That weapon system was the Phalanx CIWS (close in weapon system, pronounced Cwiz)… That was official… It fires 20mm depleted uranium rounds… Another tracking weapon system I worked on could track individual rounds going outbound.
However, Cwiz was called a very different name by weapon system guys like me…
It was called R2 or R2D2 or R2 with a H****. I’ll leave the last name to your imagination… Minion is also perfect.