I wonder if it is technically possible that two faced rotating naval radar.
For instance Cenk-S rotating together with Mar-D which is X band.
İt would give 360 degree coverage at real time. Also your CIWS wouldn't require additional radars.
Although 4 Fixed panel AESA radars is best solution , Rotating two radar would be cheaper as well as using two different bands would be better.
Moreover when you need to hide your ship , you could turnoff Cenk-S and switch MAR-D with less emition .
There are Russian and Chinese old gen two faced naval radars.
en.wikipedia.org
ru.wikipedia.org
www.radartutorial.eu
İmagine Cenk-S band and MAR-D X band are rotating together. There would be no gap against Anti-ship missiles for reasonable cost.