Presumably Seamaster 400 can handle any sort of target designation/illumination/etc that indigenous SAMs might require?
most likely. it is not mentioned in the data sheets I have seen. one things is for sure though: the I-mast has no radars that serve as directors only. so I think the SMILE (seamaster) can do illumination too, at least for guns (as there is no ship build yet with I-mast and missiles)
it is possible, that with missiles, an director would be placed on top (such as I drew) or that an apart director would be added. but most likely the SMILE does it, indeed.
also, what is that talk about the SPS-49 in this thread?