Which is a limitation of Sentinel?

• A. Unlimited range
• B. No terrain obstacles
• C. Requires clear field of view
• D. Short setup time

Answer: (C)

Sensors like Sentinel rely on seeing targets with an unobstructed path. When terrain features, buildings, trees, or weather block or blur the line of sight, detection and tracking accuracy suffer and blind spots appear. That makes a clear field of view a fundamental limit of this system—the sensor needs a straight, unobstructed view to reliably detect threats and update their positions.

In practice, you mitigate this by choosing elevated or open locations and often deploying multiple sensors to cover occluded areas. The other options describe conditions that aren’t true for Sentinel: range isn’t unlimited, terrain obstacles aren’t absent, and setup time relates to readiness, not the sensing capability itself.