In air operations, what does CAS stand for?

The correct answer, Close Air Support, refers to a tactical mission where aircraft are used to provide support to ground troops engaged in combat. This support is typically aimed at enemy forces that are in close proximity to friendly forces, ensuring the aircraft can deliver munitions or other forms of assistance without endangering the troops they are protecting. Close Air Support is crucial in modern warfare, allowing for rapid response to evolving threats on the battlefield while maintaining a focus on troop safety and mission success.

Understanding this definition helps differentiate it from other terms that might also have military implications but do not specifically relate to the support of ground forces in close proximity to the enemy. The focus on close proximity distinguishes Close Air Support from similar concepts such as Combat Air Support, which could imply a broader range of aerial operations.