Looking to the future, specifically the PRC's SSN expansion programme, can the Aussies afford not to go nuclear?
SSN vs SSK in deep water has to be a one sided engagement. Submerged speeds alone will give a modern SSN a severe advantage over a much slower SSK. unless the latter is waiting in ambush for the SSN to pass through known sea lanes/choke points . If Aus has to deploy Subs for long periods to protect it's sea lanes against an SSN threat, will a large conventional Collin's II have the endurance and range to allow for long enough deployments in deep water? A modern SSN can remain on patrol for four months + (longer in austere conditions). Plus a sub is vulnerable whilst in port, longer deployments reduce port down-times. One way I would mitigate Australias subs is to attack the supporting Naval base and severely impact turn around times. Basically grandslam the sub-pens as they did in WWII.
SSN vs SSK in deep water has to be a one sided engagement. Submerged speeds alone will give a modern SSN a severe advantage over a much slower SSK. unless the latter is waiting in ambush for the SSN to pass through known sea lanes/choke points . If Aus has to deploy Subs for long periods to protect it's sea lanes against an SSN threat, will a large conventional Collin's II have the endurance and range to allow for long enough deployments in deep water? A modern SSN can remain on patrol for four months + (longer in austere conditions). Plus a sub is vulnerable whilst in port, longer deployments reduce port down-times. One way I would mitigate Australias subs is to attack the supporting Naval base and severely impact turn around times. Basically grandslam the sub-pens as they did in WWII.