What is CAS augmented by machine-to-machine exchange of situational awareness and targeting messages?

The correct answer is DACAS, which stands for Digital Army Common Operating Picture and Joint Able (Digital Army Common Automated System). This system enhances Close Air Support (CAS) operations by integrating machine-to-machine exchanges of situational awareness and targeting messages. It facilitates more timely and accurate communication between different units and platforms, thereby improving battlefield efficiency and decision-making.

By utilizing digital data exchange, DACAS allows for seamless integration of information and coordination between ground forces and air support, thereby enhancing the overall effectiveness of military operations. This capability is vital in modern warfare, where rapid response times and precise targeting are crucial for mission success.

The other terms do not specifically refer to the integration of machine-to-machine communication in the context of Close Air Support, focusing instead on different aspects or functions of military operations.