What principle is demonstrated when an engine company officer relays all radio traffic through the Division 2 supervisor?

The principle illustrated when an engine company officer relays all radio traffic through the Division 2 supervisor is Unity of Command. This principle ensures that each individual involved in the incident response reports to one and only one supervisor or officer. This structure enhances the efficiency of communications and decision-making during an incident by establishing clear lines of authority and responsibility.

In this scenario, by directing all radio communications through the Division 2 supervisor, the engine company officer is adhering to the Unity of Command principle. It helps prevent confusion and conflicting orders, allowing for more coherent and organized incident management. This is essential in emergency situations where effective communication can significantly impact operational outcomes.

While the other principles, such as Chain of Command, may relate to organizational structures, they do not specifically capture the essence of ensuring that each individual has a single point of contact for commands, which is the core of Unity of Command.