Which of the following is a Passive measure?

• A. Foot patrols
• B. Cover
• C. Liaison with fire support
• D. Patrolling

Answer: (B)

Passive measures reduce your vulnerability without requiring you to move or actively engage the enemy. Cover fits this because it uses terrain or structures to block or absorb enemy fire, giving protection simply by being behind it. It doesn’t require you to shoot, advance, or coordinate actions to gain protection; the safety comes from the position itself.

Foot patrols and patrolling are active—they involve moving, seeking information, and potentially exposing you to risk. Liaison with fire support is a coordination task to enable fires, which is proactive rather than providing direct protection. So the option describing cover is the best example of a passive measure.