Which of the following is included as a component of the ISR 3-Line?

• A. Target
• B. Weather parameter
• C. Fuel gauge
• D. Engine status

Answer: (A)

The ISR 3-Line format is built around conveying essential reconnaissance information in a compact three-line snapshot, with the object of interest front and center. The reason the target is the best answer is that identifying what is being observed is the defining purpose of an ISR report—the line that tells analysts exactly what needs to be tracked, assessed, or acted upon. The other elements—like weather parameter or engine status—provide important supporting context (environmental conditions that affect sensor performance, or the health of the platform), but they do not define what is being observed. So, including the target ensures the report has a clear focus for interpretation and decision-making.