What brevity term signifies a FRIENDLY air-to-surface missile launch?

The term that signifies a FRIENDLY air-to-surface missile launch is "Rifle." This brevity term is used within military communication to indicate that a missile is being sent towards a target. It conveys a straightforward and clear message which helps to avoid confusion in time-sensitive situations. When a soldier or airman announces "Rifle," it informs all parties that the missile has been launched and is on its way to the designated target. This is critical for coordinating efforts on the battlefield and ensuring that everyone is aware of friendly fire scenarios, reducing the risk of miscommunication during operations.

Understanding the use of brevity codes like "Rifle" is vital for maintaining situational awareness and allowing teams to operate effectively in complex environments. The other choices represent different situations or weapon statuses but do not specifically denote a FRIENDLY missile launch, which reinforces the importance of precise terminology in military operations.