The fire control on the Phalanx is somewhat limited but has got better over the years, it had a tendency to lose track if moving too quickly because the radar was part of the gun assembly. Unlike systems like goalkeeper where the radar is part of the base. Still, the major fire control is the ship systems themselves that can extend the range and amount of targets. But the Phalanx CIWS (Close in weapon system- note the word close) has extremely limited range, much less than it can track on its own. Its effective range is 1 mile and maximum range about 3 miles, so a plane has to be flying pretty close to be under any threat.

What is more interesting is watching the main fire control systems of a DDG- a seagull flying in front of them becomes roast when they are on. The Bravo band and other air search radars, when turned on, can take out a cell phone grid over a large area (as we found out). When I was in the Navy, one of the most concerning things was the red lines showing radiation hazards- grew every year. Where we would gossip and smoke, the next year would be an unsafe zone.

And of course the powerplants of some of those warships can and have powered small cities in natural disasters.

There is a lot of power, whether engine power, radiation or firepower, in each of those ships.