Which of the following is NOT one of the five methods of communication in the military?

The five methods of communication in the military focus on established channels that convey information effectively and efficiently. Visual communication utilizes sight to convey messages, such as signals, diagrams, or visual aids. Sound communication includes auditory means like voice commands, alarms, and other audible signals. Messenger communication refers to the use of individuals or systems to relay messages from one point to another.

Airborne, while it may seem related to military operations and communications involving aircraft, is not categorized as a standard method of communication. It suggests a mode of transportation rather than a communication method itself. This distinction underscores the fundamental nature of communication methods in the military, which are designed to ensure clarity, immediacy, and effectiveness in relaying information and orders.