What is the planned size of the Australian production hall?
If it’s similar to that at Barrow it would hold 3 subs in construction - one finishing build, one mid-build and one starting. Assuming a 10-12 year build time that’s one entering service every 5-6 years, which with a 30 year life would be able to maintain a fleet size of 5-6 boats.
An experienced team might get that down to 8 years - the current time to build a Virginia class, rolling one off the stocks every 4 years, which would maintain a fleet of 7-8 boats.
After that you are looking a hall/line able to build 4 at a time.
