Which ECM technique helps locate a target by intersecting lines of sight from multiple sensors?

• A. Track Correlation
• B. Triangulation
• C. SOJC Operations
• D. Sensor Fusion

Answer: (B)

Locating a target using lines of sight from multiple sensors hinges on a geometric idea: when each sensor points toward the target, those lines of bearing intersect at the target’s position. This intersection is what we call triangulation. With two or more sensors, you plot the lines on the same map and the point where they meet gives the target's location. The more sensors you have, the more robust the estimate becomes, and in real systems, you account for measurement errors by finding the best-fit intersection (often using a least-squares approach) if the lines don’t cross perfectly.

Other approaches focus on different tasks—tracking the same object over time to maintain a continuous track, or combining data from sensors to improve measurements—without directly solving the target’s position from intersecting bearing lines. Triangulation is the method that directly uses multiple viewpoints to pinpoint where the target is.