Attack-class submarine (Cancelled)

Attack-class submarine (Cancelled)
Name	Attack-class submarine (Cancelled)
Caption	Conceptual artist's impression of Attack-class submarine design studies
Type	Diesel-electric and air-independent propulsion attack submarine (planned)
Builders	Naval Group (formerly DCNS), Submarine Consortium participants
Operators	Royal Australian Navy (planned)
Ordered	2016 (program start)
Cancelled	2021–2023 (program termination and replacement decisions)
Fate	Program cancelled; alternative arrangements pursued

Attack-class submarine (Cancelled)

The Attack-class submarine was a planned class of conventionally armed attack submarines intended for the Royal Australian Navy to replace the Collins-class submarine. Announced as the centrepiece of a major naval modernisation, the program selected designs from Naval Group of France (formerly Direction des Constructions Navales Services) and involved industrial partnerships across Australia, France, and allied shipbuilding firms. After protracted development, cost escalation, schedule slippage, and shifting strategic priorities, the program was cancelled and superseded by alternative procurement pathways.

Background and development

The project emerged from assessments by the Defence White Paper 2009 and subsequent Australian strategic reviews that identified submarine capability as critical to operations in the Indo-Pacific and to deterrence in littoral and blue-water environments. The Commonwealth of Australia launched the Future Submarine program to replace the aging Collins-class submarine fleet, initiating a competitive evaluation that included proposals from Naval Group, Kawasaki Heavy Industries, and consortiums involving Babcock International, ThyssenKrupp Marine Systems, and General Dynamics Electric Boat. In 2016 the Australian Government selected the Shortfin Barracuda design from Naval Group as the basis for a bespoke Attack-class, aiming to leverage technologies from the French Barracuda-class submarine program and to localise construction at the ASC Pty Ltd shipyard in Adelaide with supply-chain work across South Australia and other states.

Early development plans linked the program to industrial policy objectives in the Shipbuilding Plan 2017 and to workforce initiatives coordinated with the Department of Defence and the Australian Industry Group. Strategic partners included the Office of National Assessments and signals agencies collaborating on sensor and weapons integration. However, independent reviews by the ANAO and contracted technical audits flagged design maturity, cost projections, and technical transfer challenges.

Design and specifications

The Attack-class design was to be based on the conventional-propulsion variant of the Barracuda-class submarine family, modified to Australian requirements including larger range, endurance, and payload for operations in the Southern Ocean, Coral Sea, and western Pacific. Planned specifications cited displacement increases versus the Collins-class submarine, with an estimated length and beam to accommodate enhanced combat systems such as the MILDEC-class combat management suite, long-range torpedoes like the Mk 48, and potentially land-attack cruise missiles. Propulsion concepts included diesel-electric drive augmented by air-independent propulsion modules drawn from French experience and discussions with Ateliers et Chantiers de la Méditerranée.

Sensors and stealth features proposed integration of flank array sonars, bow-mounted spherical arrays, towed arrays, and low-observable hull treatments informed by acoustic research from the Defence Science and Technology Group. Crew accommodations, automation, and habitability upgrades were to align with best practices from the United Kingdom Royal Navy and United States Navy conventional submarine programs, with local Australian training supported by exchanges with the French Navy and allied submarine schools.

Procurement process and cancellation

The procurement process combined competitive evaluation, bespoke design development, and industrial offsets anchored by a 2016 government decision. Cost estimates escalated rapidly with successive reviews; the Australian National Audit Office and parliamentary budget committees reported mounting schedule risk and increasing sovereign-risk concerns. In 2021 the Australian Government entered into the trilateral AUKUS partnership with United Kingdom and United States, which reshaped strategic assumptions by offering nuclear-powered submarine pathways via collaboration with United States Navy and Royal Navy nuclear programs. Subsequent announcements and contracting decisions resulted in the formal cessation of the Attack-class acquisition, with program elements either wound down, renegotiated, or repurposed toward alternative submarine acquisition and capability sustainment activities.

Political and strategic implications

The cancellation had immediate political salience across federal and state electorates, intersecting with debates over industrial policy in South Australia and national defence posture in the Indo-Pacific Strategic Environment 2021. Opponents and proponents framed the decision through lenses of sovereignty, strategic reach, and alliance management involving the United States, United Kingdom, and France. The termination affected bilateral relations, most notably triggering diplomatic strains between Australia and France that led to public exchanges and contract disputes. Strategically, shifting to a nuclear-powered trajectory under AUKUS altered basing, training, and logistic requirements and prompted parliamentary and parliamentary committee scrutiny of force-structure trade-offs and timelines for achieving submarine availability.

Reactions and controversy

Reactions spanned parliamentary debates in the Australian Parliament, statements from industry leaders at the Australian Industry Group and shipbuilding unions, and commentaries from strategic analysts at institutions such as the Lowy Institute and Grattan Institute. Critics cited lost jobs, sunk costs, and procurement mismanagement documented in reports by the Australian National Audit Office and senate inquiries, while defenders highlighted alliance benefits with the United States and accelerated access to nuclear-propulsion technologies. The cancellation precipitated legal and contractual disputes involving Naval Group and Australian suppliers, and generated media coverage in outlets across Canberra, Paris, and allied capitals.

Legacy and impact on future submarine programs

Although cancelled, the Attack-class program influenced future Australian submarine policy by clarifying industrial shortfalls, technology-transfer challenges, and requirements for sovereign sustainment. Lessons learned informed capability planning documents and shaped the structure of the subsequent AUKUS roadmap, workforce development initiatives in South Australia, and cooperative arrangements for maintenance, logistics, and training with the Royal Navy and United States Navy. Technical studies, infrastructure investments atOsborne Naval Shipyard and skill development programs remain enduring legacies that continue to affect Australia’s submarine acquisition, doctrine, and regional deterrence posture.

Category:Cancelled military projects of Australia Category:Submarine classes