# Chaff **Entity class:** Technology **Research spine:** [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software]] ## Definition Chaff is a passive radar countermeasure made from reflective material dispersed to create clutter and false returns. ## Chronological Proximity Its decisive wartime demonstration as [[wiki/Window Chaff|Window]] occurred during [[wiki/Operation Gomorrah|Operation Gomorrah]] in 1943. ## Relational Proximity Chaff complements active [[wiki/Carpet Jammers|jamming]]: one creates deceptive reflections while the other transmits interference into the radar receiver. ## Collection Routes [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] · [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]] · [[wiki/Signals, Silos, and Sovereign Software|Signals, Silos, and Sovereign Software]] ## Sources / Provenance - [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software - Research]].