Search and rescue marks should be placed:

• A. On the lower third of the door, the lower third of the adjacent wall, or in the landing of the adjacent stairs
• B. On the lower third of the adjacent wall
• C. In the landing of the adjacent stairs
• D. On the ceiling

Answer: (A)

Marks should be placed where they’re most likely to be seen by other rescuers as they move through a smoke-filled or debris-filled environment. The lower third of the door, the lower third of the adjacent wall, or on the landing of the adjacent stairs keeps the mark at a visible, practical height and in a predictable location. This height stays within typical line of sight and is not easily obscured by smoke, heat, or clutter, so teams can quickly confirm a space has been searched and know where to look next. Placing marks on the ceiling is avoided because marks up high are easy to miss in poor visibility. Marking on the door or nearby surfaces (wall or stair landing) also helps when doors are left open or partially blocked, ensuring the mark remains in view from the approach.