When "danger close" is announced, what must be passed to the attacking aircraft?

When "danger close" is announced, it signifies that friendly troops are in close proximity to the target area where the air strike will occur. In this context, it is essential to convey the Ground Commander's initials to the attacking aircraft. This procedure validates that the commander is aware of the risk to friendly forces and has approved the engagement despite the proximity. It serves as a form of accountability and ensures that the decision to strike has been fully considered with respect to the potential risks involved.

Providing the Ground Commander's initials helps affirm the authority behind the decision, which is crucial in high-stakes situations where the safety of troops is at risk. This approval demonstrates that appropriate coordination and assessment have taken place before proceeding with the strike.