Australia's 2026 Defence Exports Catalogue includes a cluster of companies that doesn't get much attention in US defense tech coverage — uncrewed surface and underwater vehicles that are already in operational service with multiple navies. Read alongside the capital architecture story we covered last week, it's where the allied industrial base thesis becomes concrete.
What's already in service
Ocius Technology's Bluebottle uncrewed surface vessel is in operational service with the Royal Australian Navy, the Royal New Zealand Navy, and the US Navy. It runs persistent maritime domain awareness missions, anti-submarine warfare, border security, for months at a time on a single deployment, powered by solar, wind, and wave. The vehicle carries acoustic, radar, and visual sensor payloads across the same hull.
C2 Robotics' Speartooth is a Large Uncrewed Underwater Vehicle designed for long-range, long-duration undersea operations. Its explicit design focus is manufacturing scalability. The company has optimized for high-volume production rather than bespoke platforms.
Blue Ocean Monitoring's LOCUS autonomous underwater vehicle is a low-cost AUV glider with months of endurance and roughly 1,000 kilometers of range. The company is scaling to production of hundreds of units and has already integrated AI-supported detection and classification onto the vehicle. Propulsion is buoyancy-based, which keeps the platform near-silent, a requirement for anti-submarine work.
There are more. Acacia Systems' Onyx fuses sensor data across multiple undersea platforms for full-state targeting solutions. Greenroom Robotics' GAMA converts crewed vessels into hybrid or fully autonomous craft. Advanced Navigation supplies inertial navigation systems for GNSS-denied undersea operations. TKMS Sonartech Atlas builds sonobuoy processing systems that run on these platforms.
None of this is demonstration-phase. These are platforms in the water, running missions, with multi-country customer bases.
Why undersea is different
Undersea autonomy is one of the few categories in defense where the uncrewed economic case is unambiguous. Conventional undersea surveillance is expensive and slow. A crewed submarine or surface vessel on an ASW patrol is running six- or seven-figure daily operating costs against a single sensor footprint. A persistent USV or AUV with comparable acoustic performance runs for weeks or months on solar or buoyancy propulsion at a fraction of the cost, and it can be deployed in fleets that cover orders of magnitude more ocean.
This changes what navies can afford to watch. Where crewed platforms have to prioritize high-value targets and known threat corridors, distributed uncrewed systems make wide-area persistent surveillance economically possible. That's a structural shift in the operating concept, not an incremental capability upgrade.
The category also sits in a useful spot for export. USVs and AUVs are dual-use by default, covering hydrographic survey, oceanographic research, environmental monitoring, and offshore energy inspection, which means companies can build manufacturing scale against civil demand and pivot volumes to defense as allied procurement accelerates.
The AUKUS alignment
Australia's undersea autonomy sector is positioned to plug directly into AUKUS. The AUKUS Submarine Industry Strategy, released in March 2025, is actively integrating Australian suppliers into UK and US submarine supply chains. The Australian Submarine Agency, established in July 2023 to deliver Australia's conventionally-armed nuclear-powered submarine capability, has five explicit lines of effort, including growing the Australian submarine industrial base and qualifying local suppliers through the Defence Industry Vendor Qualification and Australian Submarine Supplier Qualification programs.
Uncrewed systems are a natural complement to the nuclear-powered submarine force. They extend the sensor footprint of crewed platforms, provide persistent coverage in areas too expensive to monitor continuously, and create a layered undersea capability that's harder to defeat than any single platform. Allied navies are buying both.
Ocius is already operating with the US Navy. The others in the catalogue are at varying stages of the same path.
Investment implications
Three things are worth flagging for capital deploying into the category.
Offtake risk, the issue the Stanford piece framed as the second valley of death, is lower for undersea autonomy companies with existing multi-navy deployments than for almost any other defense tech category. When three allied navies are already running your platform, the question of whether you can convert production into durable revenue is substantially answered.
Dual-use economics make the scaling problem more solvable. The civil undersea market in offshore energy, hydrographic survey, and environmental monitoring provides a demand base that supports manufacturing capacity ahead of defense procurement cycles. Few other defense categories have that.
The cross-border opportunity is real. Australian undersea autonomy companies are already plugging into US and UK supply chains through AUKUS, and the capital architecture we covered last week, namely ADSSO, the Defence Export Facility, and the emerging DSRB, is being built specifically to accelerate that integration.
Undersea autonomy is quiet by design. It's also where the allied industrial base has the most to show right now.
