What are clear zones?

• A. Unused space on one side of barrier.
• B. Areas for maintenance against weather.
• C. Maintained on both sides of barrier for observation.
• D. Storage for equipment.

Answer: (C)

Clear zones are unobstructed areas kept on both sides of a barrier so observers can see and respond effectively. Maintaining these zones on both sides provides clear lines of sight for sentries, reduces concealment for anyone approaching the barrier, and enables rapid detection and reaction. They’re not simply unused space on one side, nor are they maintenance areas for weather, or storage spaces; they’re deliberately cleared to preserve visibility and safe operation around the barrier. Vegetation, debris, and other obstacles are kept out, and lighting or signs are maintained to support ongoing surveillance.