Close-In Weapon Systems (CIWS) are defensive armaments designed to protect naval vessels from incoming threats, such as missiles and aircraft. These systems typically feature rapid-fire guns or missile launchers that can engage targets at short ranges, providing a last line of defense against attacks. CIWS are often automated, allowing them to quickly detect and track threats without human intervention. A well-known example of a CIWS is the Phalanx, which uses a 20mm Gatling gun to intercept incoming projectiles. These systems are crucial for maintaining the safety of military ships in hostile environments.