The Standard Missile-2 (SM-2) is a naval surface-to-air missile designed to provide air defense for ships. Developed by Raytheon, it is capable of engaging a variety of aerial threats, including aircraft and anti-ship missiles. The SM-2 is launched from vertical launch systems and can be guided to its target using semi-active radar homing. The missile has undergone several upgrades since its introduction in the 1970s, enhancing its range and effectiveness. It is widely used by the United States Navy and allied naval forces, contributing to maritime security and defense operations around the world.