Differentiate ECM and ECCM.

• A. ECM aims to degrade or deny enemy sensors; ECCM seeks to counter ECM to preserve own sensor performance.
• B. ECM and ECCM are identical.
• C. ECM improves enemy sensors; ECCM destroys your own sensors.
• D. ECCM aims to degrade enemy sensors; ECM seeks to counter ECM.

Answer: (A)

ECM is about interfering with enemy sensors—jamming, deceiving, or otherwise disrupting their ability to detect or track you. ECCM is the countermeasure side: techniques and processing designed to protect and maintain your own sensor performance in the presence of that interference. So the best description is that ECM aims to degrade or deny enemy sensors, while ECCM seeks to counter ECM to preserve your own sensor effectiveness. The other ideas miss this dynamic: ECM and ECCM aren’t identical, ECCM isn’t about improving the enemy’s sensors, and it isn’t about destroying your own sensors. The pairing is about offensive disruption of the adversary and defensive protection of your own sensing.