Where should CBRN markers be placed in terms of height?

• A. Eye height
• B. Ground level
• C. Waist height
• D. Shoulder height

Answer: (C)

Markers placed at waist height are most accessible and reliably readable for personnel moving through CBRN zones, even when wearing bulky protective gear. This height puts the marker in a comfortable line of sight for someone standing or kneeling, making it quick to spot and read without needing to tilt the head or strain the neck. It also stays clear of ground-level obstacles like mud, water, or debris, and remains visible above short vegetation or obstacles that might block lower markings. Conversely, markers at eye level can be obstructed by gear or walls and may require an awkward read or look-up, while those at higher levels are harder to read while moving or bending, especially with gloves. Ground-level markers risk being obscured by dirt, snow, or splash. So waist height provides the best balance of visibility, readability, and durability for CBRN markers.