A long 84 page primer dated Novmber 2020 by experts.
Document under copyright. See:
https://www.aspistrategist.org.au/why-does-australia-need-12-submarines/
https://www.aspi.org.au/report/submarines-your-questions-answered
84 page Document .PDF( 3.19 MB ) at https://s3-ap-southeast-2.amazonaws.com/ad-aspi/2020-11/SR%20161%20Submarines_Your%20questions%20answered.pdf?wIOA0OmHVANberKRdkahqghNwBef796O
Pages 20-22: good on Australia's submarine history.
Pages 25-28: Australia's submarine history including Secret operations
Pages 31-41: 12 future Attack-class submarines
Page 45 crewing and some issues.
Nuclear issues.
Other