Substantial modification to the AUKUS submarine plan: Australia will acquire 3 used Virginia-class submarines and launch the first joint underwater drone project
According to Naval News, the AUKUS trio has formalized a comprehensive update that simplifies the submarine acquisition timeline and accelerates the development of uncrewed underwater capabilities under Pillar II. This decision comes amid growing pressure to provide deterrence against China’s naval power in the Western Pacific.
Quick Look
- Who: United States, United Kingdom, Australia (AUKUS)
- What: 3 used Virginia-class submarines for Australia + joint UUV payload development
- When: Joint statement on May 30, 2026, Shangri-La Dialogue
- First UUV Delivery: 2027
- UK Contribution: £150 million (approx. US$202 million)
- Base: Submarine Repair Facility-West (SRF-West), HMAS Stirling naval base (Western Australia), 2027
Background: The AUKUS Agreement and Its Two Pillars
The AUKUS partnership, established in 2021, is based on two pillars. Pillar I involves Australia’s acquisition of nuclear-powered attack submarines, while Pillar II covers joint development in advanced technologies such as artificial intelligence, hypersonic weapons, cybersecurity, and underwater drones. As reported by Breaking Defense, the May 30 statement took concrete steps on both pillars: on one hand, the interim formula for Australia’s submarines was changed, and on the other, the first “flagship project” for Pillar II was launched.
Details: Why the Submarine Formula Changed
Under the previous plan, Australia was set to receive two used Block IV submarines between 2032 and 2034, and one new Block VII submarine in 2037. In the new agreement, this mix has been changed to three in-service Virginia-class submarines. The official justification is to simplify the supply chain, maintenance and sustainment loads, and operational requirements, as well as to maximize cost-effectiveness. These submarines will serve as a bridge to the next-generation SSN-AUKUS submarines, which are expected to enter service in the 2040s.
| Component | New Status |
|---|---|
| Australian Submarines | 3 used Virginia-class submarines (instead of the previous mix) |
| First Pillar II Project | Payload and control systems for unmanned underwater vehicles, delivery in 2027 |
| Unmanned Underwater Vehicle Missions | Seabed infrastructure protection, reconnaissance, strike, anti-submarine warfare, mine countermeasures, electronic warfare |
| UK Funding | £150 million |
| SRF-West Base | At HMAS Stirling base in 2027; U.S. personnel rotation by late 2026 |
Unmanned Underwater Vehicles: The Real New Dimension
The most visionary part of the agreement is the joint development of uncrewed underwater vehicles (UUVs), the first flagship project of Pillar II. The three nations aim to have the capability to “detect, deter, and defeat” maritime threats with interchangeable payloads, including sensor systems and weapons. The protection of undersea communication and energy cables is a particularly highlighted mission. Each partner will initially focus on different payload effects, followed by a transition to trilateral integration with common standards and control systems.
What does this mean for Turkey?
The AUKUS pivot towards uncrewed underwater systems directly aligns with the naval platform ecosystem that Turkey has rapidly expanded in recent years. While Turkey is advancing the indigenous design of a non-nuclear attack submarine through its MILDEN (National Submarine) program, it has also established a significant range of capabilities in the field of uncrewed surface vehicles (USVs). The MARLIN USV, built by Aselsan-Sefine, and the SANCAR Armed Unmanned Surface Vehicle have already entered service for reconnaissance, surveillance, and naval strike missions. In the underwater domain, autonomous underwater vehicle projects developed by STM and other local companies are maturing.
The AUKUS alliance’s focus on “undersea cable protection” is also of critical importance to Turkey: energy and data cables in the Eastern Mediterranean, Black Sea, and Aegean Sea highlight similar solutions for critical infrastructure security. Turkey’s advantage in this area lies in its ability to develop 100% indigenous and national solutions without export restrictions; this once again demonstrates the strategic value of the Turkish defense industry’s domestic production model, at a time when supply bottlenecks have forced the United States to provide its allies with second-hand vessels.
Frequently Asked Questions
What exactly has changed in the AUKUS plan? Australia will receive three in-service Virginia-class submarines instead of a mix of new and used vessels; additionally, the trilateral alliance has launched its first joint project to develop payloads for uncrewed underwater vehicles (UUVs).
Why second-hand submarines? Due to production bottlenecks and cost pressures at U.S. shipyards. The new Virginia-class submarine production line cannot meet demand; transferring used vessels simplifies the supply chain.
When will the uncrewed underwater vehicles arrive? Initial deliveries will begin in 2027.
What is the SSN-AUKUS submarine? It is a next-generation attack submarine class jointly developed by the three nations, scheduled to enter service in the 2040s. The used Virginia-class submarines will serve as a bridge to this new class.
Conclusion
The May 30, 2026 announcement shows that the AUKUS alliance is not just a submarine sales program, but is transforming into a joint technological-industrial bloc in the field of unmanned underwater systems. Although supply bottlenecks are forcing the use of second-hand vessels, the real competition is shifting to the field of underwater autonomy — an area where Turkey also holds a strong position with its MİLDEN project and its domestic line of unmanned underwater vehicles.
