In the two-part marking system for indicating which rooms have been searched, which symbol means a search is complete?

In the two-part marking system used by firefighters to indicate the status of searches within a structure, the symbol representing a completed search is an "X." This symbol clearly conveys to firefighters and other responding personnel that the area has been checked, enhancing communication and safety during operations.

The marking system is critical for ensuring that all areas are accounted for during a firefighting or rescue operation. Each symbol has a specific meaning that enables teams to quickly assess which rooms have been searched and which have not. The "X" serves as a distinct and easily recognizable mark that signifies completion, thereby preventing confusion or redundant searches.

Understanding the significance of each mark in this system is essential for operational efficiency and can directly impact the safety of both firefighters and potential victims inside the structure. Proper use of these symbols is part of the training provided to ensure consistency in communication protocols during incidents.