They don't need air power for protection from small boats unless the number is very, very high.
It's kinda like Saturday morning target practice:)
And hopefully they don’t have to follow the rules used elsewhere to only fire if fired upon first. How long does one wait as they are speeding to you but not firing - with their intention of ramming you and setting off a kamikaze style bomb?
Hopefully warning shots at the range of 1000 yards and shoot to kill at 700 yards or whatever.
I didn’t think the CIWS can angle downwards that much for surface targets. Either way, I’d sure hate to be on the receiving end of one of those (ouch).