# USS Yorktown Divide-by-Zero Failure **Entity class:** Event **Research spine:** [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software]] ## Definition The USS Yorktown divide-by-zero failure was a September 1997 software casualty in which erroneous numerical input propagated through networked systems aboard the Ticonderoga-class cruiser CG-48. ## Chronological Proximity It occurred during [[wiki/Smart Ship|Smart Ship]] experimentation and the broader 1990s turn toward [[wiki/Network-Centric Warfare|network-centric warfare]]. ## Relational Proximity The incident connected data validation, Windows-based ship systems, and platform availability, becoming a compact example of [[wiki/Sovereign Software|software-defined military dependence]]. ## 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]].