I don’t see the argument about having to develop a supply chain for an orphan group of ships as valid. We have Multiple classes of ships that are 1 or 2 offs. The LCS if they were in good condition and at the right price with their ability to carry 2 Helicopters and with large multi mission bays, to me offer a great solution for northern and littoral patrol. My understanding and happy to be corrected is the ISN has corrected most of the propulsion and cracking issues on ships 5+. We don’t need to sail them all the way across the pacific or Indian oceans and some of these ships are under 8 years old And probably way cheaper than do another ANZAC upgrade While waiting fir the next line of MFUs to come on line.
First, consider what the likely condition of the LCS being decommissioned so early are. The first two LCS to be put into reserve and it has been estimated that it would have cost USD$2 bil. to get the first four LCS, two each of the
Independence-class and
Liberty-class LCS prepped for sea service.
Also consider the engine and transmission problems with the combining gear for some of the LCS. This part of why so many of the LCS have been getting either retired, or put forward by the USN to be retired. Fixes have been developed, but the time and cost to apply the fixes to already built vessels has in many cases deemed too expensive and not worthwhile, and from my understanding it would require essentially cutting apart the vessel to remove the faulty gearing design and install a functional one. As it stands now, the USN has decommissioned I believe five
Freedom-class LCS, and two
Independence-class LCS, with the longest serving having been commissioned for ~13 year whilst the shortest time in commission was ~five years.
Think about that, seriously, the USN decommissioned new warships which cost ~USD$360 mil. (not including the mission modules) within five years of their commissioning. That should be an enormous warning sign that there are issues with these specific vessels. These issues are potentially fixable, but the USN decided that the cost to do so was not worthwhile, which in turn strongly suggests to me that it would not be worthwhile for the RAN to attempt to 'fix' them.
This is particularly true in light of their overall systems which are not in use by the RAN and therefore RAN personnel would need to become familiar with operating and repairing completely new CMS, radars, machinery and weapons. Similarly, the RAN would need to establish maintenance capabilities including sources of parts and spares. Perhaps more importantly, the vessels as fitted out are not believed to be survivable without escort in hot contested areas with the main offensive and defensive systems consisting of a 57mm Mk 110 gun, and a 21-missile RAM launcher for missile-based CIWS.
Also due to the nature of the design and in order to achieve the speeds desired of ~45 kts, there is very little weight margin available to fit new/replacement systems, or have much extra embarked aboard.
The last thing to consider is where would the crew come from? Yes, they have relatively small crews, but the USN has also found that crews of this size are not able to keep up with the proper maintenance of the vessels and need additional support from personnel ashore when docked. Given a choice between getting a trio of LCS, or keeping an
ANZAC-class frigate in commission, I would keep the frigate as IMO it is a more capable vessel overall.