A Phalanx CIWS (Close-In Weapon System) is a rapid-fire, automated gun system that serves as a warship's last line of defense against anti-ship missiles, aircraft, drones, and small boats, using its own radar for autonomous search, tracking, and engagement, and can also be used on land against rockets, artillery, and mortars (C-RAM). Nicknamed "R2-D2" for its shape, it features a high-rate-of-fire 20mm Gatling gun and evolved through blocks (like the FLIR-equipped Block 1B) to handle slower thre