If a signal indicates all secure after a drill, which code would have been used?

• A. Code 10
• B. Code 2
• C. Code 5
• D. Code 3

Answer: (A)

In this kind of system, codes are used to convey status quickly across the base after a drill. When the drill is finished and everything is secure, the code that signals an all-clear is used. That code tells everyone there’s no active threat, the area is secure, and normal operations can resume. That’s why it’s the best answer: it directly communicates that the post-drill status is all clear. The other codes represent different states—such as ongoing threat, drill still in progress, or partial security—but they do not indicate that the situation is fully secure and the drill is over.