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Australia built six submarines to rule the seas — defective welds and noisy propellers turned them into a national embarrassment

Summary and Key Points: Australia's six Collins-class submarines were meant to be the pride of its navy. Instead came defective welds, propellers too loud to hide, and a combat system so bad the Navy ...
The Diplomat

Australia’s Submarine Problems

In 2009, the Australian government recognized the need to replace its aging Collins-class submarines. What followed has been a mess of indecision, changing plans, and squandered opportunities. HMAS ...
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The US Navy’s nuclear-powered aircraft carriers can be killed by diesel submarines — Australia proved it 26 years ago

Australia's HMAS Waller, a Collins-class diesel-electric submarine, 'notionally' sank a U.S. Navy nuclear-powered aircraft carrier in a wargame simulation and several escorts at the RIMPAC 2000 ...