In Structure Fire SOG Command Mode, what must be met prior to interior attack operations?

• A. Two In / Two Out rules of engagement MUST be met before interior attack operations
• B. Deploy primary attack hose lines
• C. Shut off utilities
• D. Announce Accountability Collection Point

Answer: (A)

Two-In/Two-Out is a safety requirement that must be in place before interior fire attack can begin. It means at least two firefighters are inside the structure working, while at least two more remain outside ready to assist or perform a rescue, with reliable radio communication and a clear accountability process. This setup provides an immediate rescue option if interior conditions deteriorate and ensures there is a trained team outside to monitor and support the interior crew. While deploying attack lines, shutting off utilities, and establishing an accountability point are essential parts of structure fire operations, they do not by themselves satisfy the prerequisite for interior entry. The two-in/two-out arrangement is the mandatory safety precondition for interior operations in Command Mode.