Originally Posted by RustyBattleship

That is most definitely a CIWS Phalanx mount. I've had to design structures to support them on several different classes of ships (including 4 each on all 4 BBs).

Since the mount was designed for rapid traverse and rapid elevation, it would be an ideal base unit for a carbon-dioxide pulse laser. You know, the one that melts down incoming 8" artillery shells. There's a YouTube on it (though the unit they show is circular) but I don't know how to post it.