Which of the following is NOT one of the three technology issues facing UAS full integration?

• A. Reliability
• B. Detect and Avoid technology
• C. Control link security
• D. Battery life

Answer: (D)

The main idea here is identifying which items are recognized as the key technology challenges for fully integrating UAS into the airspace. The three that are typically cited are reliability of the aircraft and its systems, detect-and-avoid capabilities to prevent collisions, and security of the control link to protect communications and command integrity. Battery life matters a lot for how long a drone can fly and complete missions, but it isn’t counted among these core technology challenges. It’s an important operational constraint rather than a fundamental safety or security technology category. Reliability ensures systems perform consistently; detect-and-avoid provides automatic collision prevention; and control link security protects the communication channel from interference or tampering. So battery life isn’t one of the three technology issues, making it the correct choice in this question.