Which is a key ICS characteristic?

• A. Every firefighter always reports to a single supervisor
• B. Command is passed to the second-in unit upon its arrival
• C. Command is always transferred to a ranking officer
• D. The operations section chief is activated on every incident

Answer: (A)

Unity of command is a fundamental ICS principle. It means every responder reports to only one supervisor at a time, which prevents conflicting instructions and clarifies accountability. The statement that every firefighter always reports to a single supervisor directly reflects this idea, making it the best fit for a key ICS characteristic. In practice, command can still transfer to the appropriate leader or function when needed, but the essential rule remains: each person has a single superior guiding their actions. The other scenarios describe transfer mechanics or activation decisions that depend on incident size and structure, but they do not define the universal relationship of reporting that unity of command establishes.