The Phalanx is seen as the last line of defense, but it got the job done. The Gatling Gun-style weapon, which is based on the 20mm M61 Vulcan autocannon, can fire 20mm x 102mm rounds at an ...

Meanwhile, the 20mm Oerlikon still arms some naval units, nominally as a last-recourse anti-air weapon (somewhat akin to the Phalanx CIWS, albeit with nowhere near the impressive buzzsaw-like rate ...