The SSN speculation continues with this article indicating that “off the shelf Astute’s are off the table”. The concept of a joint US-UK-AU follow-on SSN incorporating the SSN-X & SSN(R) programs has some merit as it would mean that the RAN would get the latest technology that would be upgradable throughout their service life. It also allows time for the shipyards to be prepared/upgraded for the construction & maintenance of these vessels as well as all the companies that will be suppliers to the project.
Defence Connect Astute class off the table
The downside of this is that it would mean a further delay before the RAN SSN’s become operational and may go beyond the Collins class service life, especially the older ones. Because of the potential capability gap, It may require require the construction of 3-4 interim “son-of-Collins” submarines to be built featuring many of the post LOTE systems that will be installed in the current boats. This would keep the maintenance logistics to a manageable level whereas, the introduction and support of a brand new conventional submarine like the highly rated Korean KSS III class would require a massive investment in money and manpower.
Like many, I’m keen to see what the final decision will be.