Kurt, tankers flexibly together would not be stealth and therefor a target. Pykrete would not be stealth, it would however be heavy enough to average wave height. 90/10
Richard
Thanks, this dual use ship idea certainly needs a paint job to increase stealth, as well as a design that doesn't create too many surfaces with different angles.
My modified idea is a slight modification of current fleet supply ship designs that can do civilian transports in peacetime and take over additional jobs in wartime (or free peace time military transports for these tasks). Custom building them for dual use offers a great possibility to increase triphibic capabilities.
There are two abilities that need to be integrated other than transporting goods, fuel, self-defense and a design that avoids enemy detection.
You need to load ground forces with their equipment and landing crafts (possibly in an elevator) and it must be able to land on deck, rearm and refuel rotary wing aircrafts with their base on other specialized ships (for range extension), like helicopter carriers/commando carriers.
Part of the equipment of ground forces can be suitable to quickly set up an airfield (including all-round defense) for fixed wing aircrafts of any size on any strip of land with supply ships replacing the storage of a carrier (a Land Ship Tank - LST design would be best) and offering the ability to switch positions on island chains for example. The ability for maritime range extension with air cover can be achieved at a lesser cost than an aircraft carrier and because of the ability to integrate large long range tankers overs longer stand off ranges. The downside is that capability for fixed wing aircraft bombing sorties won't equal that of aircraft carriers, but you can set up a fighter cover and do the destruction with triphibic operations instead (probably at a fraction of the material costs, but with more own loss of own life).
Concerning China, they won't be able to do totally without aircraft carriers, but this offers the possibility to use their current fleet structure to secure the most important part of their SLOC and coasts with a sea control ability equal to carrier forces at a fraction of their costs and would nicely improve area denial with unsinkable carriers (British term for their bases) on the island chains.
While stealth and self-defense ability are nice, sinking a fleet of thousands of fishing boats that deliver goods to offshore island air bases is a nightmare in asymmetric warfare costs because the missile/torpedo to destroy the shipping boat costs several times more than the target. The target is part of naval warfare system that limits operational options for destroying these boats with means other than long range precision strikes.
The idea to create large swimming off-shore mobile bases is rather stupid, as I realized because they are the most visible and most expensive target you can provide. Current PLAN concepts about dual use with large numbers of vessels are better.
Rethinking the pykrete idea, it's a cheap armour that is hard to destroy, use it for something small like a buoy or something that needs to be flexible and solid, like a makeshift landing dock for a new island base.