Here is an image of a Collins Class Submarine down at Port Adelaide going through its drills.
According to Wikipedia…
The Collins class of six Australian-built diesel-electric submarines is operated by the Royal Australian Navy (RAN).
The Collins class takes its name from Australian Vice Admiral John Augustine Collins; all six submarines are named after significant RAN personnel who distinguished themselves in action during World War II.
The boats were the first submarines to be constructed in Australia, prompting widespread improvements in Australian industry.
The full size of this image is 2834 x 1889 and it can be purchased for $10 at the store.