What brevity term would you use to begin using briefed communication procedures to counter communications jamming?

The term "Chattermark" is used as a brevity term to indicate that a unit should begin using pre-established, briefed communication procedures to counteract communications jamming. This term signifies a switch to a more secure and resilient method of communication to ensure messages can be transmitted effectively in the face of jamming efforts.

Using "Chattermark" serves as a prompt for all team members to implement their contingency communication strategies that have been designed to maintain operational security and effectiveness. These briefed procedures might include alterations in frequencies or formats, ensuring that critical information continues to flow despite interference.

In contrast, the other terms listed do not specifically pertain to initiating countermeasures against jamming. "Soiled" refers to a system that is compromised but does not denote the immediate action to take. "Net Call" generally pertains to establishing a communication link rather than addressing jamming. "Tampered" indicates unauthorized modification or interference but does not specifically signal a coordinated response like "Chattermark" does. Thus, "Chattermark" is the appropriate term for initiating a counteraction to communications jamming.