MCI 413: first arriving unit duties correspond to which FOG?

• A. Fog #1
• B. Fog #2
• C. Fog #3
• D. Fog #4

Answer: (A)

When a response to an MCI begins, the very first actions on scene are critical for establishing control and safety. The duties of the first arriving unit are defined in the initial Fog, which covers quick scene size-up, hazard identification, establishing incident command, and setting up initial communications and resource requests. This Fog is specifically intended to outline what the first unit must do immediately to stabilize the situation and lay the groundwork for subsequent responders. Because the question is asking which Fog corresponds to those first-arriving-unit responsibilities, the match is the first Fog. As more units arrive, the operation expands under the later Fogs, handling additional tasks and coordination, rather than the initial arrival actions.