Australian Navy Addresses Propulsion Defects in Major Ships

The Australian Defence Department is repairing HMAS Adelaide and HMAS Canberra after identifying propulsion system faults.

Updated on Oct. 29, 2026 in Military

Isometric editorial illustration of a large industrial naval propeller assembly in a dry dock, representing Australian maritime defense infrastructure. — The Australian Defence Department is conducting ongoing repairs to the propulsion systems of HMAS Adelaide and HMAS Canberra due to technical defects. AI Illustration. Upload story photo >

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The Australian Defence Department has confirmed propulsion defects in HMAS Adelaide and HMAS Canberra, requiring ongoing repairs. HMAS Choules has been reassigned to cover critical amphibious and domestic support duties while these vessels are sidelined.

Why it matters

This maintenance response is part of a broader departmental review into project performance and industry reliability. The military aims to optimise its maritime capabilities and budget while managing widespread delays across its defence procurement programme.

The Defence Department is managing eighteen delayed or scaled-back projects, with four programmes dropped entirely, as part of an end-of-year budget process. These adjustments occur alongside a transition to robotic mine-clearing systems expected to save up to $100 million.

The players

Australian Defence Department

This is the executive government department responsible for the defence of Australia and the management of the Australian Defence Force.

Royal Australian Navy

This is the maritime branch of the Australian Defence Force responsible for naval operations and the maintenance of the nation's surface and submarine fleets.

The details

HMAS Canberra, commissioned in 2014, and HMAS Adelaide, commissioned in 2015, were both designed for a 30-year service life. The military is also testing robotic mine-clearing systems following trials in Sydney Harbour and may retire existing crewed mine hunters as early as this financial year.

November 2014: Commissioning of HMAS Canberra
December 2015: Commissioning of HMAS Adelaide
29 October 2026: Senate estimates hearing occurred
Next 12 to 18 months: Planned rollout of robotic systems

Political Context

The military's response to these ship defects follows the strategic pattern established by the Australian Defence Department's end-of-year budget process reviews. Opposition scrutiny often centres on the high rate of project delays and the reliability of industry partnerships in maintaining fleet readiness.

The reassignment of assets to cover for the docked ships ensures that essential domestic support and amphibious capabilities remain available to the public. Taxpayers should note that the department is actively working to consolidate budgets and reduce spending through the implementation of new robotic systems.

The takeaway

The navy is currently prioritising the repair of existing assets while accelerating a transition to more cost-effective, automated technologies. This strategic shift highlights a broader move toward long-term efficiency within the defence sector to offset recurring project delays.