Regarding that SM-3 "block classification", in the past I've seen blocks IA, IB, II, and IIA with gradual improvements. Now I've come across the IIB version, but articles that talk about that only mention IA, IB, IIA, and IIB.
So are those still the same four evolutions with a difrerent naming, or is there now a fifth evolution state?
I haven't found specs for the IIB, but in the older publishings starting with block II and then also IIA, the diameter is to increase to 21in (& 21' hight), wich just fits the Mk41 (strike length) VLS.
There's rumors that latest version might carry some kind of Multiple Kill Vehicle.
Maybe that needs an even wider warhead, or just a wider missiles for more fuel. Also, it is to engage ICBMs, apparently. I guess that would really mean a wider missiles body. However, as said, I haven't seen any specs for those supposed missiles.
Then these would need Mk57 VLS. I guess refitting those to Burkes and Ticos isn't exactly a simple move, and would mean reduced rounds available, if at all possible.
So, if the Navy is seriously thinking about that and making budget assesments with it in mind, does that reliably point to CG(X) as a new BMD platform in the near to mid future?