IMO they will build another 12 more, so each fleet would be have 3 flotillas (36 Total).
Further, we know that 056 will touch to 60 means all 3 fleets would have 5 flotillas and will complement 054As for First Island Chain, will be quite sufficient...
I expect production to end at 24 and for a successor design to be built soon after.
I expect 056s to at least reach 60 units given how versatile they are, especially in the ASW role in green water and the littorals.
What if the 054A is used to serve as the backbone of the "within First Island Chain" PLAN fleet together with the 056? Are 24 054A's sufficient?
I think the future PLAN's future ships will be distributed among a "home fleet" that can be separated into one or two "combined home taskforces" for use in westpac, as well as one or two blue water "expeditionary taskforces" and maybe a few smaller ocean going "surface action groups".
I see no reason for the three fleet arrangement to be abolished, however I do expect different fleets will have rotating contributions to the "expeditionary taskforces". Once PLAN has three or more carriers, three or more LHDs and six or more LPDs distributed among the three fleets they can rotate those power projection ships for blue water patrols with escorts drawn relatively equally from the three fleets.
The rest/majority of the navy remaining at home will still retain carriers and amphibious assault ships and destroyers, and frigates, etc for operations within the first island chain. During peacetime most of the home fleet will remain a fleet in being situated at port, allowing the crew to rest, but during times of crisis in westpac or 1st island chain I expect all available ship types at home to be mobilized.
In other words, I do not expect 054A and other frigates to become the backbone of the PLAN's westpac or even first island chain's operations during peacetime and definitely not during wartime. But instead I expect one or more combined task forces consisting of blue water capable PLAN vessels including carriers, amphibious assault ships, destroyers, frigates to act as the primary offensive and defensive formations operating in westpac with SSNs and SSKs as well, supported by SSKs, corvettes, and FACs in more defensive positions closer to home waters.
Say, if we take a very conservative estimate of the PLAN's primary combatants and power projection vessels by 2030:
36 modern blue water capable frigates (24 054A + 12 next generation frigates)
18 modern blue water capable destroyers (12 052D + 6 052C)
8 modern blue water capable large destroyers (6 055s)
8 older blue water capable destroyers (2 052B, 2 051C, 4 Sovs)
3 LHDs
6 LPDs
3 carriers (Liaoning, CV17 and CV18)
During peace time I would expect maybe an "expeditionary task force" deployed in blue water made up of: 1 carrier OR 1 LHD + 2 LPDs, and 1 055 escort, 2 052C/D escorts, 4 054A or next gen frigate escorts
That would leave 2 or 3 carriers and 2 or 3 LHDs and 4 or 6 LPDs, along with 7 055s, 16 052C/Ds, 32 frigates at home available for missions in westpac.
Even if we draw away a few more ships to act as SAGs in blue water, say two SAGs each with 1 055, 2 052C/Ds, 2 frigates, that still leaves quite a number of surface combatants at home.
The point I'm getting at, despite China's blue water goals, it will likely still concentrate most of its forces for home defence. And westpac and even the first island chain, are very much large enough where large CSGs and combined taskforces can roam and fight against each other. It would be foolish to only leave frigates at home during peacetime, and it would be death to send only frigates against potential opposition during wartime given the kind of opposition PLAN faces.
Frigates will probably remain the single largest "number" of vessel type for PLAN for the future (assuming we don't count 055s as DDGs in the same weight class as 052C/D), however in westpac and the 1st island chain during wartime they will act as pickets and escorts for large formations rather than the primary offensive/defensive backbone of a formation.
During peacetime frigates may conduct a significant portion of 1st island chain patrols, but I also expect 052C/Ds and 055s, as well as older DDGs like 051C, 052B and Sovs, to make a significant contribution.
Capabilities necessary for blue water missions such as carriers, large destroyers, and amphibious assault ships are just as necessary at home in the first island chain as they are in the Indian Ocean or elsewhere -- in fact I'd say they're more necessary closer to home.
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In the forseeable decades the PLAN's ship distributions may best be seen similar to the Royal Navy during/on the eve of WWI.
A large, immensely capable "Grand Fleet" deployed at home made up of a number of smaller fleets/taskforces constituting the majority of the navy's order of battle, against a powerful naval foe operating close to home (German High Seas Fleet), but also a number of significant but smaller taskforces and detachments around the globe (e.g. Mediterranean, asia, Australia, NZ)