What does the term "Danger Close" refer to in a CAS operation?

The term "Danger Close" in a Close Air Support (CAS) operation specifically refers to the situation where friendly forces are located very near to the target being engaged by air support. This phrase indicates that there is a risk to the friendly forces, as the munitions or ordnance being delivered may fall within a safety radius that could potentially affect them. The use of this term emphasizes the critical importance of precise targeting and coordination to minimize collateral damage and ensure the safety of all personnel involved.

In CAS operations, establishing the "danger close" guidelines is crucial for command and control, ensuring that aircrews understand the proximity of friendly units and can act accordingly to protect them.