AUKUS Formally Revises Submarine Plan: Australia to Acquire Three In-Service Virginia-Class SSNs; First Pillar II UUV Project Announced

The three AUKUS nations announced a significant revision to Australia's nuclear-powered submarine acquisition pathway at a trilateral defense ministers' meeting on the sidelines of the 23rd IISS Shangri-La Dialogue in Singapore (May 29–31, 2026). US Defense Secretary Pete Hegseth, Australian Defense Minister Richard Marles, and UK Defense Secretary John Healey confirmed Australia will now acquire three in-service (secondhand) Virginia-class nuclear-powered attack submarines, replacing the previously planned mix of one new-build Virginia and two in-service boats. The change reflects updated assessments of US shipyard production capacity: General Dynamics Electric Boat and Huntington Ingalls Industries remain constrained by existing USN build orders, making delivery of a new-build Virginia on the required timeline infeasible. The revised plan reduces near-term production pressure on US yards while providing Australia equivalent nuclear-powered submarine capability. The Submarine Rotational Force-West (SRF-West) at HMAS Stirling, Western Australia remains on schedule to begin operations in 2027. The SSN-AUKUS design — a next-generation class to be built jointly by Australia and the UK incorporating US nuclear technology — continues as the long-term program for Australian indigenous nuclear-powered submarine capability. Additionally, the ministers announced the inaugural Pillar II signature project: joint development of Uncrewed Undersea Vehicle (UUV) payloads with deliveries beginning in 2027 — delivering tangible, deployable capability under AUKUS's advanced capabilities pillar ahead of the submarines. At the Shangri-La Dialogue's first plenary session, Hegseth described AUKUS as central to US Indo-Pacific strategy, framing it within a 'new era of pragmatic idealism' and emphasizing that the recent US-China summit's 'strategic stability' agreement does not diminish US treaty commitments to allies. The AUKUS near-term cost (AUD $71–96B, revised upward 34% in April 2026) covers the three in-service Virginia acquisition.