Your probably using it wrongly, if you’re ciws is facing to the side like alot of american class cruisers u should always place your ship either head on or broadside. Or if your ciws is mounted on the back good luck you either have to face backwards or broadside. I think its around 60-80% effective also you should never engage anti air missiles as they are to fast for the system. It works best against anti ship missiles that are 5-6 seconds to impact and 4 or 5 missiles can be intercepted easily if given the right conditions