Which correction indicates when to cancel Danger Close?

The choice that indicates when to cancel Danger Close is associated directly with the operational context of fire support. The phrase "Danger Close" is used to communicate that friendly forces are within a specific range of the intended target, signifying that munitions will be fired near these forces and that precise control of the fire mission is imperative.

In this context, the option "Danger Close/Cancel Danger Close" is accurate because it specifies the exact terminology used to indicate whether to initiate or cancel this condition. When there's a need to announce that friendly troops are no longer in harm’s way, the command to cancel Danger Close is crucial for ensuring the safety of all personnel involved, while still allowing for effective fire support.

The other options, while they may pertain to aspects of military communication or operational commands, do not specifically address the criteria for canceling Danger Close conditions. For instance, trajectory concerns more about the path of the ordnance, while mission type or method of control relates to the overall strategy rather than the immediate safety parameters involved with Danger Close. Repeat is a command used to reiterate instructions or requests and does not convey the specifics of canceling the Danger Close status.