fedya,
Remember what I said. It is much better to engage the enemy at a distance. Two problems with CIWS.
1. It uses lots of bullets fast, once it is done all you can do is throw potatoes.
2. It turns an incoming missile into incoming junk, that still hits you like shrapnel.
When the enemy gets a shot at you and you need to survive then you want to have a point defense system but the idea in Naval combat is not to draw fire on your position. That may be an Army idea.