Toward Decline
Submarine maintenance delays, ‘idle time’ cost $3.4 billion, GAO says
Why it matters
The GAO report reveals a structural crisis in US Navy submarine maintenance and shipyard capacity that directly jeopardises AUKUS delivery timelines and Australia's submarine-acquisition roadmap. US shipyard constraints, idle-time ballooning to 15 attack submarines and $3.1B+ in wasted operating costs (2026–2030), and decommissioning delays stretching to 45 months signal that the US industrial base cannot support both its own fleet modernisation and concurrent tech transfer to Australia without further slippage or downsizing.
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