Which statement best differentiates reconnaissance and surveillance in a military context?

• A. Reconnaissance is planned information gathering to support a decision; surveillance is ongoing observation to detect and monitor activity.
• B. Reconnaissance is ongoing surveillance to detect activity.
• C. Reconnaissance is a type of enemy activity; surveillance is planning.
• D. Reconnaissance and surveillance are the same.

Answer: (B)

Reconnaissance and surveillance differ mainly in purpose and tempo. Reconnaissance is a planned, targeted effort to gather information to support a specific decision or action. It’s purpose-driven and time-constrained, aimed at answering particular questions (like enemy disposition, capabilities, or routes) so a decision can be made. Surveillance, on the other hand, is ongoing observation to detect and monitor activity over time, maintaining situational awareness and watching for changes.

So the statement that best fits is that reconnaissance is planned information gathering to support a decision, while surveillance is ongoing observation to detect and monitor activity. Confusing reconnaissance with ongoing surveillance misses the planning and decision-support aspect that defines reconnaissance, and treating them as the same or reversing their roles doesn't align with how they’re used in military practice.