What is referred to as the "fatal funnel"?

The term "fatal funnel" specifically refers to the physical spaces that present a heightened risk during an entry or tactical operation, notably doorways, stairwells, and narrow hallways. These areas, due to their confined nature, limit movement and visibility, making individuals vulnerable to potential threats. They funnel individuals into a single approach point, thereby increasing the likelihood that someone inside, if hostile, can target them effectively.

In tactical situations, understanding the dynamics of the fatal funnel is crucial. It allows boarding teams to strategize and mitigate risks when entering or clearing a space. By acknowledging these high-risk areas, teams can implement techniques to cover angles, minimize exposure, and control the environment more effectively. The significance of recognizing fatal funnels lies in promoting safety and operational effectiveness during operations.