"Surface-to-Air" refers to a type of missile or weapon system designed to target and destroy aircraft from the ground. These systems are typically launched from the surface, such as from military bases or ships, and are used to protect airspace from enemy aircraft. They can vary in range and capability, from short-range systems to long-range missiles. Common examples of surface-to-air systems include the Patriot missile system and the Stinger missile. These weapons are crucial for national defense, providing a means to counter aerial threats and maintain air superiority. Their effectiveness relies on advanced radar and tracking technology to identify and engage targets.