supply chains for the first time as well as building on the success of the pilot in growing access to supply chains in the United States.
ASC and BAE Systems have launched a new supply chain qualification program, giving Australian industry the opportunity to contribute to the SSN-AUKUS build program across both Australia and the UK.โ
Further investment has also been confirmed:
โLess than a year after the launch of Australian Submarine Supplier Qualification Program (AUSSQ), the Albanese Government is investing an additional $21 million to significantly expand this program.
$6.9 million will go towards supporting Australian suppliers to provide priority sustainment services to the UK submarines participating in the Submarine Rotational Force โ West activities at HMAS Stirling, in Western Australia.
This work will validate and qualify Australian businesses against 20 service types identified by Babcock International Group as being in high demand across the Astute class submarine supply chain, and give local industry a direct link to UK sustainment requirements.
A further $14 million is also being invested to expand the existing AUSSQ program which is qualifying Australian companies to join the Huntington Ingalls Industries (HII) Newport News Shipbuilding supply chain in the US. This next tranche will see businesses with expertise in composites, glass-reinforced plastics, furniture and joinery, able to compete for opportunities in US nuclear-powered submarine and aircraft carrier supply chains.โ
Technology, Delivery and Operational Impact
Discussions across UDT 2026 have also reinforced the role of undersea technologies in enhancing the effectiveness of future submarine fleets.
Advances in areas such as additive manufacturing and unmanned systems are expected to enhance both capability and delivery, particularly when integrated into manned-unmanned operating models.
These developments align with broader themes seen across the event, including speed of delivery, rapid upgrade cycles and the increasing importance of operational effect over platform scale.
Market implications: Visiongain Insights
The themes emerging at UDT 2026 point to a shift from platform-led thinking to capability-led delivery. Speed of development, integration and deployment is becoming as important as system performance.
Autonomy and continuous upgrade models are moving into the mainstream, reducing reliance on traditional procurement cycles and increasing demand for modular, software-defined systems.
AUKUS highlights the scale of the industrial challenge ahead. Delivery will depend not only on platform build programmes, but on supply chain integration, partner alignment and sustained production capacity.
โAUKUS being on track is one of the most significant political and maritime security news items of the year, with the agreement cementing the trilateral defence partnership beyond the significance of submarine capability. The long and valuable value chain involved will sigh a collective sigh of relief, as will many in Government across the three participating nations. The longer-term picture, which shipbuilding must always be seen in the context of, will be dominated by AUKUS progress. The technologies and delivery platforms we have seen at UDT will certainly enhance these capabilities very significantly, along with truly fostering and investing in rapid deployment of cutting-edge technologies in the critical naval domain.โ – Anthony Endresen, Visiongain ADS Editor
Further coverage and analysis
Visiongain will continue to report from UDT 2026 as the event progresses, with further updates, interviews and full-day highlights to follow.
Follow Visiongainโs ongoing undersea and maritime coverage: Market Watch: UDT 2026 Special Edition
From Visiongain
Visiongainโs latest Undersea Defence Infrastructure & Security Market Report 2026โ2036 examines how rising threats to subsea assets, increasing naval activity and advances in sensing, surveillance and protection systems are reshaping the undersea battlespace.
The global undersea defence infrastructure & security market is expected to grow from US$29.47bn in 2026 to US$56.75bn by 2036, at a 6.8% CAGR.
To understand where long-term demand is emerging and how governments and suppliers are positioning to secure critical infrastructure, request sample pages.
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