What method is categorized as passive jamming?

• A. Electronically disrupting the radar.
• B. Using radar decoys.
• C. Dropping chaff.
• D. Publishing false signals.

Answer: (C)

Passive jamming involves strategies that do not actively interfere with the radar signals in real-time but instead employ techniques that confuse or mislead radar systems. Dropping chaff is categorized as passive jamming because it involves deploying a cloud of small metallic strips or fibers into the atmosphere, which reflects radar waves and creates false targets on radar screens. This confuses the radar operator, making it challenging to identify the actual aircraft among the numerous false signals.

In contrast, other options like electronically disrupting the radar or using decoys represent active methods that directly engage with radar systems or create fake targets that mimic the actual aircraft behavior. Publishing false signals refers to transmitting deceptive information rather than creating physical obstructions to radar detection, which is not a method of passive jamming.