Which of the following is a type of ELINT?

• A. TECHELINT - SEI
• B. OPELINT
• C. TELELINT
• D. HFLINT

Answer: (B)

ELINT is about gathering intelligence from electronic signals that are not used for human communications, with radar and similar emitters being a common focus. One branch of ELINT concentrates on how those emitters are used in real-world operations—the operational side. This is what OPELINT covers: figuring out where radar sites are, how they’re deployed, their typical patterns and ranges, and how they affect planning and tactics. It provides the practical, battlefield-oriented intelligence that helps with maneuver, countermeasures, and threat assessment. Technical ELINT, by contrast, would center on the signal characteristics and equipment itself, not how the emitter behaves in operation, and the other terms aren’t standard classifications in this context. So the best fit for the type of ELINT asked about is OPELINT.